diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 81574660c..754c8bc2d 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -38,6 +38,9 @@ jobs:
     - uses: actions/setup-node@v3
       with:
         node-version: ${{ matrix.node }}
+    - uses: denoland/setup-deno@v1
+      with:
+        deno-version: v1.x
     - name: Install Rust
       run: rustup update stable --no-self-update && rustup default stable
     - name: Install wasm32-unknown-unknown target
diff --git a/packages/preview2-shim/lib/io/worker-io.js b/packages/preview2-shim/lib/io/worker-io.js
index 3dd02a7e5..dace0c5b8 100644
--- a/packages/preview2-shim/lib/io/worker-io.js
+++ b/packages/preview2-shim/lib/io/worker-io.js
@@ -33,9 +33,8 @@ import {
   STDOUT,
   reverseMap,
 } from "./calls.js";
-import { exit, stderr, stdout, env } from "node:process";
+import nodeProcess, { exit, stderr, stdout, env } from "node:process";
 
-import * as nodeProcess from "node:process";
 const _rawDebug = nodeProcess._rawDebug || console.error.bind(console);
 
 const workerPath = fileURLToPath(
diff --git a/packages/preview2-shim/lib/nodejs/cli.js b/packages/preview2-shim/lib/nodejs/cli.js
index b8da5380c..83438f9e9 100644
--- a/packages/preview2-shim/lib/nodejs/cli.js
+++ b/packages/preview2-shim/lib/nodejs/cli.js
@@ -1,4 +1,4 @@
-import { argv, env, cwd } from "node:process";
+import process, { argv, env, cwd } from "node:process";
 import {
   ioCall,
   streams,
diff --git a/packages/preview2-shim/lib/nodejs/filesystem.js b/packages/preview2-shim/lib/nodejs/filesystem.js
index ef7dfe159..bf9004cb7 100644
--- a/packages/preview2-shim/lib/nodejs/filesystem.js
+++ b/packages/preview2-shim/lib/nodejs/filesystem.js
@@ -7,7 +7,7 @@ import {
 } from "../io/worker-io.js";
 import { INPUT_STREAM_CREATE, OUTPUT_STREAM_CREATE } from "../io/calls.js";
 import { FILE } from "../io/calls.js";
-import {
+import nodeFs, {
   closeSync,
   constants,
   fdatasyncSync,
@@ -32,7 +32,6 @@ import {
 } from "node:fs";
 import { platform } from "node:process";
 
-import * as nodeFs from 'node:fs';
 const lutimesSync = nodeFs.lutimesSync;
 
 const symbolDispose = Symbol.dispose || Symbol.for("dispose");
diff --git a/src/cmd/run.js b/src/cmd/run.js
index 5ea1bad65..e571bfb4c 100644
--- a/src/cmd/run.js
+++ b/src/cmd/run.js
@@ -2,7 +2,7 @@ import { getTmpDir } from '../common.js';
 import { transpile } from './transpile.js';
 import { rm, stat, mkdir, writeFile, symlink } from 'node:fs/promises';
 import { basename, resolve, extname } from 'node:path';
-import { fork } from 'node:child_process';
+import { spawn } from 'node:child_process';
 import process from 'node:process';
 import { fileURLToPath, pathToFileURL } from 'node:url';
 import c from 'chalk-template';
@@ -112,6 +112,7 @@ async function runComponent (componentPath, args, opts, executor) {
     const runPath = resolve(outDir, '_run.js');
     await writeFile(runPath, `
       ${jcoImport ? `import ${JSON.stringify(pathToFileURL(jcoImport))}` : ''}
+      import process from 'node:process';
       try {
         process.argv[1] = "${name}";
       } catch {}
@@ -119,8 +120,10 @@ async function runComponent (componentPath, args, opts, executor) {
       ${executor}
     `);
 
+    const nodePath = process.env.JCO_RUN_PATH || process.argv[0];
+
     process.exitCode = await new Promise((resolve, reject) => {
-      const cp = fork(runPath, args, { stdio: 'inherit' });
+      const cp = spawn(nodePath, [...process.env.JCO_RUN_ARGS ? process.env.JCO_RUN_ARGS.split(' ') : [], runPath, ...args], { stdio: 'inherit' });
 
       cp.on('error', reject);
       cp.on('exit', resolve);
diff --git a/tests/gen/api_proxy.component.wasm b/tests/gen/api_proxy.component.wasm
index de26f91c9..0a98fd4c5 100644
Binary files a/tests/gen/api_proxy.component.wasm and b/tests/gen/api_proxy.component.wasm differ
diff --git a/tests/gen/api_proxy_streaming.component.wasm b/tests/gen/api_proxy_streaming.component.wasm
index 7b5cb18e9..67054e452 100644
Binary files a/tests/gen/api_proxy_streaming.component.wasm and b/tests/gen/api_proxy_streaming.component.wasm differ
diff --git a/tests/gen/api_reactor.component.wasm b/tests/gen/api_reactor.component.wasm
index 8d361e59b..4bd4b6dae 100644
Binary files a/tests/gen/api_reactor.component.wasm and b/tests/gen/api_reactor.component.wasm differ
diff --git a/tests/gen/api_reactor.rs b/tests/gen/api_reactor.rs
index bfe56cbd4..d6c31c6e4 100644
--- a/tests/gen/api_reactor.rs
+++ b/tests/gen/api_reactor.rs
@@ -12,7 +12,6 @@ fn api_reactor() -> anyhow::Result<()> {
         let mut cmd1 = Command::new("node");
         cmd1.arg("./src/jco.js");
         cmd1.arg("run");
-
         cmd1.arg("--jco-dir");
         cmd1.arg("./tests/rundir/api_reactor");
         cmd1.arg("--jco-import");
diff --git a/tests/gen/api_read_only.component.wasm b/tests/gen/api_read_only.component.wasm
index 303241f06..e87b5d646 100644
Binary files a/tests/gen/api_read_only.component.wasm and b/tests/gen/api_read_only.component.wasm differ
diff --git a/tests/gen/api_read_only.rs b/tests/gen/api_read_only.rs
index 5a7fda0f9..39a98ecc4 100644
--- a/tests/gen/api_read_only.rs
+++ b/tests/gen/api_read_only.rs
@@ -13,7 +13,6 @@ fn api_read_only() -> anyhow::Result<()> {
         let mut cmd1 = Command::new("node");
         cmd1.arg("./src/jco.js");
         cmd1.arg("run");
-
         cmd1.arg("--jco-dir");
         cmd1.arg("./tests/rundir/api_read_only");
         cmd1.arg("--jco-import");
diff --git a/tests/gen/api_time.component.wasm b/tests/gen/api_time.component.wasm
index 98646ff26..9be1f2332 100644
Binary files a/tests/gen/api_time.component.wasm and b/tests/gen/api_time.component.wasm differ
diff --git a/tests/gen/api_time.rs b/tests/gen/api_time.rs
index a737326a3..bdd02e33e 100644
--- a/tests/gen/api_time.rs
+++ b/tests/gen/api_time.rs
@@ -12,7 +12,6 @@ fn api_time() -> anyhow::Result<()> {
         let mut cmd1 = Command::new("node");
         cmd1.arg("./src/jco.js");
         cmd1.arg("run");
-
         cmd1.arg("--jco-dir");
         cmd1.arg("./tests/rundir/api_time");
         cmd1.arg("--jco-import");
diff --git a/tests/gen/cli_args.component.wasm b/tests/gen/cli_args.component.wasm
index ac1d9988f..91a222bf3 100644
Binary files a/tests/gen/cli_args.component.wasm and b/tests/gen/cli_args.component.wasm differ
diff --git a/tests/gen/cli_args.rs b/tests/gen/cli_args.rs
index 324ef9b7a..0125c00b9 100644
--- a/tests/gen/cli_args.rs
+++ b/tests/gen/cli_args.rs
@@ -12,7 +12,6 @@ fn cli_args() -> anyhow::Result<()> {
         let mut cmd1 = Command::new("node");
         cmd1.arg("./src/jco.js");
         cmd1.arg("run");
-
         cmd1.arg("--jco-dir");
         cmd1.arg("./tests/rundir/cli_args");
         cmd1.arg("--jco-import");
diff --git a/tests/gen/cli_default_clocks.component.wasm b/tests/gen/cli_default_clocks.component.wasm
index 97862642b..6dc4f81f3 100644
Binary files a/tests/gen/cli_default_clocks.component.wasm and b/tests/gen/cli_default_clocks.component.wasm differ
diff --git a/tests/gen/cli_default_clocks.rs b/tests/gen/cli_default_clocks.rs
index e02b40fb3..5f292ce1a 100644
--- a/tests/gen/cli_default_clocks.rs
+++ b/tests/gen/cli_default_clocks.rs
@@ -12,7 +12,6 @@ fn cli_default_clocks() -> anyhow::Result<()> {
         let mut cmd1 = Command::new("node");
         cmd1.arg("./src/jco.js");
         cmd1.arg("run");
-
         cmd1.arg("--jco-dir");
         cmd1.arg("./tests/rundir/cli_default_clocks");
         cmd1.arg("--jco-import");
diff --git a/tests/gen/cli_directory_list.component.wasm b/tests/gen/cli_directory_list.component.wasm
index 9b5c9a105..ae837e833 100644
Binary files a/tests/gen/cli_directory_list.component.wasm and b/tests/gen/cli_directory_list.component.wasm differ
diff --git a/tests/gen/cli_directory_list.rs b/tests/gen/cli_directory_list.rs
index 5f618629f..6405f2ac8 100644
--- a/tests/gen/cli_directory_list.rs
+++ b/tests/gen/cli_directory_list.rs
@@ -12,7 +12,6 @@ fn cli_directory_list() -> anyhow::Result<()> {
         let mut cmd1 = Command::new("node");
         cmd1.arg("./src/jco.js");
         cmd1.arg("run");
-
         cmd1.arg("--jco-dir");
         cmd1.arg("./tests/rundir/cli_directory_list");
         cmd1.arg("--jco-import");
diff --git a/tests/gen/cli_env.component.wasm b/tests/gen/cli_env.component.wasm
index 90de05c29..cd6880900 100644
Binary files a/tests/gen/cli_env.component.wasm and b/tests/gen/cli_env.component.wasm differ
diff --git a/tests/gen/cli_env.rs b/tests/gen/cli_env.rs
index 7130d1fa3..aca8dff2c 100644
--- a/tests/gen/cli_env.rs
+++ b/tests/gen/cli_env.rs
@@ -12,7 +12,6 @@ fn cli_env() -> anyhow::Result<()> {
         let mut cmd1 = Command::new("node");
         cmd1.arg("./src/jco.js");
         cmd1.arg("run");
-
         cmd1.arg("--jco-dir");
         cmd1.arg("./tests/rundir/cli_env");
         cmd1.arg("--jco-import");
diff --git a/tests/gen/cli_exit_default.component.wasm b/tests/gen/cli_exit_default.component.wasm
index 399f22b5d..3adb5603b 100644
Binary files a/tests/gen/cli_exit_default.component.wasm and b/tests/gen/cli_exit_default.component.wasm differ
diff --git a/tests/gen/cli_exit_default.rs b/tests/gen/cli_exit_default.rs
index 0f4dec4f8..4e2b796ea 100644
--- a/tests/gen/cli_exit_default.rs
+++ b/tests/gen/cli_exit_default.rs
@@ -12,7 +12,6 @@ fn cli_exit_default() -> anyhow::Result<()> {
         let mut cmd1 = Command::new("node");
         cmd1.arg("./src/jco.js");
         cmd1.arg("run");
-
         cmd1.arg("--jco-dir");
         cmd1.arg("./tests/rundir/cli_exit_default");
         cmd1.arg("--jco-import");
diff --git a/tests/gen/cli_exit_failure.component.wasm b/tests/gen/cli_exit_failure.component.wasm
index 8c9f3a7bc..6a7e7c3e9 100644
Binary files a/tests/gen/cli_exit_failure.component.wasm and b/tests/gen/cli_exit_failure.component.wasm differ
diff --git a/tests/gen/cli_exit_failure.rs b/tests/gen/cli_exit_failure.rs
index 2ee2e9075..5594bc945 100644
--- a/tests/gen/cli_exit_failure.rs
+++ b/tests/gen/cli_exit_failure.rs
@@ -12,7 +12,6 @@ fn cli_exit_failure() -> anyhow::Result<()> {
         let mut cmd1 = Command::new("node");
         cmd1.arg("./src/jco.js");
         cmd1.arg("run");
-
         cmd1.arg("--jco-dir");
         cmd1.arg("./tests/rundir/cli_exit_failure");
         cmd1.arg("--jco-import");
diff --git a/tests/gen/cli_exit_panic.component.wasm b/tests/gen/cli_exit_panic.component.wasm
index be3e850da..f2009c3eb 100644
Binary files a/tests/gen/cli_exit_panic.component.wasm and b/tests/gen/cli_exit_panic.component.wasm differ
diff --git a/tests/gen/cli_exit_panic.rs b/tests/gen/cli_exit_panic.rs
index a4df7de78..0aac8afbe 100644
--- a/tests/gen/cli_exit_panic.rs
+++ b/tests/gen/cli_exit_panic.rs
@@ -12,7 +12,6 @@ fn cli_exit_panic() -> anyhow::Result<()> {
         let mut cmd1 = Command::new("node");
         cmd1.arg("./src/jco.js");
         cmd1.arg("run");
-
         cmd1.arg("--jco-dir");
         cmd1.arg("./tests/rundir/cli_exit_panic");
         cmd1.arg("--jco-import");
diff --git a/tests/gen/cli_exit_success.component.wasm b/tests/gen/cli_exit_success.component.wasm
index 5cf35a938..29b932956 100644
Binary files a/tests/gen/cli_exit_success.component.wasm and b/tests/gen/cli_exit_success.component.wasm differ
diff --git a/tests/gen/cli_exit_success.rs b/tests/gen/cli_exit_success.rs
index bd6d9560e..305019780 100644
--- a/tests/gen/cli_exit_success.rs
+++ b/tests/gen/cli_exit_success.rs
@@ -12,7 +12,6 @@ fn cli_exit_success() -> anyhow::Result<()> {
         let mut cmd1 = Command::new("node");
         cmd1.arg("./src/jco.js");
         cmd1.arg("run");
-
         cmd1.arg("--jco-dir");
         cmd1.arg("./tests/rundir/cli_exit_success");
         cmd1.arg("--jco-import");
diff --git a/tests/gen/cli_export_cabi_realloc.component.wasm b/tests/gen/cli_export_cabi_realloc.component.wasm
index 6900b3f76..e8f53acf8 100644
Binary files a/tests/gen/cli_export_cabi_realloc.component.wasm and b/tests/gen/cli_export_cabi_realloc.component.wasm differ
diff --git a/tests/gen/cli_export_cabi_realloc.rs b/tests/gen/cli_export_cabi_realloc.rs
index a74a8d266..6e939f1bf 100644
--- a/tests/gen/cli_export_cabi_realloc.rs
+++ b/tests/gen/cli_export_cabi_realloc.rs
@@ -12,7 +12,6 @@ fn cli_export_cabi_realloc() -> anyhow::Result<()> {
         let mut cmd1 = Command::new("node");
         cmd1.arg("./src/jco.js");
         cmd1.arg("run");
-
         cmd1.arg("--jco-dir");
         cmd1.arg("./tests/rundir/cli_export_cabi_realloc");
         cmd1.arg("--jco-import");
diff --git a/tests/gen/cli_file_append.component.wasm b/tests/gen/cli_file_append.component.wasm
index 2f592b791..5a2793c90 100644
Binary files a/tests/gen/cli_file_append.component.wasm and b/tests/gen/cli_file_append.component.wasm differ
diff --git a/tests/gen/cli_file_append.rs b/tests/gen/cli_file_append.rs
index d2424db61..a02f037d4 100644
--- a/tests/gen/cli_file_append.rs
+++ b/tests/gen/cli_file_append.rs
@@ -12,7 +12,6 @@ fn cli_file_append() -> anyhow::Result<()> {
         let mut cmd1 = Command::new("node");
         cmd1.arg("./src/jco.js");
         cmd1.arg("run");
-
         cmd1.arg("--jco-dir");
         cmd1.arg("./tests/rundir/cli_file_append");
         cmd1.arg("--jco-import");
diff --git a/tests/gen/cli_file_dir_sync.component.wasm b/tests/gen/cli_file_dir_sync.component.wasm
index 46d64e5ea..256357430 100644
Binary files a/tests/gen/cli_file_dir_sync.component.wasm and b/tests/gen/cli_file_dir_sync.component.wasm differ
diff --git a/tests/gen/cli_file_dir_sync.rs b/tests/gen/cli_file_dir_sync.rs
index b78340ab6..a5613d4de 100644
--- a/tests/gen/cli_file_dir_sync.rs
+++ b/tests/gen/cli_file_dir_sync.rs
@@ -12,7 +12,6 @@ fn cli_file_dir_sync() -> anyhow::Result<()> {
         let mut cmd1 = Command::new("node");
         cmd1.arg("./src/jco.js");
         cmd1.arg("run");
-
         cmd1.arg("--jco-dir");
         cmd1.arg("./tests/rundir/cli_file_dir_sync");
         cmd1.arg("--jco-import");
diff --git a/tests/gen/cli_file_read.component.wasm b/tests/gen/cli_file_read.component.wasm
index 7a38672ce..359430fcb 100644
Binary files a/tests/gen/cli_file_read.component.wasm and b/tests/gen/cli_file_read.component.wasm differ
diff --git a/tests/gen/cli_file_read.rs b/tests/gen/cli_file_read.rs
index 1ba975ca9..acacc16a3 100644
--- a/tests/gen/cli_file_read.rs
+++ b/tests/gen/cli_file_read.rs
@@ -12,7 +12,6 @@ fn cli_file_read() -> anyhow::Result<()> {
         let mut cmd1 = Command::new("node");
         cmd1.arg("./src/jco.js");
         cmd1.arg("run");
-
         cmd1.arg("--jco-dir");
         cmd1.arg("./tests/rundir/cli_file_read");
         cmd1.arg("--jco-import");
diff --git a/tests/gen/cli_hello_stdout.component.wasm b/tests/gen/cli_hello_stdout.component.wasm
index e5ca4ac4f..4df114a16 100644
Binary files a/tests/gen/cli_hello_stdout.component.wasm and b/tests/gen/cli_hello_stdout.component.wasm differ
diff --git a/tests/gen/cli_hello_stdout.rs b/tests/gen/cli_hello_stdout.rs
index 18ace3264..697f4830a 100644
--- a/tests/gen/cli_hello_stdout.rs
+++ b/tests/gen/cli_hello_stdout.rs
@@ -12,7 +12,6 @@ fn cli_hello_stdout() -> anyhow::Result<()> {
         let mut cmd1 = Command::new("node");
         cmd1.arg("./src/jco.js");
         cmd1.arg("run");
-
         cmd1.arg("--jco-dir");
         cmd1.arg("./tests/rundir/cli_hello_stdout");
         cmd1.arg("--jco-import");
diff --git a/tests/gen/cli_no_ip_name_lookup.component.wasm b/tests/gen/cli_no_ip_name_lookup.component.wasm
index e7ddb5009..7f0e93246 100644
Binary files a/tests/gen/cli_no_ip_name_lookup.component.wasm and b/tests/gen/cli_no_ip_name_lookup.component.wasm differ
diff --git a/tests/gen/cli_no_ip_name_lookup.rs b/tests/gen/cli_no_ip_name_lookup.rs
index 77b3f5429..2562f2bad 100644
--- a/tests/gen/cli_no_ip_name_lookup.rs
+++ b/tests/gen/cli_no_ip_name_lookup.rs
@@ -12,7 +12,6 @@ fn cli_no_ip_name_lookup() -> anyhow::Result<()> {
         let mut cmd1 = Command::new("node");
         cmd1.arg("./src/jco.js");
         cmd1.arg("run");
-
         cmd1.arg("--jco-dir");
         cmd1.arg("./tests/rundir/cli_no_ip_name_lookup");
         cmd1.arg("--jco-import");
diff --git a/tests/gen/cli_no_tcp.component.wasm b/tests/gen/cli_no_tcp.component.wasm
index 43e351177..8bafe905a 100644
Binary files a/tests/gen/cli_no_tcp.component.wasm and b/tests/gen/cli_no_tcp.component.wasm differ
diff --git a/tests/gen/cli_no_tcp.rs b/tests/gen/cli_no_tcp.rs
index 973ba164f..4d5749670 100644
--- a/tests/gen/cli_no_tcp.rs
+++ b/tests/gen/cli_no_tcp.rs
@@ -12,7 +12,6 @@ fn cli_no_tcp() -> anyhow::Result<()> {
         let mut cmd1 = Command::new("node");
         cmd1.arg("./src/jco.js");
         cmd1.arg("run");
-
         cmd1.arg("--jco-dir");
         cmd1.arg("./tests/rundir/cli_no_tcp");
         cmd1.arg("--jco-import");
diff --git a/tests/gen/cli_no_udp.component.wasm b/tests/gen/cli_no_udp.component.wasm
index 5a85d0c83..68b58c969 100644
Binary files a/tests/gen/cli_no_udp.component.wasm and b/tests/gen/cli_no_udp.component.wasm differ
diff --git a/tests/gen/cli_no_udp.rs b/tests/gen/cli_no_udp.rs
index f67bd3d74..74eeb9c60 100644
--- a/tests/gen/cli_no_udp.rs
+++ b/tests/gen/cli_no_udp.rs
@@ -12,7 +12,6 @@ fn cli_no_udp() -> anyhow::Result<()> {
         let mut cmd1 = Command::new("node");
         cmd1.arg("./src/jco.js");
         cmd1.arg("run");
-
         cmd1.arg("--jco-dir");
         cmd1.arg("./tests/rundir/cli_no_udp");
         cmd1.arg("--jco-import");
diff --git a/tests/gen/cli_splice_stdin.component.wasm b/tests/gen/cli_splice_stdin.component.wasm
index d39173519..a903b61c2 100644
Binary files a/tests/gen/cli_splice_stdin.component.wasm and b/tests/gen/cli_splice_stdin.component.wasm differ
diff --git a/tests/gen/cli_splice_stdin.rs b/tests/gen/cli_splice_stdin.rs
index 495f4db03..7b79b5ad9 100644
--- a/tests/gen/cli_splice_stdin.rs
+++ b/tests/gen/cli_splice_stdin.rs
@@ -12,7 +12,6 @@ fn cli_splice_stdin() -> anyhow::Result<()> {
         let mut cmd1 = Command::new("node");
         cmd1.arg("./src/jco.js");
         cmd1.arg("run");
-
         cmd1.arg("--jco-dir");
         cmd1.arg("./tests/rundir/cli_splice_stdin");
         cmd1.arg("--jco-import");
diff --git a/tests/gen/cli_stdin.component.wasm b/tests/gen/cli_stdin.component.wasm
index e8f6135c9..fe734d51e 100644
Binary files a/tests/gen/cli_stdin.component.wasm and b/tests/gen/cli_stdin.component.wasm differ
diff --git a/tests/gen/cli_stdin.rs b/tests/gen/cli_stdin.rs
index b3512f8f1..0e20d3359 100644
--- a/tests/gen/cli_stdin.rs
+++ b/tests/gen/cli_stdin.rs
@@ -13,7 +13,6 @@ fn cli_stdin() -> anyhow::Result<()> {
         let mut cmd1 = Command::new("node");
         cmd1.arg("./src/jco.js");
         cmd1.arg("run");
-
         cmd1.arg("--jco-dir");
         cmd1.arg("./tests/rundir/cli_stdin");
         cmd1.arg("--jco-import");
diff --git a/tests/gen/cli_stdio_write_flushes.component.wasm b/tests/gen/cli_stdio_write_flushes.component.wasm
index e74aa0828..fe1d3c362 100644
Binary files a/tests/gen/cli_stdio_write_flushes.component.wasm and b/tests/gen/cli_stdio_write_flushes.component.wasm differ
diff --git a/tests/gen/cli_stdio_write_flushes.rs b/tests/gen/cli_stdio_write_flushes.rs
index b1bfdf9f1..b01dcdbb3 100644
--- a/tests/gen/cli_stdio_write_flushes.rs
+++ b/tests/gen/cli_stdio_write_flushes.rs
@@ -12,7 +12,6 @@ fn cli_stdio_write_flushes() -> anyhow::Result<()> {
         let mut cmd1 = Command::new("node");
         cmd1.arg("./src/jco.js");
         cmd1.arg("run");
-
         cmd1.arg("--jco-dir");
         cmd1.arg("./tests/rundir/cli_stdio_write_flushes");
         cmd1.arg("--jco-import");
diff --git a/tests/gen/deno_api_reactor.rs b/tests/gen/deno_api_reactor.rs
new file mode 100644
index 000000000..01dbcd905
--- /dev/null
+++ b/tests/gen/deno_api_reactor.rs
@@ -0,0 +1,29 @@
+//! This file has been auto-generated, please do not modify manually
+//! To regenerate this file re-run `cargo xtask generate tests` from the project root
+
+use std::fs;
+use std::process::{Command, Stdio};
+
+#[test]
+fn api_reactor() -> anyhow::Result<()> {
+    {
+        let wasi_file = "./tests/gen/api_reactor.component.wasm";
+        let _ = fs::remove_dir_all("./tests/rundir/deno_api_reactor");
+        let mut cmd1 = Command::new("node");
+        cmd1.arg("./src/jco.js");
+        cmd1.arg("run");
+        cmd1.env("JCO_RUN_PATH", "deno")
+            .env("JCO_RUN_ARGS", "run --importmap ./tests/importmap.json -A");
+        cmd1.arg("--jco-dir");
+        cmd1.arg("./tests/rundir/deno_api_reactor");
+        cmd1.arg("--jco-import");
+        cmd1.arg("./tests/virtualenvs/base.js");
+        cmd1.arg(wasi_file);
+        cmd1.args(&["hello", "this", "", "is an argument", "with 🚩 emoji"]);
+        cmd1.stdin(Stdio::null());
+        let mut cmd1_child = cmd1.spawn().expect("failed to spawn test program");
+        let status = cmd1_child.wait().expect("failed to wait on child");
+        assert!(status.success(), "test execution failed");
+    }
+    Ok(())
+}
diff --git a/tests/gen/deno_api_time.rs b/tests/gen/deno_api_time.rs
new file mode 100644
index 000000000..b28190f44
--- /dev/null
+++ b/tests/gen/deno_api_time.rs
@@ -0,0 +1,29 @@
+//! This file has been auto-generated, please do not modify manually
+//! To regenerate this file re-run `cargo xtask generate tests` from the project root
+
+use std::fs;
+use std::process::{Command, Stdio};
+
+#[test]
+fn api_time() -> anyhow::Result<()> {
+    {
+        let wasi_file = "./tests/gen/api_time.component.wasm";
+        let _ = fs::remove_dir_all("./tests/rundir/deno_api_time");
+        let mut cmd1 = Command::new("node");
+        cmd1.arg("./src/jco.js");
+        cmd1.arg("run");
+        cmd1.env("JCO_RUN_PATH", "deno")
+            .env("JCO_RUN_ARGS", "run --importmap ./tests/importmap.json -A");
+        cmd1.arg("--jco-dir");
+        cmd1.arg("./tests/rundir/deno_api_time");
+        cmd1.arg("--jco-import");
+        cmd1.arg("./tests/virtualenvs/fakeclocks.js");
+        cmd1.arg(wasi_file);
+        cmd1.args(&["hello", "this", "", "is an argument", "with 🚩 emoji"]);
+        cmd1.stdin(Stdio::null());
+        let mut cmd1_child = cmd1.spawn().expect("failed to spawn test program");
+        let status = cmd1_child.wait().expect("failed to wait on child");
+        assert!(status.success(), "test execution failed");
+    }
+    Ok(())
+}
diff --git a/tests/gen/deno_cli_args.rs b/tests/gen/deno_cli_args.rs
new file mode 100644
index 000000000..582927346
--- /dev/null
+++ b/tests/gen/deno_cli_args.rs
@@ -0,0 +1,29 @@
+//! This file has been auto-generated, please do not modify manually
+//! To regenerate this file re-run `cargo xtask generate tests` from the project root
+
+use std::fs;
+use std::process::{Command, Stdio};
+
+#[test]
+fn cli_args() -> anyhow::Result<()> {
+    {
+        let wasi_file = "./tests/gen/cli_args.component.wasm";
+        let _ = fs::remove_dir_all("./tests/rundir/deno_cli_args");
+        let mut cmd1 = Command::new("node");
+        cmd1.arg("./src/jco.js");
+        cmd1.arg("run");
+        cmd1.env("JCO_RUN_PATH", "deno")
+            .env("JCO_RUN_ARGS", "run --importmap ./tests/importmap.json -A");
+        cmd1.arg("--jco-dir");
+        cmd1.arg("./tests/rundir/deno_cli_args");
+        cmd1.arg("--jco-import");
+        cmd1.arg("./tests/virtualenvs/base.js");
+        cmd1.arg(wasi_file);
+        cmd1.args(&["hello", "this", "", "is an argument", "with 🚩 emoji"]);
+        cmd1.stdin(Stdio::null());
+        let mut cmd1_child = cmd1.spawn().expect("failed to spawn test program");
+        let status = cmd1_child.wait().expect("failed to wait on child");
+        assert!(status.success(), "test execution failed");
+    }
+    Ok(())
+}
diff --git a/tests/gen/deno_cli_env.rs b/tests/gen/deno_cli_env.rs
new file mode 100644
index 000000000..de88fabc2
--- /dev/null
+++ b/tests/gen/deno_cli_env.rs
@@ -0,0 +1,29 @@
+//! This file has been auto-generated, please do not modify manually
+//! To regenerate this file re-run `cargo xtask generate tests` from the project root
+
+use std::fs;
+use std::process::{Command, Stdio};
+
+#[test]
+fn cli_env() -> anyhow::Result<()> {
+    {
+        let wasi_file = "./tests/gen/cli_env.component.wasm";
+        let _ = fs::remove_dir_all("./tests/rundir/deno_cli_env");
+        let mut cmd1 = Command::new("node");
+        cmd1.arg("./src/jco.js");
+        cmd1.arg("run");
+        cmd1.env("JCO_RUN_PATH", "deno")
+            .env("JCO_RUN_ARGS", "run --importmap ./tests/importmap.json -A");
+        cmd1.arg("--jco-dir");
+        cmd1.arg("./tests/rundir/deno_cli_env");
+        cmd1.arg("--jco-import");
+        cmd1.arg("./tests/virtualenvs/envtest.js");
+        cmd1.arg(wasi_file);
+        cmd1.args(&["hello", "this", "", "is an argument", "with 🚩 emoji"]);
+        cmd1.stdin(Stdio::null());
+        let mut cmd1_child = cmd1.spawn().expect("failed to spawn test program");
+        let status = cmd1_child.wait().expect("failed to wait on child");
+        assert!(status.success(), "test execution failed");
+    }
+    Ok(())
+}
diff --git a/tests/gen/deno_cli_exit_default.rs b/tests/gen/deno_cli_exit_default.rs
new file mode 100644
index 000000000..d87c8a038
--- /dev/null
+++ b/tests/gen/deno_cli_exit_default.rs
@@ -0,0 +1,29 @@
+//! This file has been auto-generated, please do not modify manually
+//! To regenerate this file re-run `cargo xtask generate tests` from the project root
+
+use std::fs;
+use std::process::{Command, Stdio};
+
+#[test]
+fn cli_exit_default() -> anyhow::Result<()> {
+    {
+        let wasi_file = "./tests/gen/cli_exit_default.component.wasm";
+        let _ = fs::remove_dir_all("./tests/rundir/deno_cli_exit_default");
+        let mut cmd1 = Command::new("node");
+        cmd1.arg("./src/jco.js");
+        cmd1.arg("run");
+        cmd1.env("JCO_RUN_PATH", "deno")
+            .env("JCO_RUN_ARGS", "run --importmap ./tests/importmap.json -A");
+        cmd1.arg("--jco-dir");
+        cmd1.arg("./tests/rundir/deno_cli_exit_default");
+        cmd1.arg("--jco-import");
+        cmd1.arg("./tests/virtualenvs/base.js");
+        cmd1.arg(wasi_file);
+        cmd1.args(&["hello", "this", "", "is an argument", "with 🚩 emoji"]);
+        cmd1.stdin(Stdio::null());
+        let mut cmd1_child = cmd1.spawn().expect("failed to spawn test program");
+        let status = cmd1_child.wait().expect("failed to wait on child");
+        assert!(status.success(), "test execution failed");
+    }
+    Ok(())
+}
diff --git a/tests/gen/deno_cli_exit_failure.rs b/tests/gen/deno_cli_exit_failure.rs
new file mode 100644
index 000000000..7cc459a70
--- /dev/null
+++ b/tests/gen/deno_cli_exit_failure.rs
@@ -0,0 +1,29 @@
+//! This file has been auto-generated, please do not modify manually
+//! To regenerate this file re-run `cargo xtask generate tests` from the project root
+
+use std::fs;
+use std::process::{Command, Stdio};
+
+#[test]
+fn cli_exit_failure() -> anyhow::Result<()> {
+    {
+        let wasi_file = "./tests/gen/cli_exit_failure.component.wasm";
+        let _ = fs::remove_dir_all("./tests/rundir/deno_cli_exit_failure");
+        let mut cmd1 = Command::new("node");
+        cmd1.arg("./src/jco.js");
+        cmd1.arg("run");
+        cmd1.env("JCO_RUN_PATH", "deno")
+            .env("JCO_RUN_ARGS", "run --importmap ./tests/importmap.json -A");
+        cmd1.arg("--jco-dir");
+        cmd1.arg("./tests/rundir/deno_cli_exit_failure");
+        cmd1.arg("--jco-import");
+        cmd1.arg("./tests/virtualenvs/base.js");
+        cmd1.arg(wasi_file);
+        cmd1.args(&["hello", "this", "", "is an argument", "with 🚩 emoji"]);
+        cmd1.stdin(Stdio::null());
+        let mut cmd1_child = cmd1.spawn().expect("failed to spawn test program");
+        let status = cmd1_child.wait().expect("failed to wait on child");
+        assert!(!status.success(), "test execution failed");
+    }
+    Ok(())
+}
diff --git a/tests/gen/deno_cli_exit_success.rs b/tests/gen/deno_cli_exit_success.rs
new file mode 100644
index 000000000..19f5e77d3
--- /dev/null
+++ b/tests/gen/deno_cli_exit_success.rs
@@ -0,0 +1,29 @@
+//! This file has been auto-generated, please do not modify manually
+//! To regenerate this file re-run `cargo xtask generate tests` from the project root
+
+use std::fs;
+use std::process::{Command, Stdio};
+
+#[test]
+fn cli_exit_success() -> anyhow::Result<()> {
+    {
+        let wasi_file = "./tests/gen/cli_exit_success.component.wasm";
+        let _ = fs::remove_dir_all("./tests/rundir/deno_cli_exit_success");
+        let mut cmd1 = Command::new("node");
+        cmd1.arg("./src/jco.js");
+        cmd1.arg("run");
+        cmd1.env("JCO_RUN_PATH", "deno")
+            .env("JCO_RUN_ARGS", "run --importmap ./tests/importmap.json -A");
+        cmd1.arg("--jco-dir");
+        cmd1.arg("./tests/rundir/deno_cli_exit_success");
+        cmd1.arg("--jco-import");
+        cmd1.arg("./tests/virtualenvs/base.js");
+        cmd1.arg(wasi_file);
+        cmd1.args(&["hello", "this", "", "is an argument", "with 🚩 emoji"]);
+        cmd1.stdin(Stdio::null());
+        let mut cmd1_child = cmd1.spawn().expect("failed to spawn test program");
+        let status = cmd1_child.wait().expect("failed to wait on child");
+        assert!(status.success(), "test execution failed");
+    }
+    Ok(())
+}
diff --git a/tests/gen/deno_preview1_big_random_buf.rs b/tests/gen/deno_preview1_big_random_buf.rs
new file mode 100644
index 000000000..1abc313d1
--- /dev/null
+++ b/tests/gen/deno_preview1_big_random_buf.rs
@@ -0,0 +1,29 @@
+//! This file has been auto-generated, please do not modify manually
+//! To regenerate this file re-run `cargo xtask generate tests` from the project root
+
+use std::fs;
+use std::process::{Command, Stdio};
+
+#[test]
+fn preview1_big_random_buf() -> anyhow::Result<()> {
+    {
+        let wasi_file = "./tests/gen/preview1_big_random_buf.component.wasm";
+        let _ = fs::remove_dir_all("./tests/rundir/deno_preview1_big_random_buf");
+        let mut cmd1 = Command::new("node");
+        cmd1.arg("./src/jco.js");
+        cmd1.arg("run");
+        cmd1.env("JCO_RUN_PATH", "deno")
+            .env("JCO_RUN_ARGS", "run --importmap ./tests/importmap.json -A");
+        cmd1.arg("--jco-dir");
+        cmd1.arg("./tests/rundir/deno_preview1_big_random_buf");
+        cmd1.arg("--jco-import");
+        cmd1.arg("./tests/virtualenvs/scratch.js");
+        cmd1.arg(wasi_file);
+        cmd1.args(&["hello", "this", "", "is an argument", "with 🚩 emoji"]);
+        cmd1.stdin(Stdio::null());
+        let mut cmd1_child = cmd1.spawn().expect("failed to spawn test program");
+        let status = cmd1_child.wait().expect("failed to wait on child");
+        assert!(status.success(), "test execution failed");
+    }
+    Ok(())
+}
diff --git a/tests/gen/deno_preview2_random.rs b/tests/gen/deno_preview2_random.rs
new file mode 100644
index 000000000..c2c1ddb75
--- /dev/null
+++ b/tests/gen/deno_preview2_random.rs
@@ -0,0 +1,29 @@
+//! This file has been auto-generated, please do not modify manually
+//! To regenerate this file re-run `cargo xtask generate tests` from the project root
+
+use std::fs;
+use std::process::{Command, Stdio};
+
+#[test]
+fn preview2_random() -> anyhow::Result<()> {
+    {
+        let wasi_file = "./tests/gen/preview2_random.component.wasm";
+        let _ = fs::remove_dir_all("./tests/rundir/deno_preview2_random");
+        let mut cmd1 = Command::new("node");
+        cmd1.arg("./src/jco.js");
+        cmd1.arg("run");
+        cmd1.env("JCO_RUN_PATH", "deno")
+            .env("JCO_RUN_ARGS", "run --importmap ./tests/importmap.json -A");
+        cmd1.arg("--jco-dir");
+        cmd1.arg("./tests/rundir/deno_preview2_random");
+        cmd1.arg("--jco-import");
+        cmd1.arg("./tests/virtualenvs/base.js");
+        cmd1.arg(wasi_file);
+        cmd1.args(&["hello", "this", "", "is an argument", "with 🚩 emoji"]);
+        cmd1.stdin(Stdio::null());
+        let mut cmd1_child = cmd1.spawn().expect("failed to spawn test program");
+        let status = cmd1_child.wait().expect("failed to wait on child");
+        assert!(status.success(), "test execution failed");
+    }
+    Ok(())
+}
diff --git a/tests/gen/http_outbound_request_content_length.component.wasm b/tests/gen/http_outbound_request_content_length.component.wasm
index ef56a4771..8230b1126 100644
Binary files a/tests/gen/http_outbound_request_content_length.component.wasm and b/tests/gen/http_outbound_request_content_length.component.wasm differ
diff --git a/tests/gen/http_outbound_request_content_length.rs b/tests/gen/http_outbound_request_content_length.rs
index 1c2118f9c..f6f4a40e7 100644
--- a/tests/gen/http_outbound_request_content_length.rs
+++ b/tests/gen/http_outbound_request_content_length.rs
@@ -12,7 +12,6 @@ fn http_outbound_request_content_length() -> anyhow::Result<()> {
         let mut cmd1 = Command::new("node");
         cmd1.arg("./src/jco.js");
         cmd1.arg("run");
-
         cmd1.arg("--jco-dir");
         cmd1.arg("./tests/rundir/http_outbound_request_content_length");
         cmd1.arg("--jco-import");
diff --git a/tests/gen/http_outbound_request_get.component.wasm b/tests/gen/http_outbound_request_get.component.wasm
index 337f81196..1146bdb85 100644
Binary files a/tests/gen/http_outbound_request_get.component.wasm and b/tests/gen/http_outbound_request_get.component.wasm differ
diff --git a/tests/gen/http_outbound_request_get.rs b/tests/gen/http_outbound_request_get.rs
index 47295784c..d945eee27 100644
--- a/tests/gen/http_outbound_request_get.rs
+++ b/tests/gen/http_outbound_request_get.rs
@@ -12,7 +12,6 @@ fn http_outbound_request_get() -> anyhow::Result<()> {
         let mut cmd1 = Command::new("node");
         cmd1.arg("./src/jco.js");
         cmd1.arg("run");
-
         cmd1.arg("--jco-dir");
         cmd1.arg("./tests/rundir/http_outbound_request_get");
         cmd1.arg("--jco-import");
diff --git a/tests/gen/http_outbound_request_invalid_dnsname.component.wasm b/tests/gen/http_outbound_request_invalid_dnsname.component.wasm
index c5c2f8062..80914663f 100644
Binary files a/tests/gen/http_outbound_request_invalid_dnsname.component.wasm and b/tests/gen/http_outbound_request_invalid_dnsname.component.wasm differ
diff --git a/tests/gen/http_outbound_request_invalid_dnsname.rs b/tests/gen/http_outbound_request_invalid_dnsname.rs
index 41c404a7d..18e6bbb74 100644
--- a/tests/gen/http_outbound_request_invalid_dnsname.rs
+++ b/tests/gen/http_outbound_request_invalid_dnsname.rs
@@ -12,7 +12,6 @@ fn http_outbound_request_invalid_dnsname() -> anyhow::Result<()> {
         let mut cmd1 = Command::new("node");
         cmd1.arg("./src/jco.js");
         cmd1.arg("run");
-
         cmd1.arg("--jco-dir");
         cmd1.arg("./tests/rundir/http_outbound_request_invalid_dnsname");
         cmd1.arg("--jco-import");
diff --git a/tests/gen/http_outbound_request_invalid_header.component.wasm b/tests/gen/http_outbound_request_invalid_header.component.wasm
index 2f7ffdcf0..afd86a033 100644
Binary files a/tests/gen/http_outbound_request_invalid_header.component.wasm and b/tests/gen/http_outbound_request_invalid_header.component.wasm differ
diff --git a/tests/gen/http_outbound_request_invalid_header.rs b/tests/gen/http_outbound_request_invalid_header.rs
index 776f12813..a8ff438fa 100644
--- a/tests/gen/http_outbound_request_invalid_header.rs
+++ b/tests/gen/http_outbound_request_invalid_header.rs
@@ -12,7 +12,6 @@ fn http_outbound_request_invalid_header() -> anyhow::Result<()> {
         let mut cmd1 = Command::new("node");
         cmd1.arg("./src/jco.js");
         cmd1.arg("run");
-
         cmd1.arg("--jco-dir");
         cmd1.arg("./tests/rundir/http_outbound_request_invalid_header");
         cmd1.arg("--jco-import");
diff --git a/tests/gen/http_outbound_request_invalid_port.component.wasm b/tests/gen/http_outbound_request_invalid_port.component.wasm
index 556299b53..01888f80b 100644
Binary files a/tests/gen/http_outbound_request_invalid_port.component.wasm and b/tests/gen/http_outbound_request_invalid_port.component.wasm differ
diff --git a/tests/gen/http_outbound_request_invalid_port.rs b/tests/gen/http_outbound_request_invalid_port.rs
index c18362777..9dd4d63c6 100644
--- a/tests/gen/http_outbound_request_invalid_port.rs
+++ b/tests/gen/http_outbound_request_invalid_port.rs
@@ -12,7 +12,6 @@ fn http_outbound_request_invalid_port() -> anyhow::Result<()> {
         let mut cmd1 = Command::new("node");
         cmd1.arg("./src/jco.js");
         cmd1.arg("run");
-
         cmd1.arg("--jco-dir");
         cmd1.arg("./tests/rundir/http_outbound_request_invalid_port");
         cmd1.arg("--jco-import");
diff --git a/tests/gen/http_outbound_request_invalid_version.component.wasm b/tests/gen/http_outbound_request_invalid_version.component.wasm
index 98a31861e..312ab0423 100644
Binary files a/tests/gen/http_outbound_request_invalid_version.component.wasm and b/tests/gen/http_outbound_request_invalid_version.component.wasm differ
diff --git a/tests/gen/http_outbound_request_invalid_version.rs b/tests/gen/http_outbound_request_invalid_version.rs
index 85834d4a6..2540cb15c 100644
--- a/tests/gen/http_outbound_request_invalid_version.rs
+++ b/tests/gen/http_outbound_request_invalid_version.rs
@@ -12,7 +12,6 @@ fn http_outbound_request_invalid_version() -> anyhow::Result<()> {
         let mut cmd1 = Command::new("node");
         cmd1.arg("./src/jco.js");
         cmd1.arg("run");
-
         cmd1.arg("--jco-dir");
         cmd1.arg("./tests/rundir/http_outbound_request_invalid_version");
         cmd1.arg("--jco-import");
diff --git a/tests/gen/http_outbound_request_large_post.component.wasm b/tests/gen/http_outbound_request_large_post.component.wasm
index 5be61213a..2e5b7b675 100644
Binary files a/tests/gen/http_outbound_request_large_post.component.wasm and b/tests/gen/http_outbound_request_large_post.component.wasm differ
diff --git a/tests/gen/http_outbound_request_large_post.rs b/tests/gen/http_outbound_request_large_post.rs
index ed4ce92b3..288f14d1d 100644
--- a/tests/gen/http_outbound_request_large_post.rs
+++ b/tests/gen/http_outbound_request_large_post.rs
@@ -12,7 +12,6 @@ fn http_outbound_request_large_post() -> anyhow::Result<()> {
         let mut cmd1 = Command::new("node");
         cmd1.arg("./src/jco.js");
         cmd1.arg("run");
-
         cmd1.arg("--jco-dir");
         cmd1.arg("./tests/rundir/http_outbound_request_large_post");
         cmd1.arg("--jco-import");
diff --git a/tests/gen/http_outbound_request_post.component.wasm b/tests/gen/http_outbound_request_post.component.wasm
index a87851017..08f95520d 100644
Binary files a/tests/gen/http_outbound_request_post.component.wasm and b/tests/gen/http_outbound_request_post.component.wasm differ
diff --git a/tests/gen/http_outbound_request_post.rs b/tests/gen/http_outbound_request_post.rs
index 207510769..aa68ecaa6 100644
--- a/tests/gen/http_outbound_request_post.rs
+++ b/tests/gen/http_outbound_request_post.rs
@@ -12,7 +12,6 @@ fn http_outbound_request_post() -> anyhow::Result<()> {
         let mut cmd1 = Command::new("node");
         cmd1.arg("./src/jco.js");
         cmd1.arg("run");
-
         cmd1.arg("--jco-dir");
         cmd1.arg("./tests/rundir/http_outbound_request_post");
         cmd1.arg("--jco-import");
diff --git a/tests/gen/http_outbound_request_put.component.wasm b/tests/gen/http_outbound_request_put.component.wasm
index 8a9591470..2c8a0c8fb 100644
Binary files a/tests/gen/http_outbound_request_put.component.wasm and b/tests/gen/http_outbound_request_put.component.wasm differ
diff --git a/tests/gen/http_outbound_request_put.rs b/tests/gen/http_outbound_request_put.rs
index 03ec10f8a..3cb10a017 100644
--- a/tests/gen/http_outbound_request_put.rs
+++ b/tests/gen/http_outbound_request_put.rs
@@ -12,7 +12,6 @@ fn http_outbound_request_put() -> anyhow::Result<()> {
         let mut cmd1 = Command::new("node");
         cmd1.arg("./src/jco.js");
         cmd1.arg("run");
-
         cmd1.arg("--jco-dir");
         cmd1.arg("./tests/rundir/http_outbound_request_put");
         cmd1.arg("--jco-import");
diff --git a/tests/gen/http_outbound_request_response_build.component.wasm b/tests/gen/http_outbound_request_response_build.component.wasm
index 5123fce9a..9119ee36f 100644
Binary files a/tests/gen/http_outbound_request_response_build.component.wasm and b/tests/gen/http_outbound_request_response_build.component.wasm differ
diff --git a/tests/gen/http_outbound_request_response_build.rs b/tests/gen/http_outbound_request_response_build.rs
index 6be0e06e0..023ba16fd 100644
--- a/tests/gen/http_outbound_request_response_build.rs
+++ b/tests/gen/http_outbound_request_response_build.rs
@@ -12,7 +12,6 @@ fn http_outbound_request_response_build() -> anyhow::Result<()> {
         let mut cmd1 = Command::new("node");
         cmd1.arg("./src/jco.js");
         cmd1.arg("run");
-
         cmd1.arg("--jco-dir");
         cmd1.arg("./tests/rundir/http_outbound_request_response_build");
         cmd1.arg("--jco-import");
diff --git a/tests/gen/http_outbound_request_unknown_method.component.wasm b/tests/gen/http_outbound_request_unknown_method.component.wasm
index 4453d8dd9..4ff20b502 100644
Binary files a/tests/gen/http_outbound_request_unknown_method.component.wasm and b/tests/gen/http_outbound_request_unknown_method.component.wasm differ
diff --git a/tests/gen/http_outbound_request_unknown_method.rs b/tests/gen/http_outbound_request_unknown_method.rs
index 7d824d327..285febfa1 100644
--- a/tests/gen/http_outbound_request_unknown_method.rs
+++ b/tests/gen/http_outbound_request_unknown_method.rs
@@ -12,7 +12,6 @@ fn http_outbound_request_unknown_method() -> anyhow::Result<()> {
         let mut cmd1 = Command::new("node");
         cmd1.arg("./src/jco.js");
         cmd1.arg("run");
-
         cmd1.arg("--jco-dir");
         cmd1.arg("./tests/rundir/http_outbound_request_unknown_method");
         cmd1.arg("--jco-import");
diff --git a/tests/gen/http_outbound_request_unsupported_scheme.component.wasm b/tests/gen/http_outbound_request_unsupported_scheme.component.wasm
index 78f35d23c..0a8ee6885 100644
Binary files a/tests/gen/http_outbound_request_unsupported_scheme.component.wasm and b/tests/gen/http_outbound_request_unsupported_scheme.component.wasm differ
diff --git a/tests/gen/http_outbound_request_unsupported_scheme.rs b/tests/gen/http_outbound_request_unsupported_scheme.rs
index acde98543..230e165d2 100644
--- a/tests/gen/http_outbound_request_unsupported_scheme.rs
+++ b/tests/gen/http_outbound_request_unsupported_scheme.rs
@@ -12,7 +12,6 @@ fn http_outbound_request_unsupported_scheme() -> anyhow::Result<()> {
         let mut cmd1 = Command::new("node");
         cmd1.arg("./src/jco.js");
         cmd1.arg("run");
-
         cmd1.arg("--jco-dir");
         cmd1.arg("./tests/rundir/http_outbound_request_unsupported_scheme");
         cmd1.arg("--jco-import");
diff --git a/tests/gen/mod.rs b/tests/gen/mod.rs
index 294feb073..83f00a005 100644
--- a/tests/gen/mod.rs
+++ b/tests/gen/mod.rs
@@ -20,6 +20,15 @@ mod cli_no_udp;
 mod cli_splice_stdin;
 mod cli_stdin;
 mod cli_stdio_write_flushes;
+mod deno_api_reactor;
+mod deno_api_time;
+mod deno_cli_args;
+mod deno_cli_env;
+mod deno_cli_exit_default;
+mod deno_cli_exit_failure;
+mod deno_cli_exit_success;
+mod deno_preview1_big_random_buf;
+mod deno_preview2_random;
 mod http_outbound_request_content_length;
 mod http_outbound_request_get;
 mod http_outbound_request_invalid_dnsname;
diff --git a/tests/gen/piped_multiple.component.wasm b/tests/gen/piped_multiple.component.wasm
index ad9fdba67..2592779d4 100644
Binary files a/tests/gen/piped_multiple.component.wasm and b/tests/gen/piped_multiple.component.wasm differ
diff --git a/tests/gen/piped_multiple.rs b/tests/gen/piped_multiple.rs
index 892ba0ff5..afc87eb2b 100644
--- a/tests/gen/piped_multiple.rs
+++ b/tests/gen/piped_multiple.rs
@@ -12,7 +12,6 @@ fn piped_multiple() -> anyhow::Result<()> {
         let mut cmd1 = Command::new("node");
         cmd1.arg("./src/jco.js");
         cmd1.arg("run");
-
         cmd1.arg("--jco-dir");
         cmd1.arg("./tests/rundir/piped_multiple");
         cmd1.arg("--jco-import");
@@ -25,7 +24,6 @@ fn piped_multiple() -> anyhow::Result<()> {
         let mut cmd2 = Command::new("node");
         cmd2.arg("./src/jco.js");
         cmd2.arg("run");
-
         cmd2.arg("--jco-dir");
         cmd2.arg("./tests/rundir/piped_multiple_consumer");
         cmd2.arg("--jco-import");
diff --git a/tests/gen/piped_polling.component.wasm b/tests/gen/piped_polling.component.wasm
index cfb850c49..cec14dfa8 100644
Binary files a/tests/gen/piped_polling.component.wasm and b/tests/gen/piped_polling.component.wasm differ
diff --git a/tests/gen/piped_polling.rs b/tests/gen/piped_polling.rs
index 669915559..7f8e81c98 100644
--- a/tests/gen/piped_polling.rs
+++ b/tests/gen/piped_polling.rs
@@ -12,7 +12,6 @@ fn piped_polling() -> anyhow::Result<()> {
         let mut cmd1 = Command::new("node");
         cmd1.arg("./src/jco.js");
         cmd1.arg("run");
-
         cmd1.arg("--jco-dir");
         cmd1.arg("./tests/rundir/piped_polling");
         cmd1.arg("--jco-import");
@@ -25,7 +24,6 @@ fn piped_polling() -> anyhow::Result<()> {
         let mut cmd2 = Command::new("node");
         cmd2.arg("./src/jco.js");
         cmd2.arg("run");
-
         cmd2.arg("--jco-dir");
         cmd2.arg("./tests/rundir/piped_polling_consumer");
         cmd2.arg("--jco-import");
diff --git a/tests/gen/piped_simple.component.wasm b/tests/gen/piped_simple.component.wasm
index 1693508b2..8067d0fe3 100644
Binary files a/tests/gen/piped_simple.component.wasm and b/tests/gen/piped_simple.component.wasm differ
diff --git a/tests/gen/piped_simple.rs b/tests/gen/piped_simple.rs
index b00492982..e68b1199b 100644
--- a/tests/gen/piped_simple.rs
+++ b/tests/gen/piped_simple.rs
@@ -12,7 +12,6 @@ fn piped_simple() -> anyhow::Result<()> {
         let mut cmd1 = Command::new("node");
         cmd1.arg("./src/jco.js");
         cmd1.arg("run");
-
         cmd1.arg("--jco-dir");
         cmd1.arg("./tests/rundir/piped_simple");
         cmd1.arg("--jco-import");
@@ -25,7 +24,6 @@ fn piped_simple() -> anyhow::Result<()> {
         let mut cmd2 = Command::new("node");
         cmd2.arg("./src/jco.js");
         cmd2.arg("run");
-
         cmd2.arg("--jco-dir");
         cmd2.arg("./tests/rundir/piped_simple_consumer");
         cmd2.arg("--jco-import");
diff --git a/tests/gen/preview1_big_random_buf.component.wasm b/tests/gen/preview1_big_random_buf.component.wasm
index a91de4b12..d3354bcca 100644
Binary files a/tests/gen/preview1_big_random_buf.component.wasm and b/tests/gen/preview1_big_random_buf.component.wasm differ
diff --git a/tests/gen/preview1_big_random_buf.rs b/tests/gen/preview1_big_random_buf.rs
index 56f92550e..d0553a164 100644
--- a/tests/gen/preview1_big_random_buf.rs
+++ b/tests/gen/preview1_big_random_buf.rs
@@ -12,7 +12,6 @@ fn preview1_big_random_buf() -> anyhow::Result<()> {
         let mut cmd1 = Command::new("node");
         cmd1.arg("./src/jco.js");
         cmd1.arg("run");
-
         cmd1.arg("--jco-dir");
         cmd1.arg("./tests/rundir/preview1_big_random_buf");
         cmd1.arg("--jco-import");
diff --git a/tests/gen/preview1_clock_time_get.component.wasm b/tests/gen/preview1_clock_time_get.component.wasm
index 6ee805d0b..6ae0ea18b 100644
Binary files a/tests/gen/preview1_clock_time_get.component.wasm and b/tests/gen/preview1_clock_time_get.component.wasm differ
diff --git a/tests/gen/preview1_clock_time_get.rs b/tests/gen/preview1_clock_time_get.rs
index 8fb890ac4..357b11b1f 100644
--- a/tests/gen/preview1_clock_time_get.rs
+++ b/tests/gen/preview1_clock_time_get.rs
@@ -12,7 +12,6 @@ fn preview1_clock_time_get() -> anyhow::Result<()> {
         let mut cmd1 = Command::new("node");
         cmd1.arg("./src/jco.js");
         cmd1.arg("run");
-
         cmd1.arg("--jco-dir");
         cmd1.arg("./tests/rundir/preview1_clock_time_get");
         cmd1.arg("--jco-import");
diff --git a/tests/gen/preview1_close_preopen.component.wasm b/tests/gen/preview1_close_preopen.component.wasm
index 1cdebc0e0..828299b52 100644
Binary files a/tests/gen/preview1_close_preopen.component.wasm and b/tests/gen/preview1_close_preopen.component.wasm differ
diff --git a/tests/gen/preview1_close_preopen.rs b/tests/gen/preview1_close_preopen.rs
index f593838ed..791f2a9d9 100644
--- a/tests/gen/preview1_close_preopen.rs
+++ b/tests/gen/preview1_close_preopen.rs
@@ -12,7 +12,6 @@ fn preview1_close_preopen() -> anyhow::Result<()> {
         let mut cmd1 = Command::new("node");
         cmd1.arg("./src/jco.js");
         cmd1.arg("run");
-
         cmd1.arg("--jco-dir");
         cmd1.arg("./tests/rundir/preview1_close_preopen");
         cmd1.arg("--jco-import");
diff --git a/tests/gen/preview1_dangling_fd.component.wasm b/tests/gen/preview1_dangling_fd.component.wasm
index 0301a3a54..c6577f51c 100644
Binary files a/tests/gen/preview1_dangling_fd.component.wasm and b/tests/gen/preview1_dangling_fd.component.wasm differ
diff --git a/tests/gen/preview1_dangling_fd.rs b/tests/gen/preview1_dangling_fd.rs
index 6a101805b..e84a97522 100644
--- a/tests/gen/preview1_dangling_fd.rs
+++ b/tests/gen/preview1_dangling_fd.rs
@@ -12,7 +12,6 @@ fn preview1_dangling_fd() -> anyhow::Result<()> {
         let mut cmd1 = Command::new("node");
         cmd1.arg("./src/jco.js");
         cmd1.arg("run");
-
         cmd1.arg("--jco-dir");
         cmd1.arg("./tests/rundir/preview1_dangling_fd");
         cmd1.arg("--jco-import");
diff --git a/tests/gen/preview1_dangling_symlink.component.wasm b/tests/gen/preview1_dangling_symlink.component.wasm
index 8161c8456..af57db7ec 100644
Binary files a/tests/gen/preview1_dangling_symlink.component.wasm and b/tests/gen/preview1_dangling_symlink.component.wasm differ
diff --git a/tests/gen/preview1_dangling_symlink.rs b/tests/gen/preview1_dangling_symlink.rs
index 6c5d878ed..33fe6ece9 100644
--- a/tests/gen/preview1_dangling_symlink.rs
+++ b/tests/gen/preview1_dangling_symlink.rs
@@ -12,7 +12,6 @@ fn preview1_dangling_symlink() -> anyhow::Result<()> {
         let mut cmd1 = Command::new("node");
         cmd1.arg("./src/jco.js");
         cmd1.arg("run");
-
         cmd1.arg("--jco-dir");
         cmd1.arg("./tests/rundir/preview1_dangling_symlink");
         cmd1.arg("--jco-import");
diff --git a/tests/gen/preview1_dir_fd_op_failures.component.wasm b/tests/gen/preview1_dir_fd_op_failures.component.wasm
index 074656d2d..36a1a74f7 100644
Binary files a/tests/gen/preview1_dir_fd_op_failures.component.wasm and b/tests/gen/preview1_dir_fd_op_failures.component.wasm differ
diff --git a/tests/gen/preview1_dir_fd_op_failures.rs b/tests/gen/preview1_dir_fd_op_failures.rs
index b6d3522ba..b8f4e474a 100644
--- a/tests/gen/preview1_dir_fd_op_failures.rs
+++ b/tests/gen/preview1_dir_fd_op_failures.rs
@@ -12,7 +12,6 @@ fn preview1_dir_fd_op_failures() -> anyhow::Result<()> {
         let mut cmd1 = Command::new("node");
         cmd1.arg("./src/jco.js");
         cmd1.arg("run");
-
         cmd1.arg("--jco-dir");
         cmd1.arg("./tests/rundir/preview1_dir_fd_op_failures");
         cmd1.arg("--jco-import");
diff --git a/tests/gen/preview1_directory_seek.component.wasm b/tests/gen/preview1_directory_seek.component.wasm
index daa6b5578..45f7784df 100644
Binary files a/tests/gen/preview1_directory_seek.component.wasm and b/tests/gen/preview1_directory_seek.component.wasm differ
diff --git a/tests/gen/preview1_directory_seek.rs b/tests/gen/preview1_directory_seek.rs
index d8fbce3a6..c1dc56bf9 100644
--- a/tests/gen/preview1_directory_seek.rs
+++ b/tests/gen/preview1_directory_seek.rs
@@ -12,7 +12,6 @@ fn preview1_directory_seek() -> anyhow::Result<()> {
         let mut cmd1 = Command::new("node");
         cmd1.arg("./src/jco.js");
         cmd1.arg("run");
-
         cmd1.arg("--jco-dir");
         cmd1.arg("./tests/rundir/preview1_directory_seek");
         cmd1.arg("--jco-import");
diff --git a/tests/gen/preview1_fd_advise.component.wasm b/tests/gen/preview1_fd_advise.component.wasm
index 89c7fd353..6f1f0c9da 100644
Binary files a/tests/gen/preview1_fd_advise.component.wasm and b/tests/gen/preview1_fd_advise.component.wasm differ
diff --git a/tests/gen/preview1_fd_advise.rs b/tests/gen/preview1_fd_advise.rs
index 58f530958..4f5abe39a 100644
--- a/tests/gen/preview1_fd_advise.rs
+++ b/tests/gen/preview1_fd_advise.rs
@@ -12,7 +12,6 @@ fn preview1_fd_advise() -> anyhow::Result<()> {
         let mut cmd1 = Command::new("node");
         cmd1.arg("./src/jco.js");
         cmd1.arg("run");
-
         cmd1.arg("--jco-dir");
         cmd1.arg("./tests/rundir/preview1_fd_advise");
         cmd1.arg("--jco-import");
diff --git a/tests/gen/preview1_fd_filestat_get.component.wasm b/tests/gen/preview1_fd_filestat_get.component.wasm
index 6726c0395..c237287d8 100644
Binary files a/tests/gen/preview1_fd_filestat_get.component.wasm and b/tests/gen/preview1_fd_filestat_get.component.wasm differ
diff --git a/tests/gen/preview1_fd_filestat_get.rs b/tests/gen/preview1_fd_filestat_get.rs
index 27c1fb0d0..8836d5e2c 100644
--- a/tests/gen/preview1_fd_filestat_get.rs
+++ b/tests/gen/preview1_fd_filestat_get.rs
@@ -12,7 +12,6 @@ fn preview1_fd_filestat_get() -> anyhow::Result<()> {
         let mut cmd1 = Command::new("node");
         cmd1.arg("./src/jco.js");
         cmd1.arg("run");
-
         cmd1.arg("--jco-dir");
         cmd1.arg("./tests/rundir/preview1_fd_filestat_get");
         cmd1.arg("--jco-import");
diff --git a/tests/gen/preview1_fd_filestat_set.component.wasm b/tests/gen/preview1_fd_filestat_set.component.wasm
index be9a89726..7a88f2047 100644
Binary files a/tests/gen/preview1_fd_filestat_set.component.wasm and b/tests/gen/preview1_fd_filestat_set.component.wasm differ
diff --git a/tests/gen/preview1_fd_filestat_set.rs b/tests/gen/preview1_fd_filestat_set.rs
index 7c3c331f1..85e56fe40 100644
--- a/tests/gen/preview1_fd_filestat_set.rs
+++ b/tests/gen/preview1_fd_filestat_set.rs
@@ -12,7 +12,6 @@ fn preview1_fd_filestat_set() -> anyhow::Result<()> {
         let mut cmd1 = Command::new("node");
         cmd1.arg("./src/jco.js");
         cmd1.arg("run");
-
         cmd1.arg("--jco-dir");
         cmd1.arg("./tests/rundir/preview1_fd_filestat_set");
         cmd1.arg("--jco-import");
diff --git a/tests/gen/preview1_fd_flags_set.component.wasm b/tests/gen/preview1_fd_flags_set.component.wasm
index d66c23a5d..bad26b409 100644
Binary files a/tests/gen/preview1_fd_flags_set.component.wasm and b/tests/gen/preview1_fd_flags_set.component.wasm differ
diff --git a/tests/gen/preview1_fd_flags_set.rs b/tests/gen/preview1_fd_flags_set.rs
index 9c6f149ba..929d98e34 100644
--- a/tests/gen/preview1_fd_flags_set.rs
+++ b/tests/gen/preview1_fd_flags_set.rs
@@ -12,7 +12,6 @@ fn preview1_fd_flags_set() -> anyhow::Result<()> {
         let mut cmd1 = Command::new("node");
         cmd1.arg("./src/jco.js");
         cmd1.arg("run");
-
         cmd1.arg("--jco-dir");
         cmd1.arg("./tests/rundir/preview1_fd_flags_set");
         cmd1.arg("--jco-import");
diff --git a/tests/gen/preview1_fd_readdir.component.wasm b/tests/gen/preview1_fd_readdir.component.wasm
index ffb3867f5..4b62b1d68 100644
Binary files a/tests/gen/preview1_fd_readdir.component.wasm and b/tests/gen/preview1_fd_readdir.component.wasm differ
diff --git a/tests/gen/preview1_fd_readdir.rs b/tests/gen/preview1_fd_readdir.rs
index 124692f00..71bbcc04e 100644
--- a/tests/gen/preview1_fd_readdir.rs
+++ b/tests/gen/preview1_fd_readdir.rs
@@ -12,7 +12,6 @@ fn preview1_fd_readdir() -> anyhow::Result<()> {
         let mut cmd1 = Command::new("node");
         cmd1.arg("./src/jco.js");
         cmd1.arg("run");
-
         cmd1.arg("--jco-dir");
         cmd1.arg("./tests/rundir/preview1_fd_readdir");
         cmd1.arg("--jco-import");
diff --git a/tests/gen/preview1_file_allocate.component.wasm b/tests/gen/preview1_file_allocate.component.wasm
index 39bd7f84f..93dfaf5e8 100644
Binary files a/tests/gen/preview1_file_allocate.component.wasm and b/tests/gen/preview1_file_allocate.component.wasm differ
diff --git a/tests/gen/preview1_file_allocate.rs b/tests/gen/preview1_file_allocate.rs
index 73115828c..304d38ec9 100644
--- a/tests/gen/preview1_file_allocate.rs
+++ b/tests/gen/preview1_file_allocate.rs
@@ -12,7 +12,6 @@ fn preview1_file_allocate() -> anyhow::Result<()> {
         let mut cmd1 = Command::new("node");
         cmd1.arg("./src/jco.js");
         cmd1.arg("run");
-
         cmd1.arg("--jco-dir");
         cmd1.arg("./tests/rundir/preview1_file_allocate");
         cmd1.arg("--jco-import");
diff --git a/tests/gen/preview1_file_pread_pwrite.component.wasm b/tests/gen/preview1_file_pread_pwrite.component.wasm
index ab6ab6c31..91044ff00 100644
Binary files a/tests/gen/preview1_file_pread_pwrite.component.wasm and b/tests/gen/preview1_file_pread_pwrite.component.wasm differ
diff --git a/tests/gen/preview1_file_pread_pwrite.rs b/tests/gen/preview1_file_pread_pwrite.rs
index 3b59e4c8e..f95f54414 100644
--- a/tests/gen/preview1_file_pread_pwrite.rs
+++ b/tests/gen/preview1_file_pread_pwrite.rs
@@ -12,7 +12,6 @@ fn preview1_file_pread_pwrite() -> anyhow::Result<()> {
         let mut cmd1 = Command::new("node");
         cmd1.arg("./src/jco.js");
         cmd1.arg("run");
-
         cmd1.arg("--jco-dir");
         cmd1.arg("./tests/rundir/preview1_file_pread_pwrite");
         cmd1.arg("--jco-import");
diff --git a/tests/gen/preview1_file_seek_tell.component.wasm b/tests/gen/preview1_file_seek_tell.component.wasm
index fb8c52fd3..b37dcf233 100644
Binary files a/tests/gen/preview1_file_seek_tell.component.wasm and b/tests/gen/preview1_file_seek_tell.component.wasm differ
diff --git a/tests/gen/preview1_file_seek_tell.rs b/tests/gen/preview1_file_seek_tell.rs
index b8901df2c..f4943e4f9 100644
--- a/tests/gen/preview1_file_seek_tell.rs
+++ b/tests/gen/preview1_file_seek_tell.rs
@@ -12,7 +12,6 @@ fn preview1_file_seek_tell() -> anyhow::Result<()> {
         let mut cmd1 = Command::new("node");
         cmd1.arg("./src/jco.js");
         cmd1.arg("run");
-
         cmd1.arg("--jco-dir");
         cmd1.arg("./tests/rundir/preview1_file_seek_tell");
         cmd1.arg("--jco-import");
diff --git a/tests/gen/preview1_file_truncation.component.wasm b/tests/gen/preview1_file_truncation.component.wasm
index 1972d4234..daf5c5fbe 100644
Binary files a/tests/gen/preview1_file_truncation.component.wasm and b/tests/gen/preview1_file_truncation.component.wasm differ
diff --git a/tests/gen/preview1_file_truncation.rs b/tests/gen/preview1_file_truncation.rs
index 17c277150..5c406a6c1 100644
--- a/tests/gen/preview1_file_truncation.rs
+++ b/tests/gen/preview1_file_truncation.rs
@@ -12,7 +12,6 @@ fn preview1_file_truncation() -> anyhow::Result<()> {
         let mut cmd1 = Command::new("node");
         cmd1.arg("./src/jco.js");
         cmd1.arg("run");
-
         cmd1.arg("--jco-dir");
         cmd1.arg("./tests/rundir/preview1_file_truncation");
         cmd1.arg("--jco-import");
diff --git a/tests/gen/preview1_file_unbuffered_write.component.wasm b/tests/gen/preview1_file_unbuffered_write.component.wasm
index afb50e4d0..ada022e52 100644
Binary files a/tests/gen/preview1_file_unbuffered_write.component.wasm and b/tests/gen/preview1_file_unbuffered_write.component.wasm differ
diff --git a/tests/gen/preview1_file_unbuffered_write.rs b/tests/gen/preview1_file_unbuffered_write.rs
index 32648ef76..393532eff 100644
--- a/tests/gen/preview1_file_unbuffered_write.rs
+++ b/tests/gen/preview1_file_unbuffered_write.rs
@@ -12,7 +12,6 @@ fn preview1_file_unbuffered_write() -> anyhow::Result<()> {
         let mut cmd1 = Command::new("node");
         cmd1.arg("./src/jco.js");
         cmd1.arg("run");
-
         cmd1.arg("--jco-dir");
         cmd1.arg("./tests/rundir/preview1_file_unbuffered_write");
         cmd1.arg("--jco-import");
diff --git a/tests/gen/preview1_file_write.component.wasm b/tests/gen/preview1_file_write.component.wasm
index 134d8380b..477dd50a8 100644
Binary files a/tests/gen/preview1_file_write.component.wasm and b/tests/gen/preview1_file_write.component.wasm differ
diff --git a/tests/gen/preview1_file_write.rs b/tests/gen/preview1_file_write.rs
index e93d25d4b..6ac602a98 100644
--- a/tests/gen/preview1_file_write.rs
+++ b/tests/gen/preview1_file_write.rs
@@ -12,7 +12,6 @@ fn preview1_file_write() -> anyhow::Result<()> {
         let mut cmd1 = Command::new("node");
         cmd1.arg("./src/jco.js");
         cmd1.arg("run");
-
         cmd1.arg("--jco-dir");
         cmd1.arg("./tests/rundir/preview1_file_write");
         cmd1.arg("--jco-import");
diff --git a/tests/gen/preview1_interesting_paths.component.wasm b/tests/gen/preview1_interesting_paths.component.wasm
index 08ed171ff..d4fec3d4e 100644
Binary files a/tests/gen/preview1_interesting_paths.component.wasm and b/tests/gen/preview1_interesting_paths.component.wasm differ
diff --git a/tests/gen/preview1_interesting_paths.rs b/tests/gen/preview1_interesting_paths.rs
index 8da273af5..4be1aaec9 100644
--- a/tests/gen/preview1_interesting_paths.rs
+++ b/tests/gen/preview1_interesting_paths.rs
@@ -12,7 +12,6 @@ fn preview1_interesting_paths() -> anyhow::Result<()> {
         let mut cmd1 = Command::new("node");
         cmd1.arg("./src/jco.js");
         cmd1.arg("run");
-
         cmd1.arg("--jco-dir");
         cmd1.arg("./tests/rundir/preview1_interesting_paths");
         cmd1.arg("--jco-import");
diff --git a/tests/gen/preview1_nofollow_errors.component.wasm b/tests/gen/preview1_nofollow_errors.component.wasm
index b29af526c..d997fce46 100644
Binary files a/tests/gen/preview1_nofollow_errors.component.wasm and b/tests/gen/preview1_nofollow_errors.component.wasm differ
diff --git a/tests/gen/preview1_nofollow_errors.rs b/tests/gen/preview1_nofollow_errors.rs
index 35c279803..c5ac13b78 100644
--- a/tests/gen/preview1_nofollow_errors.rs
+++ b/tests/gen/preview1_nofollow_errors.rs
@@ -12,7 +12,6 @@ fn preview1_nofollow_errors() -> anyhow::Result<()> {
         let mut cmd1 = Command::new("node");
         cmd1.arg("./src/jco.js");
         cmd1.arg("run");
-
         cmd1.arg("--jco-dir");
         cmd1.arg("./tests/rundir/preview1_nofollow_errors");
         cmd1.arg("--jco-import");
diff --git a/tests/gen/preview1_overwrite_preopen.component.wasm b/tests/gen/preview1_overwrite_preopen.component.wasm
index 20d0018b7..eec57fe3a 100644
Binary files a/tests/gen/preview1_overwrite_preopen.component.wasm and b/tests/gen/preview1_overwrite_preopen.component.wasm differ
diff --git a/tests/gen/preview1_overwrite_preopen.rs b/tests/gen/preview1_overwrite_preopen.rs
index 6bd28f319..76509bb0b 100644
--- a/tests/gen/preview1_overwrite_preopen.rs
+++ b/tests/gen/preview1_overwrite_preopen.rs
@@ -12,7 +12,6 @@ fn preview1_overwrite_preopen() -> anyhow::Result<()> {
         let mut cmd1 = Command::new("node");
         cmd1.arg("./src/jco.js");
         cmd1.arg("run");
-
         cmd1.arg("--jco-dir");
         cmd1.arg("./tests/rundir/preview1_overwrite_preopen");
         cmd1.arg("--jco-import");
diff --git a/tests/gen/preview1_path_exists.component.wasm b/tests/gen/preview1_path_exists.component.wasm
index 239fb0f5b..cceb8efb8 100644
Binary files a/tests/gen/preview1_path_exists.component.wasm and b/tests/gen/preview1_path_exists.component.wasm differ
diff --git a/tests/gen/preview1_path_exists.rs b/tests/gen/preview1_path_exists.rs
index a3c2a21e9..81e874afc 100644
--- a/tests/gen/preview1_path_exists.rs
+++ b/tests/gen/preview1_path_exists.rs
@@ -12,7 +12,6 @@ fn preview1_path_exists() -> anyhow::Result<()> {
         let mut cmd1 = Command::new("node");
         cmd1.arg("./src/jco.js");
         cmd1.arg("run");
-
         cmd1.arg("--jco-dir");
         cmd1.arg("./tests/rundir/preview1_path_exists");
         cmd1.arg("--jco-import");
diff --git a/tests/gen/preview1_path_filestat.component.wasm b/tests/gen/preview1_path_filestat.component.wasm
index fb226c36c..2ffd8a8f9 100644
Binary files a/tests/gen/preview1_path_filestat.component.wasm and b/tests/gen/preview1_path_filestat.component.wasm differ
diff --git a/tests/gen/preview1_path_filestat.rs b/tests/gen/preview1_path_filestat.rs
index cb8ce327a..44b6d7adb 100644
--- a/tests/gen/preview1_path_filestat.rs
+++ b/tests/gen/preview1_path_filestat.rs
@@ -12,7 +12,6 @@ fn preview1_path_filestat() -> anyhow::Result<()> {
         let mut cmd1 = Command::new("node");
         cmd1.arg("./src/jco.js");
         cmd1.arg("run");
-
         cmd1.arg("--jco-dir");
         cmd1.arg("./tests/rundir/preview1_path_filestat");
         cmd1.arg("--jco-import");
diff --git a/tests/gen/preview1_path_link.component.wasm b/tests/gen/preview1_path_link.component.wasm
index 0429e2900..c079a9cc8 100644
Binary files a/tests/gen/preview1_path_link.component.wasm and b/tests/gen/preview1_path_link.component.wasm differ
diff --git a/tests/gen/preview1_path_link.rs b/tests/gen/preview1_path_link.rs
index ff286fa61..8524d4404 100644
--- a/tests/gen/preview1_path_link.rs
+++ b/tests/gen/preview1_path_link.rs
@@ -12,7 +12,6 @@ fn preview1_path_link() -> anyhow::Result<()> {
         let mut cmd1 = Command::new("node");
         cmd1.arg("./src/jco.js");
         cmd1.arg("run");
-
         cmd1.arg("--jco-dir");
         cmd1.arg("./tests/rundir/preview1_path_link");
         cmd1.arg("--jco-import");
diff --git a/tests/gen/preview1_path_open_create_existing.component.wasm b/tests/gen/preview1_path_open_create_existing.component.wasm
index 30f641403..d56a10e8f 100644
Binary files a/tests/gen/preview1_path_open_create_existing.component.wasm and b/tests/gen/preview1_path_open_create_existing.component.wasm differ
diff --git a/tests/gen/preview1_path_open_create_existing.rs b/tests/gen/preview1_path_open_create_existing.rs
index 06e8bf4b9..ee85679ad 100644
--- a/tests/gen/preview1_path_open_create_existing.rs
+++ b/tests/gen/preview1_path_open_create_existing.rs
@@ -12,7 +12,6 @@ fn preview1_path_open_create_existing() -> anyhow::Result<()> {
         let mut cmd1 = Command::new("node");
         cmd1.arg("./src/jco.js");
         cmd1.arg("run");
-
         cmd1.arg("--jco-dir");
         cmd1.arg("./tests/rundir/preview1_path_open_create_existing");
         cmd1.arg("--jco-import");
diff --git a/tests/gen/preview1_path_open_dirfd_not_dir.component.wasm b/tests/gen/preview1_path_open_dirfd_not_dir.component.wasm
index 179a026d5..41743c7de 100644
Binary files a/tests/gen/preview1_path_open_dirfd_not_dir.component.wasm and b/tests/gen/preview1_path_open_dirfd_not_dir.component.wasm differ
diff --git a/tests/gen/preview1_path_open_dirfd_not_dir.rs b/tests/gen/preview1_path_open_dirfd_not_dir.rs
index d1a5e5eb7..648564711 100644
--- a/tests/gen/preview1_path_open_dirfd_not_dir.rs
+++ b/tests/gen/preview1_path_open_dirfd_not_dir.rs
@@ -12,7 +12,6 @@ fn preview1_path_open_dirfd_not_dir() -> anyhow::Result<()> {
         let mut cmd1 = Command::new("node");
         cmd1.arg("./src/jco.js");
         cmd1.arg("run");
-
         cmd1.arg("--jco-dir");
         cmd1.arg("./tests/rundir/preview1_path_open_dirfd_not_dir");
         cmd1.arg("--jco-import");
diff --git a/tests/gen/preview1_path_open_lots.component.wasm b/tests/gen/preview1_path_open_lots.component.wasm
index 91251691b..f1d6301cb 100644
Binary files a/tests/gen/preview1_path_open_lots.component.wasm and b/tests/gen/preview1_path_open_lots.component.wasm differ
diff --git a/tests/gen/preview1_path_open_lots.rs b/tests/gen/preview1_path_open_lots.rs
index 8a250a757..13662dbe2 100644
--- a/tests/gen/preview1_path_open_lots.rs
+++ b/tests/gen/preview1_path_open_lots.rs
@@ -12,7 +12,6 @@ fn preview1_path_open_lots() -> anyhow::Result<()> {
         let mut cmd1 = Command::new("node");
         cmd1.arg("./src/jco.js");
         cmd1.arg("run");
-
         cmd1.arg("--jco-dir");
         cmd1.arg("./tests/rundir/preview1_path_open_lots");
         cmd1.arg("--jco-import");
diff --git a/tests/gen/preview1_path_open_missing.component.wasm b/tests/gen/preview1_path_open_missing.component.wasm
index 594f8f10d..a819fb2cd 100644
Binary files a/tests/gen/preview1_path_open_missing.component.wasm and b/tests/gen/preview1_path_open_missing.component.wasm differ
diff --git a/tests/gen/preview1_path_open_missing.rs b/tests/gen/preview1_path_open_missing.rs
index fe36126fa..8f0e2e187 100644
--- a/tests/gen/preview1_path_open_missing.rs
+++ b/tests/gen/preview1_path_open_missing.rs
@@ -12,7 +12,6 @@ fn preview1_path_open_missing() -> anyhow::Result<()> {
         let mut cmd1 = Command::new("node");
         cmd1.arg("./src/jco.js");
         cmd1.arg("run");
-
         cmd1.arg("--jco-dir");
         cmd1.arg("./tests/rundir/preview1_path_open_missing");
         cmd1.arg("--jco-import");
diff --git a/tests/gen/preview1_path_open_nonblock.component.wasm b/tests/gen/preview1_path_open_nonblock.component.wasm
index f30588fd1..73dc746a8 100644
Binary files a/tests/gen/preview1_path_open_nonblock.component.wasm and b/tests/gen/preview1_path_open_nonblock.component.wasm differ
diff --git a/tests/gen/preview1_path_open_nonblock.rs b/tests/gen/preview1_path_open_nonblock.rs
index 3191a616f..350a64cd3 100644
--- a/tests/gen/preview1_path_open_nonblock.rs
+++ b/tests/gen/preview1_path_open_nonblock.rs
@@ -12,7 +12,6 @@ fn preview1_path_open_nonblock() -> anyhow::Result<()> {
         let mut cmd1 = Command::new("node");
         cmd1.arg("./src/jco.js");
         cmd1.arg("run");
-
         cmd1.arg("--jco-dir");
         cmd1.arg("./tests/rundir/preview1_path_open_nonblock");
         cmd1.arg("--jco-import");
diff --git a/tests/gen/preview1_path_open_preopen.component.wasm b/tests/gen/preview1_path_open_preopen.component.wasm
index 87f4c6c5e..407d7051f 100644
Binary files a/tests/gen/preview1_path_open_preopen.component.wasm and b/tests/gen/preview1_path_open_preopen.component.wasm differ
diff --git a/tests/gen/preview1_path_open_preopen.rs b/tests/gen/preview1_path_open_preopen.rs
index 21620be62..6e1d422d8 100644
--- a/tests/gen/preview1_path_open_preopen.rs
+++ b/tests/gen/preview1_path_open_preopen.rs
@@ -12,7 +12,6 @@ fn preview1_path_open_preopen() -> anyhow::Result<()> {
         let mut cmd1 = Command::new("node");
         cmd1.arg("./src/jco.js");
         cmd1.arg("run");
-
         cmd1.arg("--jco-dir");
         cmd1.arg("./tests/rundir/preview1_path_open_preopen");
         cmd1.arg("--jco-import");
diff --git a/tests/gen/preview1_path_open_read_write.component.wasm b/tests/gen/preview1_path_open_read_write.component.wasm
index 876ec6454..4714425c1 100644
Binary files a/tests/gen/preview1_path_open_read_write.component.wasm and b/tests/gen/preview1_path_open_read_write.component.wasm differ
diff --git a/tests/gen/preview1_path_open_read_write.rs b/tests/gen/preview1_path_open_read_write.rs
index cc8322a13..d7ffd6182 100644
--- a/tests/gen/preview1_path_open_read_write.rs
+++ b/tests/gen/preview1_path_open_read_write.rs
@@ -12,7 +12,6 @@ fn preview1_path_open_read_write() -> anyhow::Result<()> {
         let mut cmd1 = Command::new("node");
         cmd1.arg("./src/jco.js");
         cmd1.arg("run");
-
         cmd1.arg("--jco-dir");
         cmd1.arg("./tests/rundir/preview1_path_open_read_write");
         cmd1.arg("--jco-import");
diff --git a/tests/gen/preview1_path_rename.component.wasm b/tests/gen/preview1_path_rename.component.wasm
index 5cbd4624e..ff4dbfce3 100644
Binary files a/tests/gen/preview1_path_rename.component.wasm and b/tests/gen/preview1_path_rename.component.wasm differ
diff --git a/tests/gen/preview1_path_rename.rs b/tests/gen/preview1_path_rename.rs
index f81d4a797..f2a64f724 100644
--- a/tests/gen/preview1_path_rename.rs
+++ b/tests/gen/preview1_path_rename.rs
@@ -12,7 +12,6 @@ fn preview1_path_rename() -> anyhow::Result<()> {
         let mut cmd1 = Command::new("node");
         cmd1.arg("./src/jco.js");
         cmd1.arg("run");
-
         cmd1.arg("--jco-dir");
         cmd1.arg("./tests/rundir/preview1_path_rename");
         cmd1.arg("--jco-import");
diff --git a/tests/gen/preview1_path_rename_dir_trailing_slashes.component.wasm b/tests/gen/preview1_path_rename_dir_trailing_slashes.component.wasm
index cc05a69f3..63c604120 100644
Binary files a/tests/gen/preview1_path_rename_dir_trailing_slashes.component.wasm and b/tests/gen/preview1_path_rename_dir_trailing_slashes.component.wasm differ
diff --git a/tests/gen/preview1_path_rename_dir_trailing_slashes.rs b/tests/gen/preview1_path_rename_dir_trailing_slashes.rs
index eb97b34f4..ccaca468c 100644
--- a/tests/gen/preview1_path_rename_dir_trailing_slashes.rs
+++ b/tests/gen/preview1_path_rename_dir_trailing_slashes.rs
@@ -12,7 +12,6 @@ fn preview1_path_rename_dir_trailing_slashes() -> anyhow::Result<()> {
         let mut cmd1 = Command::new("node");
         cmd1.arg("./src/jco.js");
         cmd1.arg("run");
-
         cmd1.arg("--jco-dir");
         cmd1.arg("./tests/rundir/preview1_path_rename_dir_trailing_slashes");
         cmd1.arg("--jco-import");
diff --git a/tests/gen/preview1_path_symlink_trailing_slashes.component.wasm b/tests/gen/preview1_path_symlink_trailing_slashes.component.wasm
index 47b481ae5..89e887027 100644
Binary files a/tests/gen/preview1_path_symlink_trailing_slashes.component.wasm and b/tests/gen/preview1_path_symlink_trailing_slashes.component.wasm differ
diff --git a/tests/gen/preview1_path_symlink_trailing_slashes.rs b/tests/gen/preview1_path_symlink_trailing_slashes.rs
index 2fc29d65c..a3b41bf13 100644
--- a/tests/gen/preview1_path_symlink_trailing_slashes.rs
+++ b/tests/gen/preview1_path_symlink_trailing_slashes.rs
@@ -12,7 +12,6 @@ fn preview1_path_symlink_trailing_slashes() -> anyhow::Result<()> {
         let mut cmd1 = Command::new("node");
         cmd1.arg("./src/jco.js");
         cmd1.arg("run");
-
         cmd1.arg("--jco-dir");
         cmd1.arg("./tests/rundir/preview1_path_symlink_trailing_slashes");
         cmd1.arg("--jco-import");
diff --git a/tests/gen/preview1_poll_oneoff_files.component.wasm b/tests/gen/preview1_poll_oneoff_files.component.wasm
index a7c9cd0f4..4c54e9eaa 100644
Binary files a/tests/gen/preview1_poll_oneoff_files.component.wasm and b/tests/gen/preview1_poll_oneoff_files.component.wasm differ
diff --git a/tests/gen/preview1_poll_oneoff_files.rs b/tests/gen/preview1_poll_oneoff_files.rs
index a73cb5b14..874d94344 100644
--- a/tests/gen/preview1_poll_oneoff_files.rs
+++ b/tests/gen/preview1_poll_oneoff_files.rs
@@ -12,7 +12,6 @@ fn preview1_poll_oneoff_files() -> anyhow::Result<()> {
         let mut cmd1 = Command::new("node");
         cmd1.arg("./src/jco.js");
         cmd1.arg("run");
-
         cmd1.arg("--jco-dir");
         cmd1.arg("./tests/rundir/preview1_poll_oneoff_files");
         cmd1.arg("--jco-import");
diff --git a/tests/gen/preview1_poll_oneoff_stdio.component.wasm b/tests/gen/preview1_poll_oneoff_stdio.component.wasm
index 4cd184ac2..638ac4d60 100644
Binary files a/tests/gen/preview1_poll_oneoff_stdio.component.wasm and b/tests/gen/preview1_poll_oneoff_stdio.component.wasm differ
diff --git a/tests/gen/preview1_poll_oneoff_stdio.rs b/tests/gen/preview1_poll_oneoff_stdio.rs
index 7a342c6ca..b76030478 100644
--- a/tests/gen/preview1_poll_oneoff_stdio.rs
+++ b/tests/gen/preview1_poll_oneoff_stdio.rs
@@ -12,7 +12,6 @@ fn preview1_poll_oneoff_stdio() -> anyhow::Result<()> {
         let mut cmd1 = Command::new("node");
         cmd1.arg("./src/jco.js");
         cmd1.arg("run");
-
         cmd1.arg("--jco-dir");
         cmd1.arg("./tests/rundir/preview1_poll_oneoff_stdio");
         cmd1.arg("--jco-import");
diff --git a/tests/gen/preview1_readlink.component.wasm b/tests/gen/preview1_readlink.component.wasm
index 6c6773628..dcdd1bb8f 100644
Binary files a/tests/gen/preview1_readlink.component.wasm and b/tests/gen/preview1_readlink.component.wasm differ
diff --git a/tests/gen/preview1_readlink.rs b/tests/gen/preview1_readlink.rs
index 0a4856b7c..ce5b4bb64 100644
--- a/tests/gen/preview1_readlink.rs
+++ b/tests/gen/preview1_readlink.rs
@@ -12,7 +12,6 @@ fn preview1_readlink() -> anyhow::Result<()> {
         let mut cmd1 = Command::new("node");
         cmd1.arg("./src/jco.js");
         cmd1.arg("run");
-
         cmd1.arg("--jco-dir");
         cmd1.arg("./tests/rundir/preview1_readlink");
         cmd1.arg("--jco-import");
diff --git a/tests/gen/preview1_regular_file_isatty.component.wasm b/tests/gen/preview1_regular_file_isatty.component.wasm
index 9cd4127c5..544a498c0 100644
Binary files a/tests/gen/preview1_regular_file_isatty.component.wasm and b/tests/gen/preview1_regular_file_isatty.component.wasm differ
diff --git a/tests/gen/preview1_regular_file_isatty.rs b/tests/gen/preview1_regular_file_isatty.rs
index 44d9416c9..191d08759 100644
--- a/tests/gen/preview1_regular_file_isatty.rs
+++ b/tests/gen/preview1_regular_file_isatty.rs
@@ -12,7 +12,6 @@ fn preview1_regular_file_isatty() -> anyhow::Result<()> {
         let mut cmd1 = Command::new("node");
         cmd1.arg("./src/jco.js");
         cmd1.arg("run");
-
         cmd1.arg("--jco-dir");
         cmd1.arg("./tests/rundir/preview1_regular_file_isatty");
         cmd1.arg("--jco-import");
diff --git a/tests/gen/preview1_remove_directory.component.wasm b/tests/gen/preview1_remove_directory.component.wasm
index 90e627be8..704ac910e 100644
Binary files a/tests/gen/preview1_remove_directory.component.wasm and b/tests/gen/preview1_remove_directory.component.wasm differ
diff --git a/tests/gen/preview1_remove_directory.rs b/tests/gen/preview1_remove_directory.rs
index 19907fd2e..6568466e1 100644
--- a/tests/gen/preview1_remove_directory.rs
+++ b/tests/gen/preview1_remove_directory.rs
@@ -12,7 +12,6 @@ fn preview1_remove_directory() -> anyhow::Result<()> {
         let mut cmd1 = Command::new("node");
         cmd1.arg("./src/jco.js");
         cmd1.arg("run");
-
         cmd1.arg("--jco-dir");
         cmd1.arg("./tests/rundir/preview1_remove_directory");
         cmd1.arg("--jco-import");
diff --git a/tests/gen/preview1_remove_nonempty_directory.component.wasm b/tests/gen/preview1_remove_nonempty_directory.component.wasm
index b41af6946..76e8f6cd6 100644
Binary files a/tests/gen/preview1_remove_nonempty_directory.component.wasm and b/tests/gen/preview1_remove_nonempty_directory.component.wasm differ
diff --git a/tests/gen/preview1_remove_nonempty_directory.rs b/tests/gen/preview1_remove_nonempty_directory.rs
index 1b28fb9ac..d72d4772b 100644
--- a/tests/gen/preview1_remove_nonempty_directory.rs
+++ b/tests/gen/preview1_remove_nonempty_directory.rs
@@ -12,7 +12,6 @@ fn preview1_remove_nonempty_directory() -> anyhow::Result<()> {
         let mut cmd1 = Command::new("node");
         cmd1.arg("./src/jco.js");
         cmd1.arg("run");
-
         cmd1.arg("--jco-dir");
         cmd1.arg("./tests/rundir/preview1_remove_nonempty_directory");
         cmd1.arg("--jco-import");
diff --git a/tests/gen/preview1_renumber.component.wasm b/tests/gen/preview1_renumber.component.wasm
index 3534d7acf..111b2ba67 100644
Binary files a/tests/gen/preview1_renumber.component.wasm and b/tests/gen/preview1_renumber.component.wasm differ
diff --git a/tests/gen/preview1_renumber.rs b/tests/gen/preview1_renumber.rs
index 21d4c9378..ccbf90584 100644
--- a/tests/gen/preview1_renumber.rs
+++ b/tests/gen/preview1_renumber.rs
@@ -12,7 +12,6 @@ fn preview1_renumber() -> anyhow::Result<()> {
         let mut cmd1 = Command::new("node");
         cmd1.arg("./src/jco.js");
         cmd1.arg("run");
-
         cmd1.arg("--jco-dir");
         cmd1.arg("./tests/rundir/preview1_renumber");
         cmd1.arg("--jco-import");
diff --git a/tests/gen/preview1_sched_yield.component.wasm b/tests/gen/preview1_sched_yield.component.wasm
index c07527531..7b18b43f5 100644
Binary files a/tests/gen/preview1_sched_yield.component.wasm and b/tests/gen/preview1_sched_yield.component.wasm differ
diff --git a/tests/gen/preview1_sched_yield.rs b/tests/gen/preview1_sched_yield.rs
index 79b1819aa..967f33e6f 100644
--- a/tests/gen/preview1_sched_yield.rs
+++ b/tests/gen/preview1_sched_yield.rs
@@ -12,7 +12,6 @@ fn preview1_sched_yield() -> anyhow::Result<()> {
         let mut cmd1 = Command::new("node");
         cmd1.arg("./src/jco.js");
         cmd1.arg("run");
-
         cmd1.arg("--jco-dir");
         cmd1.arg("./tests/rundir/preview1_sched_yield");
         cmd1.arg("--jco-import");
diff --git a/tests/gen/preview1_stdio.component.wasm b/tests/gen/preview1_stdio.component.wasm
index c07768356..9820d9808 100644
Binary files a/tests/gen/preview1_stdio.component.wasm and b/tests/gen/preview1_stdio.component.wasm differ
diff --git a/tests/gen/preview1_stdio.rs b/tests/gen/preview1_stdio.rs
index 19308dff7..8e7a1c94c 100644
--- a/tests/gen/preview1_stdio.rs
+++ b/tests/gen/preview1_stdio.rs
@@ -12,7 +12,6 @@ fn preview1_stdio() -> anyhow::Result<()> {
         let mut cmd1 = Command::new("node");
         cmd1.arg("./src/jco.js");
         cmd1.arg("run");
-
         cmd1.arg("--jco-dir");
         cmd1.arg("./tests/rundir/preview1_stdio");
         cmd1.arg("--jco-import");
diff --git a/tests/gen/preview1_stdio_isatty.component.wasm b/tests/gen/preview1_stdio_isatty.component.wasm
index cffab950a..a0cabfd1a 100644
Binary files a/tests/gen/preview1_stdio_isatty.component.wasm and b/tests/gen/preview1_stdio_isatty.component.wasm differ
diff --git a/tests/gen/preview1_stdio_isatty.rs b/tests/gen/preview1_stdio_isatty.rs
index 352dbe3df..d5e88cc28 100644
--- a/tests/gen/preview1_stdio_isatty.rs
+++ b/tests/gen/preview1_stdio_isatty.rs
@@ -12,7 +12,6 @@ fn preview1_stdio_isatty() -> anyhow::Result<()> {
         let mut cmd1 = Command::new("node");
         cmd1.arg("./src/jco.js");
         cmd1.arg("run");
-
         cmd1.arg("--jco-dir");
         cmd1.arg("./tests/rundir/preview1_stdio_isatty");
         cmd1.arg("--jco-import");
diff --git a/tests/gen/preview1_stdio_not_isatty.component.wasm b/tests/gen/preview1_stdio_not_isatty.component.wasm
index 97259663e..a75e0c25e 100644
Binary files a/tests/gen/preview1_stdio_not_isatty.component.wasm and b/tests/gen/preview1_stdio_not_isatty.component.wasm differ
diff --git a/tests/gen/preview1_stdio_not_isatty.rs b/tests/gen/preview1_stdio_not_isatty.rs
index d9eb761d3..39ef2ab28 100644
--- a/tests/gen/preview1_stdio_not_isatty.rs
+++ b/tests/gen/preview1_stdio_not_isatty.rs
@@ -12,7 +12,6 @@ fn preview1_stdio_not_isatty() -> anyhow::Result<()> {
         let mut cmd1 = Command::new("node");
         cmd1.arg("./src/jco.js");
         cmd1.arg("run");
-
         cmd1.arg("--jco-dir");
         cmd1.arg("./tests/rundir/preview1_stdio_not_isatty");
         cmd1.arg("--jco-import");
diff --git a/tests/gen/preview1_symlink_create.component.wasm b/tests/gen/preview1_symlink_create.component.wasm
index c8fae378e..6cf96dc50 100644
Binary files a/tests/gen/preview1_symlink_create.component.wasm and b/tests/gen/preview1_symlink_create.component.wasm differ
diff --git a/tests/gen/preview1_symlink_create.rs b/tests/gen/preview1_symlink_create.rs
index cf3dddccc..95f4f68f8 100644
--- a/tests/gen/preview1_symlink_create.rs
+++ b/tests/gen/preview1_symlink_create.rs
@@ -12,7 +12,6 @@ fn preview1_symlink_create() -> anyhow::Result<()> {
         let mut cmd1 = Command::new("node");
         cmd1.arg("./src/jco.js");
         cmd1.arg("run");
-
         cmd1.arg("--jco-dir");
         cmd1.arg("./tests/rundir/preview1_symlink_create");
         cmd1.arg("--jco-import");
diff --git a/tests/gen/preview1_symlink_filestat.component.wasm b/tests/gen/preview1_symlink_filestat.component.wasm
index a4c3e47e0..c99b0da4c 100644
Binary files a/tests/gen/preview1_symlink_filestat.component.wasm and b/tests/gen/preview1_symlink_filestat.component.wasm differ
diff --git a/tests/gen/preview1_symlink_filestat.rs b/tests/gen/preview1_symlink_filestat.rs
index 830787db7..d6207d124 100644
--- a/tests/gen/preview1_symlink_filestat.rs
+++ b/tests/gen/preview1_symlink_filestat.rs
@@ -12,7 +12,6 @@ fn preview1_symlink_filestat() -> anyhow::Result<()> {
         let mut cmd1 = Command::new("node");
         cmd1.arg("./src/jco.js");
         cmd1.arg("run");
-
         cmd1.arg("--jco-dir");
         cmd1.arg("./tests/rundir/preview1_symlink_filestat");
         cmd1.arg("--jco-import");
diff --git a/tests/gen/preview1_symlink_loop.component.wasm b/tests/gen/preview1_symlink_loop.component.wasm
index fedeaa322..b4bd42322 100644
Binary files a/tests/gen/preview1_symlink_loop.component.wasm and b/tests/gen/preview1_symlink_loop.component.wasm differ
diff --git a/tests/gen/preview1_symlink_loop.rs b/tests/gen/preview1_symlink_loop.rs
index eb1e9ee6a..31719ec4f 100644
--- a/tests/gen/preview1_symlink_loop.rs
+++ b/tests/gen/preview1_symlink_loop.rs
@@ -12,7 +12,6 @@ fn preview1_symlink_loop() -> anyhow::Result<()> {
         let mut cmd1 = Command::new("node");
         cmd1.arg("./src/jco.js");
         cmd1.arg("run");
-
         cmd1.arg("--jco-dir");
         cmd1.arg("./tests/rundir/preview1_symlink_loop");
         cmd1.arg("--jco-import");
diff --git a/tests/gen/preview1_unicode_output.component.wasm b/tests/gen/preview1_unicode_output.component.wasm
index 3ccded862..47ac8b026 100644
Binary files a/tests/gen/preview1_unicode_output.component.wasm and b/tests/gen/preview1_unicode_output.component.wasm differ
diff --git a/tests/gen/preview1_unicode_output.rs b/tests/gen/preview1_unicode_output.rs
index e1a18ac8e..0e0a2f16b 100644
--- a/tests/gen/preview1_unicode_output.rs
+++ b/tests/gen/preview1_unicode_output.rs
@@ -12,7 +12,6 @@ fn preview1_unicode_output() -> anyhow::Result<()> {
         let mut cmd1 = Command::new("node");
         cmd1.arg("./src/jco.js");
         cmd1.arg("run");
-
         cmd1.arg("--jco-dir");
         cmd1.arg("./tests/rundir/preview1_unicode_output");
         cmd1.arg("--jco-import");
diff --git a/tests/gen/preview1_unlink_file_trailing_slashes.component.wasm b/tests/gen/preview1_unlink_file_trailing_slashes.component.wasm
index eac59c0f6..b328efa5d 100644
Binary files a/tests/gen/preview1_unlink_file_trailing_slashes.component.wasm and b/tests/gen/preview1_unlink_file_trailing_slashes.component.wasm differ
diff --git a/tests/gen/preview1_unlink_file_trailing_slashes.rs b/tests/gen/preview1_unlink_file_trailing_slashes.rs
index 2d022ecfa..54340d54a 100644
--- a/tests/gen/preview1_unlink_file_trailing_slashes.rs
+++ b/tests/gen/preview1_unlink_file_trailing_slashes.rs
@@ -12,7 +12,6 @@ fn preview1_unlink_file_trailing_slashes() -> anyhow::Result<()> {
         let mut cmd1 = Command::new("node");
         cmd1.arg("./src/jco.js");
         cmd1.arg("run");
-
         cmd1.arg("--jco-dir");
         cmd1.arg("./tests/rundir/preview1_unlink_file_trailing_slashes");
         cmd1.arg("--jco-import");
diff --git a/tests/gen/preview2_adapter_badfd.component.wasm b/tests/gen/preview2_adapter_badfd.component.wasm
index 15256cd30..e4cb4f825 100644
Binary files a/tests/gen/preview2_adapter_badfd.component.wasm and b/tests/gen/preview2_adapter_badfd.component.wasm differ
diff --git a/tests/gen/preview2_adapter_badfd.rs b/tests/gen/preview2_adapter_badfd.rs
index 3f1f6619d..bf1df2512 100644
--- a/tests/gen/preview2_adapter_badfd.rs
+++ b/tests/gen/preview2_adapter_badfd.rs
@@ -12,7 +12,6 @@ fn preview2_adapter_badfd() -> anyhow::Result<()> {
         let mut cmd1 = Command::new("node");
         cmd1.arg("./src/jco.js");
         cmd1.arg("run");
-
         cmd1.arg("--jco-dir");
         cmd1.arg("./tests/rundir/preview2_adapter_badfd");
         cmd1.arg("--jco-import");
diff --git a/tests/gen/preview2_ip_name_lookup.component.wasm b/tests/gen/preview2_ip_name_lookup.component.wasm
index be40f2967..2f8688b49 100644
Binary files a/tests/gen/preview2_ip_name_lookup.component.wasm and b/tests/gen/preview2_ip_name_lookup.component.wasm differ
diff --git a/tests/gen/preview2_ip_name_lookup.rs b/tests/gen/preview2_ip_name_lookup.rs
index f3d819d99..719452c2c 100644
--- a/tests/gen/preview2_ip_name_lookup.rs
+++ b/tests/gen/preview2_ip_name_lookup.rs
@@ -12,7 +12,6 @@ fn preview2_ip_name_lookup() -> anyhow::Result<()> {
         let mut cmd1 = Command::new("node");
         cmd1.arg("./src/jco.js");
         cmd1.arg("run");
-
         cmd1.arg("--jco-dir");
         cmd1.arg("./tests/rundir/preview2_ip_name_lookup");
         cmd1.arg("--jco-import");
diff --git a/tests/gen/preview2_random.component.wasm b/tests/gen/preview2_random.component.wasm
index 47ea9f29f..84fc41d77 100644
Binary files a/tests/gen/preview2_random.component.wasm and b/tests/gen/preview2_random.component.wasm differ
diff --git a/tests/gen/preview2_random.rs b/tests/gen/preview2_random.rs
index 18dbb82cf..bf0272045 100644
--- a/tests/gen/preview2_random.rs
+++ b/tests/gen/preview2_random.rs
@@ -12,7 +12,6 @@ fn preview2_random() -> anyhow::Result<()> {
         let mut cmd1 = Command::new("node");
         cmd1.arg("./src/jco.js");
         cmd1.arg("run");
-
         cmd1.arg("--jco-dir");
         cmd1.arg("./tests/rundir/preview2_random");
         cmd1.arg("--jco-import");
diff --git a/tests/gen/preview2_sleep.component.wasm b/tests/gen/preview2_sleep.component.wasm
index 3aa038157..ee78fcb5f 100644
Binary files a/tests/gen/preview2_sleep.component.wasm and b/tests/gen/preview2_sleep.component.wasm differ
diff --git a/tests/gen/preview2_sleep.rs b/tests/gen/preview2_sleep.rs
index 508ac279c..7ca5e663a 100644
--- a/tests/gen/preview2_sleep.rs
+++ b/tests/gen/preview2_sleep.rs
@@ -12,7 +12,6 @@ fn preview2_sleep() -> anyhow::Result<()> {
         let mut cmd1 = Command::new("node");
         cmd1.arg("./src/jco.js");
         cmd1.arg("run");
-
         cmd1.arg("--jco-dir");
         cmd1.arg("./tests/rundir/preview2_sleep");
         cmd1.arg("--jco-import");
diff --git a/tests/gen/preview2_stream_pollable_correct.component.wasm b/tests/gen/preview2_stream_pollable_correct.component.wasm
index 98d4d5f90..6f72eb8be 100644
Binary files a/tests/gen/preview2_stream_pollable_correct.component.wasm and b/tests/gen/preview2_stream_pollable_correct.component.wasm differ
diff --git a/tests/gen/preview2_stream_pollable_correct.rs b/tests/gen/preview2_stream_pollable_correct.rs
index ab6ef9af1..339e593db 100644
--- a/tests/gen/preview2_stream_pollable_correct.rs
+++ b/tests/gen/preview2_stream_pollable_correct.rs
@@ -12,7 +12,6 @@ fn preview2_stream_pollable_correct() -> anyhow::Result<()> {
         let mut cmd1 = Command::new("node");
         cmd1.arg("./src/jco.js");
         cmd1.arg("run");
-
         cmd1.arg("--jco-dir");
         cmd1.arg("./tests/rundir/preview2_stream_pollable_correct");
         cmd1.arg("--jco-import");
diff --git a/tests/gen/preview2_stream_pollable_traps.component.wasm b/tests/gen/preview2_stream_pollable_traps.component.wasm
index 8c2ef0bc9..fb04a8865 100644
Binary files a/tests/gen/preview2_stream_pollable_traps.component.wasm and b/tests/gen/preview2_stream_pollable_traps.component.wasm differ
diff --git a/tests/gen/preview2_stream_pollable_traps.rs b/tests/gen/preview2_stream_pollable_traps.rs
index d39270cfd..4bbc0efdc 100644
--- a/tests/gen/preview2_stream_pollable_traps.rs
+++ b/tests/gen/preview2_stream_pollable_traps.rs
@@ -12,7 +12,6 @@ fn preview2_stream_pollable_traps() -> anyhow::Result<()> {
         let mut cmd1 = Command::new("node");
         cmd1.arg("./src/jco.js");
         cmd1.arg("run");
-
         cmd1.arg("--jco-dir");
         cmd1.arg("./tests/rundir/preview2_stream_pollable_traps");
         cmd1.arg("--jco-import");
diff --git a/tests/gen/preview2_tcp_bind.component.wasm b/tests/gen/preview2_tcp_bind.component.wasm
index 869ae2a02..dc8355067 100644
Binary files a/tests/gen/preview2_tcp_bind.component.wasm and b/tests/gen/preview2_tcp_bind.component.wasm differ
diff --git a/tests/gen/preview2_tcp_bind.rs b/tests/gen/preview2_tcp_bind.rs
index a1c5a3586..3a7d8ef4d 100644
--- a/tests/gen/preview2_tcp_bind.rs
+++ b/tests/gen/preview2_tcp_bind.rs
@@ -12,7 +12,6 @@ fn preview2_tcp_bind() -> anyhow::Result<()> {
         let mut cmd1 = Command::new("node");
         cmd1.arg("./src/jco.js");
         cmd1.arg("run");
-
         cmd1.arg("--jco-dir");
         cmd1.arg("./tests/rundir/preview2_tcp_bind");
         cmd1.arg("--jco-import");
diff --git a/tests/gen/preview2_tcp_connect.component.wasm b/tests/gen/preview2_tcp_connect.component.wasm
index b94887ff7..6ddb2f9a3 100644
Binary files a/tests/gen/preview2_tcp_connect.component.wasm and b/tests/gen/preview2_tcp_connect.component.wasm differ
diff --git a/tests/gen/preview2_tcp_connect.rs b/tests/gen/preview2_tcp_connect.rs
index d2bf5fbc4..31476ded4 100644
--- a/tests/gen/preview2_tcp_connect.rs
+++ b/tests/gen/preview2_tcp_connect.rs
@@ -12,7 +12,6 @@ fn preview2_tcp_connect() -> anyhow::Result<()> {
         let mut cmd1 = Command::new("node");
         cmd1.arg("./src/jco.js");
         cmd1.arg("run");
-
         cmd1.arg("--jco-dir");
         cmd1.arg("./tests/rundir/preview2_tcp_connect");
         cmd1.arg("--jco-import");
diff --git a/tests/gen/preview2_tcp_sample_application.component.wasm b/tests/gen/preview2_tcp_sample_application.component.wasm
index ba75d6e67..a5dd3e1ab 100644
Binary files a/tests/gen/preview2_tcp_sample_application.component.wasm and b/tests/gen/preview2_tcp_sample_application.component.wasm differ
diff --git a/tests/gen/preview2_tcp_sample_application.rs b/tests/gen/preview2_tcp_sample_application.rs
index bc84b96ff..08355da93 100644
--- a/tests/gen/preview2_tcp_sample_application.rs
+++ b/tests/gen/preview2_tcp_sample_application.rs
@@ -12,7 +12,6 @@ fn preview2_tcp_sample_application() -> anyhow::Result<()> {
         let mut cmd1 = Command::new("node");
         cmd1.arg("./src/jco.js");
         cmd1.arg("run");
-
         cmd1.arg("--jco-dir");
         cmd1.arg("./tests/rundir/preview2_tcp_sample_application");
         cmd1.arg("--jco-import");
diff --git a/tests/gen/preview2_tcp_sockopts.component.wasm b/tests/gen/preview2_tcp_sockopts.component.wasm
index 71ac5f65d..2ab7805e0 100644
Binary files a/tests/gen/preview2_tcp_sockopts.component.wasm and b/tests/gen/preview2_tcp_sockopts.component.wasm differ
diff --git a/tests/gen/preview2_tcp_sockopts.rs b/tests/gen/preview2_tcp_sockopts.rs
index 5a34c8fa7..097f363b2 100644
--- a/tests/gen/preview2_tcp_sockopts.rs
+++ b/tests/gen/preview2_tcp_sockopts.rs
@@ -12,7 +12,6 @@ fn preview2_tcp_sockopts() -> anyhow::Result<()> {
         let mut cmd1 = Command::new("node");
         cmd1.arg("./src/jco.js");
         cmd1.arg("run");
-
         cmd1.arg("--jco-dir");
         cmd1.arg("./tests/rundir/preview2_tcp_sockopts");
         cmd1.arg("--jco-import");
diff --git a/tests/gen/preview2_tcp_states.component.wasm b/tests/gen/preview2_tcp_states.component.wasm
index 9595a7504..f1543f5be 100644
Binary files a/tests/gen/preview2_tcp_states.component.wasm and b/tests/gen/preview2_tcp_states.component.wasm differ
diff --git a/tests/gen/preview2_tcp_states.rs b/tests/gen/preview2_tcp_states.rs
index 10af5f14a..2ea615c9d 100644
--- a/tests/gen/preview2_tcp_states.rs
+++ b/tests/gen/preview2_tcp_states.rs
@@ -12,7 +12,6 @@ fn preview2_tcp_states() -> anyhow::Result<()> {
         let mut cmd1 = Command::new("node");
         cmd1.arg("./src/jco.js");
         cmd1.arg("run");
-
         cmd1.arg("--jco-dir");
         cmd1.arg("./tests/rundir/preview2_tcp_states");
         cmd1.arg("--jco-import");
diff --git a/tests/gen/preview2_udp_bind.component.wasm b/tests/gen/preview2_udp_bind.component.wasm
index 6d4f87b28..c9868de15 100644
Binary files a/tests/gen/preview2_udp_bind.component.wasm and b/tests/gen/preview2_udp_bind.component.wasm differ
diff --git a/tests/gen/preview2_udp_bind.rs b/tests/gen/preview2_udp_bind.rs
index 08b9736f3..cbecb30cd 100644
--- a/tests/gen/preview2_udp_bind.rs
+++ b/tests/gen/preview2_udp_bind.rs
@@ -12,7 +12,6 @@ fn preview2_udp_bind() -> anyhow::Result<()> {
         let mut cmd1 = Command::new("node");
         cmd1.arg("./src/jco.js");
         cmd1.arg("run");
-
         cmd1.arg("--jco-dir");
         cmd1.arg("./tests/rundir/preview2_udp_bind");
         cmd1.arg("--jco-import");
diff --git a/tests/gen/preview2_udp_connect.component.wasm b/tests/gen/preview2_udp_connect.component.wasm
index 3190d9f37..3850dcb5f 100644
Binary files a/tests/gen/preview2_udp_connect.component.wasm and b/tests/gen/preview2_udp_connect.component.wasm differ
diff --git a/tests/gen/preview2_udp_connect.rs b/tests/gen/preview2_udp_connect.rs
index c77428c56..f24142871 100644
--- a/tests/gen/preview2_udp_connect.rs
+++ b/tests/gen/preview2_udp_connect.rs
@@ -12,7 +12,6 @@ fn preview2_udp_connect() -> anyhow::Result<()> {
         let mut cmd1 = Command::new("node");
         cmd1.arg("./src/jco.js");
         cmd1.arg("run");
-
         cmd1.arg("--jco-dir");
         cmd1.arg("./tests/rundir/preview2_udp_connect");
         cmd1.arg("--jco-import");
diff --git a/tests/gen/preview2_udp_sample_application.component.wasm b/tests/gen/preview2_udp_sample_application.component.wasm
index 5c26994ec..050d6137e 100644
Binary files a/tests/gen/preview2_udp_sample_application.component.wasm and b/tests/gen/preview2_udp_sample_application.component.wasm differ
diff --git a/tests/gen/preview2_udp_sample_application.rs b/tests/gen/preview2_udp_sample_application.rs
index 25f2a05b8..f2defb9c3 100644
--- a/tests/gen/preview2_udp_sample_application.rs
+++ b/tests/gen/preview2_udp_sample_application.rs
@@ -12,7 +12,6 @@ fn preview2_udp_sample_application() -> anyhow::Result<()> {
         let mut cmd1 = Command::new("node");
         cmd1.arg("./src/jco.js");
         cmd1.arg("run");
-
         cmd1.arg("--jco-dir");
         cmd1.arg("./tests/rundir/preview2_udp_sample_application");
         cmd1.arg("--jco-import");
diff --git a/tests/gen/preview2_udp_sockopts.component.wasm b/tests/gen/preview2_udp_sockopts.component.wasm
index 17f21b471..d5772b08d 100644
Binary files a/tests/gen/preview2_udp_sockopts.component.wasm and b/tests/gen/preview2_udp_sockopts.component.wasm differ
diff --git a/tests/gen/preview2_udp_sockopts.rs b/tests/gen/preview2_udp_sockopts.rs
index 1a0030779..ecd0d2ec9 100644
--- a/tests/gen/preview2_udp_sockopts.rs
+++ b/tests/gen/preview2_udp_sockopts.rs
@@ -12,7 +12,6 @@ fn preview2_udp_sockopts() -> anyhow::Result<()> {
         let mut cmd1 = Command::new("node");
         cmd1.arg("./src/jco.js");
         cmd1.arg("run");
-
         cmd1.arg("--jco-dir");
         cmd1.arg("./tests/rundir/preview2_udp_sockopts");
         cmd1.arg("--jco-import");
diff --git a/tests/gen/preview2_udp_states.component.wasm b/tests/gen/preview2_udp_states.component.wasm
index e07983623..c870055d9 100644
Binary files a/tests/gen/preview2_udp_states.component.wasm and b/tests/gen/preview2_udp_states.component.wasm differ
diff --git a/tests/gen/preview2_udp_states.rs b/tests/gen/preview2_udp_states.rs
index b6fea5a3a..e40b5f2d8 100644
--- a/tests/gen/preview2_udp_states.rs
+++ b/tests/gen/preview2_udp_states.rs
@@ -12,7 +12,6 @@ fn preview2_udp_states() -> anyhow::Result<()> {
         let mut cmd1 = Command::new("node");
         cmd1.arg("./src/jco.js");
         cmd1.arg("run");
-
         cmd1.arg("--jco-dir");
         cmd1.arg("./tests/rundir/preview2_udp_states");
         cmd1.arg("--jco-import");
diff --git a/tests/gen/proxy_echo.component.wasm b/tests/gen/proxy_echo.component.wasm
index fdaf7d494..08687c75c 100644
Binary files a/tests/gen/proxy_echo.component.wasm and b/tests/gen/proxy_echo.component.wasm differ
diff --git a/tests/gen/proxy_echo.rs b/tests/gen/proxy_echo.rs
index 429f28142..3f021e71b 100644
--- a/tests/gen/proxy_echo.rs
+++ b/tests/gen/proxy_echo.rs
@@ -12,7 +12,6 @@ fn proxy_echo() -> anyhow::Result<()> {
         let mut cmd1 = Command::new("node");
         cmd1.arg("./src/jco.js");
         cmd1.arg("run");
-
         cmd1.arg("--jco-dir");
         cmd1.arg("./tests/rundir/proxy_echo");
         cmd1.arg("--jco-import");
diff --git a/tests/gen/proxy_handler.component.wasm b/tests/gen/proxy_handler.component.wasm
index 815efd242..c215f84c6 100644
Binary files a/tests/gen/proxy_handler.component.wasm and b/tests/gen/proxy_handler.component.wasm differ
diff --git a/tests/gen/proxy_handler.rs b/tests/gen/proxy_handler.rs
index 7ae1334eb..460bceb45 100644
--- a/tests/gen/proxy_handler.rs
+++ b/tests/gen/proxy_handler.rs
@@ -12,7 +12,6 @@ fn proxy_handler() -> anyhow::Result<()> {
         let mut cmd1 = Command::new("node");
         cmd1.arg("./src/jco.js");
         cmd1.arg("run");
-
         cmd1.arg("--jco-dir");
         cmd1.arg("./tests/rundir/proxy_handler");
         cmd1.arg("--jco-import");
diff --git a/tests/gen/proxy_hash.component.wasm b/tests/gen/proxy_hash.component.wasm
index 99b31dfdf..67e3064c0 100644
Binary files a/tests/gen/proxy_hash.component.wasm and b/tests/gen/proxy_hash.component.wasm differ
diff --git a/tests/gen/proxy_hash.rs b/tests/gen/proxy_hash.rs
index 8e7f231ed..59a6227bd 100644
--- a/tests/gen/proxy_hash.rs
+++ b/tests/gen/proxy_hash.rs
@@ -12,7 +12,6 @@ fn proxy_hash() -> anyhow::Result<()> {
         let mut cmd1 = Command::new("node");
         cmd1.arg("./src/jco.js");
         cmd1.arg("run");
-
         cmd1.arg("--jco-dir");
         cmd1.arg("./tests/rundir/proxy_hash");
         cmd1.arg("--jco-import");
diff --git a/tests/generated/api_proxy.rs b/tests/generated/api_proxy.rs
new file mode 100644
index 000000000..1adf303e2
--- /dev/null
+++ b/tests/generated/api_proxy.rs
@@ -0,0 +1,23 @@
+//! This file has been auto-generated, please do not modify manually
+//! To regenerate this file re-run `cargo xtask generate tests` from the project root
+
+use std::fs;
+use tempdir::TempDir;
+use xshell::{cmd, Shell};
+
+#[test]
+fn api_proxy() -> anyhow::Result<()> {
+    let sh = Shell::new()?;
+    let file_name = "api_proxy";
+    let tempdir = TempDir::new("{file_name}")?;
+    let wasi_file = test_utils::compile(&sh, &tempdir, &file_name)?;
+    let _ = fs::remove_dir_all("./tests/rundir/api_proxy");
+
+    let cmd = cmd!(sh, "node ./src/jco.js run  --jco-dir ./tests/rundir/api_proxy --jco-import ./tests/virtualenvs/base.js {wasi_file} hello this '' 'is an argument' 'with 🚩 emoji'");
+
+    let cmd = cmd
+        .env("JCO_RUN_PATH", "deno")
+        .env("JCO_RUN_ARGS", "run --importmap importmap.json -A");
+    cmd.run()?;
+    Ok(())
+}
diff --git a/tests/generated/api_proxy_streaming.rs b/tests/generated/api_proxy_streaming.rs
new file mode 100644
index 000000000..6e8339902
--- /dev/null
+++ b/tests/generated/api_proxy_streaming.rs
@@ -0,0 +1,23 @@
+//! This file has been auto-generated, please do not modify manually
+//! To regenerate this file re-run `cargo xtask generate tests` from the project root
+
+use std::fs;
+use tempdir::TempDir;
+use xshell::{cmd, Shell};
+
+#[test]
+fn api_proxy_streaming() -> anyhow::Result<()> {
+    let sh = Shell::new()?;
+    let file_name = "api_proxy_streaming";
+    let tempdir = TempDir::new("{file_name}")?;
+    let wasi_file = test_utils::compile(&sh, &tempdir, &file_name)?;
+    let _ = fs::remove_dir_all("./tests/rundir/api_proxy_streaming");
+
+    let cmd = cmd!(sh, "node ./src/jco.js run  --jco-dir ./tests/rundir/api_proxy_streaming --jco-import ./tests/virtualenvs/base.js {wasi_file} hello this '' 'is an argument' 'with 🚩 emoji'");
+
+    let cmd = cmd
+        .env("JCO_RUN_PATH", "deno")
+        .env("JCO_RUN_ARGS", "run --importmap importmap.json -A");
+    cmd.run()?;
+    Ok(())
+}
diff --git a/tests/generated/api_reactor.rs b/tests/generated/api_reactor.rs
new file mode 100644
index 000000000..2d62d81ba
--- /dev/null
+++ b/tests/generated/api_reactor.rs
@@ -0,0 +1,23 @@
+//! This file has been auto-generated, please do not modify manually
+//! To regenerate this file re-run `cargo xtask generate tests` from the project root
+
+use std::fs;
+use tempdir::TempDir;
+use xshell::{cmd, Shell};
+
+#[test]
+fn api_reactor() -> anyhow::Result<()> {
+    let sh = Shell::new()?;
+    let file_name = "api_reactor";
+    let tempdir = TempDir::new("{file_name}")?;
+    let wasi_file = test_utils::compile(&sh, &tempdir, &file_name)?;
+    let _ = fs::remove_dir_all("./tests/rundir/api_reactor");
+
+    let cmd = cmd!(sh, "node ./src/jco.js run  --jco-dir ./tests/rundir/api_reactor --jco-import ./tests/virtualenvs/base.js {wasi_file} hello this '' 'is an argument' 'with 🚩 emoji'");
+
+    let cmd = cmd
+        .env("JCO_RUN_PATH", "deno")
+        .env("JCO_RUN_ARGS", "run --importmap importmap.json -A");
+    cmd.run()?;
+    Ok(())
+}
diff --git a/tests/generated/api_read_only.rs b/tests/generated/api_read_only.rs
new file mode 100644
index 000000000..3282fe2b0
--- /dev/null
+++ b/tests/generated/api_read_only.rs
@@ -0,0 +1,20 @@
+//! This file has been auto-generated, please do not modify manually
+//! To regenerate this file re-run `cargo xtask generate tests` from the project root
+
+use std::fs;
+// use tempdir::TempDir;
+// use xshell::{cmd, Shell};
+
+#[test]
+fn api_read_only() -> anyhow::Result<()> {
+    // let sh = Shell::new()?;
+    // let file_name = "api_read_only";
+    // let tempdir = TempDir::new("{file_name}")?;
+    // let wasi_file = test_utils::compile(&sh, &tempdir, &file_name)?;
+    let _ = fs::remove_dir_all("./tests/rundir/api_read_only");
+
+    // let cmd = cmd!(sh, "node ./src/jco.js run  --jco-dir ./tests/rundir/api_read_only --jco-import ./tests/virtualenvs/base.js {wasi_file} hello this '' 'is an argument' 'with 🚩 emoji'");
+
+    // let cmd = cmd.env("JCO_RUN_PATH", "deno").env("JCO_RUN_ARGS", "run --importmap importmap.json -A");cmd.run()?;
+    panic!("skipped"); // Ok(())
+}
diff --git a/tests/generated/api_time.rs b/tests/generated/api_time.rs
new file mode 100644
index 000000000..35f50519a
--- /dev/null
+++ b/tests/generated/api_time.rs
@@ -0,0 +1,23 @@
+//! This file has been auto-generated, please do not modify manually
+//! To regenerate this file re-run `cargo xtask generate tests` from the project root
+
+use std::fs;
+use tempdir::TempDir;
+use xshell::{cmd, Shell};
+
+#[test]
+fn api_time() -> anyhow::Result<()> {
+    let sh = Shell::new()?;
+    let file_name = "api_time";
+    let tempdir = TempDir::new("{file_name}")?;
+    let wasi_file = test_utils::compile(&sh, &tempdir, &file_name)?;
+    let _ = fs::remove_dir_all("./tests/rundir/api_time");
+
+    let cmd = cmd!(sh, "node ./src/jco.js run  --jco-dir ./tests/rundir/api_time --jco-import ./tests/virtualenvs/fakeclocks.js {wasi_file} hello this '' 'is an argument' 'with 🚩 emoji'");
+
+    let cmd = cmd
+        .env("JCO_RUN_PATH", "deno")
+        .env("JCO_RUN_ARGS", "run --importmap importmap.json -A");
+    cmd.run()?;
+    Ok(())
+}
diff --git a/tests/generated/cli_args.rs b/tests/generated/cli_args.rs
new file mode 100644
index 000000000..f0a7cabc4
--- /dev/null
+++ b/tests/generated/cli_args.rs
@@ -0,0 +1,23 @@
+//! This file has been auto-generated, please do not modify manually
+//! To regenerate this file re-run `cargo xtask generate tests` from the project root
+
+use std::fs;
+use tempdir::TempDir;
+use xshell::{cmd, Shell};
+
+#[test]
+fn cli_args() -> anyhow::Result<()> {
+    let sh = Shell::new()?;
+    let file_name = "cli_args";
+    let tempdir = TempDir::new("{file_name}")?;
+    let wasi_file = test_utils::compile(&sh, &tempdir, &file_name)?;
+    let _ = fs::remove_dir_all("./tests/rundir/cli_args");
+
+    let cmd = cmd!(sh, "node ./src/jco.js run  --jco-dir ./tests/rundir/cli_args --jco-import ./tests/virtualenvs/base.js {wasi_file} hello this '' 'is an argument' 'with 🚩 emoji'");
+
+    let cmd = cmd
+        .env("JCO_RUN_PATH", "deno")
+        .env("JCO_RUN_ARGS", "run --importmap importmap.json -A");
+    cmd.run()?;
+    Ok(())
+}
diff --git a/tests/generated/cli_default_clocks.rs b/tests/generated/cli_default_clocks.rs
new file mode 100644
index 000000000..1d53d2abc
--- /dev/null
+++ b/tests/generated/cli_default_clocks.rs
@@ -0,0 +1,23 @@
+//! This file has been auto-generated, please do not modify manually
+//! To regenerate this file re-run `cargo xtask generate tests` from the project root
+
+use std::fs;
+use tempdir::TempDir;
+use xshell::{cmd, Shell};
+
+#[test]
+fn cli_default_clocks() -> anyhow::Result<()> {
+    let sh = Shell::new()?;
+    let file_name = "cli_default_clocks";
+    let tempdir = TempDir::new("{file_name}")?;
+    let wasi_file = test_utils::compile(&sh, &tempdir, &file_name)?;
+    let _ = fs::remove_dir_all("./tests/rundir/cli_default_clocks");
+
+    let cmd = cmd!(sh, "node ./src/jco.js run  --jco-dir ./tests/rundir/cli_default_clocks --jco-import ./tests/virtualenvs/base.js {wasi_file} hello this '' 'is an argument' 'with 🚩 emoji'");
+
+    let cmd = cmd
+        .env("JCO_RUN_PATH", "deno")
+        .env("JCO_RUN_ARGS", "run --importmap importmap.json -A");
+    cmd.run()?;
+    Ok(())
+}
diff --git a/tests/generated/cli_directory_list.rs b/tests/generated/cli_directory_list.rs
new file mode 100644
index 000000000..4e1386b43
--- /dev/null
+++ b/tests/generated/cli_directory_list.rs
@@ -0,0 +1,23 @@
+//! This file has been auto-generated, please do not modify manually
+//! To regenerate this file re-run `cargo xtask generate tests` from the project root
+
+use std::fs;
+use tempdir::TempDir;
+use xshell::{cmd, Shell};
+
+#[test]
+fn cli_directory_list() -> anyhow::Result<()> {
+    let sh = Shell::new()?;
+    let file_name = "cli_directory_list";
+    let tempdir = TempDir::new("{file_name}")?;
+    let wasi_file = test_utils::compile(&sh, &tempdir, &file_name)?;
+    let _ = fs::remove_dir_all("./tests/rundir/cli_directory_list");
+
+    let cmd = cmd!(sh, "node ./src/jco.js run  --jco-dir ./tests/rundir/cli_directory_list --jco-import ./tests/virtualenvs/base.js {wasi_file} hello this '' 'is an argument' 'with 🚩 emoji'");
+
+    let cmd = cmd
+        .env("JCO_RUN_PATH", "deno")
+        .env("JCO_RUN_ARGS", "run --importmap importmap.json -A");
+    cmd.run()?;
+    Ok(())
+}
diff --git a/tests/generated/cli_env.rs b/tests/generated/cli_env.rs
new file mode 100644
index 000000000..51a41254c
--- /dev/null
+++ b/tests/generated/cli_env.rs
@@ -0,0 +1,23 @@
+//! This file has been auto-generated, please do not modify manually
+//! To regenerate this file re-run `cargo xtask generate tests` from the project root
+
+use std::fs;
+use tempdir::TempDir;
+use xshell::{cmd, Shell};
+
+#[test]
+fn cli_env() -> anyhow::Result<()> {
+    let sh = Shell::new()?;
+    let file_name = "cli_env";
+    let tempdir = TempDir::new("{file_name}")?;
+    let wasi_file = test_utils::compile(&sh, &tempdir, &file_name)?;
+    let _ = fs::remove_dir_all("./tests/rundir/cli_env");
+
+    let cmd = cmd!(sh, "node ./src/jco.js run  --jco-dir ./tests/rundir/cli_env --jco-import ./tests/virtualenvs/base.js {wasi_file} hello this '' 'is an argument' 'with 🚩 emoji'");
+
+    let cmd = cmd
+        .env("JCO_RUN_PATH", "deno")
+        .env("JCO_RUN_ARGS", "run --importmap importmap.json -A");
+    cmd.run()?;
+    Ok(())
+}
diff --git a/tests/generated/cli_exit_default.rs b/tests/generated/cli_exit_default.rs
new file mode 100644
index 000000000..02d12ac81
--- /dev/null
+++ b/tests/generated/cli_exit_default.rs
@@ -0,0 +1,23 @@
+//! This file has been auto-generated, please do not modify manually
+//! To regenerate this file re-run `cargo xtask generate tests` from the project root
+
+use std::fs;
+use tempdir::TempDir;
+use xshell::{cmd, Shell};
+
+#[test]
+fn cli_exit_default() -> anyhow::Result<()> {
+    let sh = Shell::new()?;
+    let file_name = "cli_exit_default";
+    let tempdir = TempDir::new("{file_name}")?;
+    let wasi_file = test_utils::compile(&sh, &tempdir, &file_name)?;
+    let _ = fs::remove_dir_all("./tests/rundir/cli_exit_default");
+
+    let cmd = cmd!(sh, "node ./src/jco.js run  --jco-dir ./tests/rundir/cli_exit_default --jco-import ./tests/virtualenvs/base.js {wasi_file} hello this '' 'is an argument' 'with 🚩 emoji'");
+
+    let cmd = cmd
+        .env("JCO_RUN_PATH", "deno")
+        .env("JCO_RUN_ARGS", "run --importmap importmap.json -A");
+    cmd.run()?;
+    Ok(())
+}
diff --git a/tests/generated/cli_exit_failure.rs b/tests/generated/cli_exit_failure.rs
new file mode 100644
index 000000000..f49a0d690
--- /dev/null
+++ b/tests/generated/cli_exit_failure.rs
@@ -0,0 +1,23 @@
+//! This file has been auto-generated, please do not modify manually
+//! To regenerate this file re-run `cargo xtask generate tests` from the project root
+
+use std::fs;
+use tempdir::TempDir;
+use xshell::{cmd, Shell};
+
+#[test]
+fn cli_exit_failure() -> anyhow::Result<()> {
+    let sh = Shell::new()?;
+    let file_name = "cli_exit_failure";
+    let tempdir = TempDir::new("{file_name}")?;
+    let wasi_file = test_utils::compile(&sh, &tempdir, &file_name)?;
+    let _ = fs::remove_dir_all("./tests/rundir/cli_exit_failure");
+
+    let cmd = cmd!(sh, "node ./src/jco.js run  --jco-dir ./tests/rundir/cli_exit_failure --jco-import ./tests/virtualenvs/base.js {wasi_file} hello this '' 'is an argument' 'with 🚩 emoji'");
+
+    let cmd = cmd
+        .env("JCO_RUN_PATH", "deno")
+        .env("JCO_RUN_ARGS", "run --importmap importmap.json -A");
+    cmd.run().expect_err("test should exit with code 1");
+    Ok(())
+}
diff --git a/tests/generated/cli_exit_panic.rs b/tests/generated/cli_exit_panic.rs
new file mode 100644
index 000000000..2495c6497
--- /dev/null
+++ b/tests/generated/cli_exit_panic.rs
@@ -0,0 +1,23 @@
+//! This file has been auto-generated, please do not modify manually
+//! To regenerate this file re-run `cargo xtask generate tests` from the project root
+
+use std::fs;
+use tempdir::TempDir;
+use xshell::{cmd, Shell};
+
+#[test]
+fn cli_exit_panic() -> anyhow::Result<()> {
+    let sh = Shell::new()?;
+    let file_name = "cli_exit_panic";
+    let tempdir = TempDir::new("{file_name}")?;
+    let wasi_file = test_utils::compile(&sh, &tempdir, &file_name)?;
+    let _ = fs::remove_dir_all("./tests/rundir/cli_exit_panic");
+
+    let cmd = cmd!(sh, "node ./src/jco.js run  --jco-dir ./tests/rundir/cli_exit_panic --jco-import ./tests/virtualenvs/base.js {wasi_file} hello this '' 'is an argument' 'with 🚩 emoji'");
+
+    let cmd = cmd
+        .env("JCO_RUN_PATH", "deno")
+        .env("JCO_RUN_ARGS", "run --importmap importmap.json -A");
+    cmd.run().expect_err("test should exit with code 1");
+    Ok(())
+}
diff --git a/tests/generated/cli_exit_success.rs b/tests/generated/cli_exit_success.rs
new file mode 100644
index 000000000..fef9e9280
--- /dev/null
+++ b/tests/generated/cli_exit_success.rs
@@ -0,0 +1,23 @@
+//! This file has been auto-generated, please do not modify manually
+//! To regenerate this file re-run `cargo xtask generate tests` from the project root
+
+use std::fs;
+use tempdir::TempDir;
+use xshell::{cmd, Shell};
+
+#[test]
+fn cli_exit_success() -> anyhow::Result<()> {
+    let sh = Shell::new()?;
+    let file_name = "cli_exit_success";
+    let tempdir = TempDir::new("{file_name}")?;
+    let wasi_file = test_utils::compile(&sh, &tempdir, &file_name)?;
+    let _ = fs::remove_dir_all("./tests/rundir/cli_exit_success");
+
+    let cmd = cmd!(sh, "node ./src/jco.js run  --jco-dir ./tests/rundir/cli_exit_success --jco-import ./tests/virtualenvs/base.js {wasi_file} hello this '' 'is an argument' 'with 🚩 emoji'");
+
+    let cmd = cmd
+        .env("JCO_RUN_PATH", "deno")
+        .env("JCO_RUN_ARGS", "run --importmap importmap.json -A");
+    cmd.run()?;
+    Ok(())
+}
diff --git a/tests/generated/cli_export_cabi_realloc.rs b/tests/generated/cli_export_cabi_realloc.rs
new file mode 100644
index 000000000..a33f9106e
--- /dev/null
+++ b/tests/generated/cli_export_cabi_realloc.rs
@@ -0,0 +1,23 @@
+//! This file has been auto-generated, please do not modify manually
+//! To regenerate this file re-run `cargo xtask generate tests` from the project root
+
+use std::fs;
+use tempdir::TempDir;
+use xshell::{cmd, Shell};
+
+#[test]
+fn cli_export_cabi_realloc() -> anyhow::Result<()> {
+    let sh = Shell::new()?;
+    let file_name = "cli_export_cabi_realloc";
+    let tempdir = TempDir::new("{file_name}")?;
+    let wasi_file = test_utils::compile(&sh, &tempdir, &file_name)?;
+    let _ = fs::remove_dir_all("./tests/rundir/cli_export_cabi_realloc");
+
+    let cmd = cmd!(sh, "node ./src/jco.js run  --jco-dir ./tests/rundir/cli_export_cabi_realloc --jco-import ./tests/virtualenvs/base.js {wasi_file} hello this '' 'is an argument' 'with 🚩 emoji'");
+
+    let cmd = cmd
+        .env("JCO_RUN_PATH", "deno")
+        .env("JCO_RUN_ARGS", "run --importmap importmap.json -A");
+    cmd.run()?;
+    Ok(())
+}
diff --git a/tests/generated/cli_file_append.rs b/tests/generated/cli_file_append.rs
new file mode 100644
index 000000000..f3b4a98c7
--- /dev/null
+++ b/tests/generated/cli_file_append.rs
@@ -0,0 +1,23 @@
+//! This file has been auto-generated, please do not modify manually
+//! To regenerate this file re-run `cargo xtask generate tests` from the project root
+
+use std::fs;
+use tempdir::TempDir;
+use xshell::{cmd, Shell};
+
+#[test]
+fn cli_file_append() -> anyhow::Result<()> {
+    let sh = Shell::new()?;
+    let file_name = "cli_file_append";
+    let tempdir = TempDir::new("{file_name}")?;
+    let wasi_file = test_utils::compile(&sh, &tempdir, &file_name)?;
+    let _ = fs::remove_dir_all("./tests/rundir/cli_file_append");
+
+    let cmd = cmd!(sh, "node ./src/jco.js run  --jco-dir ./tests/rundir/cli_file_append --jco-import ./tests/virtualenvs/bar-jabberwock.js {wasi_file} hello this '' 'is an argument' 'with 🚩 emoji'");
+
+    let cmd = cmd
+        .env("JCO_RUN_PATH", "deno")
+        .env("JCO_RUN_ARGS", "run --importmap importmap.json -A");
+    cmd.run()?;
+    Ok(())
+}
diff --git a/tests/generated/cli_file_dir_sync.rs b/tests/generated/cli_file_dir_sync.rs
new file mode 100644
index 000000000..7903d54d0
--- /dev/null
+++ b/tests/generated/cli_file_dir_sync.rs
@@ -0,0 +1,23 @@
+//! This file has been auto-generated, please do not modify manually
+//! To regenerate this file re-run `cargo xtask generate tests` from the project root
+
+use std::fs;
+use tempdir::TempDir;
+use xshell::{cmd, Shell};
+
+#[test]
+fn cli_file_dir_sync() -> anyhow::Result<()> {
+    let sh = Shell::new()?;
+    let file_name = "cli_file_dir_sync";
+    let tempdir = TempDir::new("{file_name}")?;
+    let wasi_file = test_utils::compile(&sh, &tempdir, &file_name)?;
+    let _ = fs::remove_dir_all("./tests/rundir/cli_file_dir_sync");
+
+    let cmd = cmd!(sh, "node ./src/jco.js run  --jco-dir ./tests/rundir/cli_file_dir_sync --jco-import ./tests/virtualenvs/base.js {wasi_file} hello this '' 'is an argument' 'with 🚩 emoji'");
+
+    let cmd = cmd
+        .env("JCO_RUN_PATH", "deno")
+        .env("JCO_RUN_ARGS", "run --importmap importmap.json -A");
+    cmd.run()?;
+    Ok(())
+}
diff --git a/tests/generated/cli_file_read.rs b/tests/generated/cli_file_read.rs
new file mode 100644
index 000000000..231548b1e
--- /dev/null
+++ b/tests/generated/cli_file_read.rs
@@ -0,0 +1,23 @@
+//! This file has been auto-generated, please do not modify manually
+//! To regenerate this file re-run `cargo xtask generate tests` from the project root
+
+use std::fs;
+use tempdir::TempDir;
+use xshell::{cmd, Shell};
+
+#[test]
+fn cli_file_read() -> anyhow::Result<()> {
+    let sh = Shell::new()?;
+    let file_name = "cli_file_read";
+    let tempdir = TempDir::new("{file_name}")?;
+    let wasi_file = test_utils::compile(&sh, &tempdir, &file_name)?;
+    let _ = fs::remove_dir_all("./tests/rundir/cli_file_read");
+
+    let cmd = cmd!(sh, "node ./src/jco.js run  --jco-dir ./tests/rundir/cli_file_read --jco-import ./tests/virtualenvs/base.js {wasi_file} hello this '' 'is an argument' 'with 🚩 emoji'");
+
+    let cmd = cmd
+        .env("JCO_RUN_PATH", "deno")
+        .env("JCO_RUN_ARGS", "run --importmap importmap.json -A");
+    cmd.run()?;
+    Ok(())
+}
diff --git a/tests/generated/cli_hello_stdout.rs b/tests/generated/cli_hello_stdout.rs
new file mode 100644
index 000000000..ecff4a299
--- /dev/null
+++ b/tests/generated/cli_hello_stdout.rs
@@ -0,0 +1,23 @@
+//! This file has been auto-generated, please do not modify manually
+//! To regenerate this file re-run `cargo xtask generate tests` from the project root
+
+use std::fs;
+use tempdir::TempDir;
+use xshell::{cmd, Shell};
+
+#[test]
+fn cli_hello_stdout() -> anyhow::Result<()> {
+    let sh = Shell::new()?;
+    let file_name = "cli_hello_stdout";
+    let tempdir = TempDir::new("{file_name}")?;
+    let wasi_file = test_utils::compile(&sh, &tempdir, &file_name)?;
+    let _ = fs::remove_dir_all("./tests/rundir/cli_hello_stdout");
+
+    let cmd = cmd!(sh, "node ./src/jco.js run  --jco-dir ./tests/rundir/cli_hello_stdout --jco-import ./tests/virtualenvs/base.js {wasi_file} hello this '' 'is an argument' 'with 🚩 emoji'");
+
+    let cmd = cmd
+        .env("JCO_RUN_PATH", "deno")
+        .env("JCO_RUN_ARGS", "run --importmap importmap.json -A");
+    cmd.run()?;
+    Ok(())
+}
diff --git a/tests/generated/cli_splice_stdin.rs b/tests/generated/cli_splice_stdin.rs
new file mode 100644
index 000000000..8b66dd277
--- /dev/null
+++ b/tests/generated/cli_splice_stdin.rs
@@ -0,0 +1,23 @@
+//! This file has been auto-generated, please do not modify manually
+//! To regenerate this file re-run `cargo xtask generate tests` from the project root
+
+use std::fs;
+use tempdir::TempDir;
+use xshell::{cmd, Shell};
+
+#[test]
+fn cli_splice_stdin() -> anyhow::Result<()> {
+    let sh = Shell::new()?;
+    let file_name = "cli_splice_stdin";
+    let tempdir = TempDir::new("{file_name}")?;
+    let wasi_file = test_utils::compile(&sh, &tempdir, &file_name)?;
+    let _ = fs::remove_dir_all("./tests/rundir/cli_splice_stdin");
+
+    let cmd = cmd!(sh, "node ./src/jco.js run  --jco-dir ./tests/rundir/cli_splice_stdin --jco-import ./tests/virtualenvs/base.js {wasi_file} hello this '' 'is an argument' 'with 🚩 emoji'");
+
+    let cmd = cmd
+        .env("JCO_RUN_PATH", "deno")
+        .env("JCO_RUN_ARGS", "run --importmap importmap.json -A");
+    cmd.run()?;
+    Ok(())
+}
diff --git a/tests/generated/cli_stdin.rs b/tests/generated/cli_stdin.rs
new file mode 100644
index 000000000..1dd5641c7
--- /dev/null
+++ b/tests/generated/cli_stdin.rs
@@ -0,0 +1,23 @@
+//! This file has been auto-generated, please do not modify manually
+//! To regenerate this file re-run `cargo xtask generate tests` from the project root
+
+use std::fs;
+use tempdir::TempDir;
+use xshell::{cmd, Shell};
+
+#[test]
+fn cli_stdin() -> anyhow::Result<()> {
+    let sh = Shell::new()?;
+    let file_name = "cli_stdin";
+    let tempdir = TempDir::new("{file_name}")?;
+    let wasi_file = test_utils::compile(&sh, &tempdir, &file_name)?;
+    let _ = fs::remove_dir_all("./tests/rundir/cli_stdin");
+
+    let cmd = cmd!(sh, "node ./src/jco.js run  --jco-dir ./tests/rundir/cli_stdin --jco-import ./tests/virtualenvs/base.js {wasi_file} hello this '' 'is an argument' 'with 🚩 emoji'");
+    let cmd = cmd.stdin(b"So rested he by the Tumtum tree");
+    let cmd = cmd
+        .env("JCO_RUN_PATH", "deno")
+        .env("JCO_RUN_ARGS", "run --importmap importmap.json -A");
+    cmd.run()?;
+    Ok(())
+}
diff --git a/tests/generated/cli_stdio_write_flushes.rs b/tests/generated/cli_stdio_write_flushes.rs
new file mode 100644
index 000000000..f9e5f5054
--- /dev/null
+++ b/tests/generated/cli_stdio_write_flushes.rs
@@ -0,0 +1,23 @@
+//! This file has been auto-generated, please do not modify manually
+//! To regenerate this file re-run `cargo xtask generate tests` from the project root
+
+use std::fs;
+use tempdir::TempDir;
+use xshell::{cmd, Shell};
+
+#[test]
+fn cli_stdio_write_flushes() -> anyhow::Result<()> {
+    let sh = Shell::new()?;
+    let file_name = "cli_stdio_write_flushes";
+    let tempdir = TempDir::new("{file_name}")?;
+    let wasi_file = test_utils::compile(&sh, &tempdir, &file_name)?;
+    let _ = fs::remove_dir_all("./tests/rundir/cli_stdio_write_flushes");
+
+    let cmd = cmd!(sh, "node ./src/jco.js run  --jco-dir ./tests/rundir/cli_stdio_write_flushes --jco-import ./tests/virtualenvs/base.js {wasi_file} hello this '' 'is an argument' 'with 🚩 emoji'");
+
+    let cmd = cmd
+        .env("JCO_RUN_PATH", "deno")
+        .env("JCO_RUN_ARGS", "run --importmap importmap.json -A");
+    cmd.run()?;
+    Ok(())
+}
diff --git a/tests/generated/http_outbound_request_content_length.rs b/tests/generated/http_outbound_request_content_length.rs
new file mode 100644
index 000000000..f72fcfaed
--- /dev/null
+++ b/tests/generated/http_outbound_request_content_length.rs
@@ -0,0 +1,23 @@
+//! This file has been auto-generated, please do not modify manually
+//! To regenerate this file re-run `cargo xtask generate tests` from the project root
+
+use std::fs;
+use tempdir::TempDir;
+use xshell::{cmd, Shell};
+
+#[test]
+fn http_outbound_request_content_length() -> anyhow::Result<()> {
+    let sh = Shell::new()?;
+    let file_name = "http_outbound_request_content_length";
+    let tempdir = TempDir::new("{file_name}")?;
+    let wasi_file = test_utils::compile(&sh, &tempdir, &file_name)?;
+    let _ = fs::remove_dir_all("./tests/rundir/http_outbound_request_content_length");
+
+    let cmd = cmd!(sh, "node ./src/jco.js run  --jco-dir ./tests/rundir/http_outbound_request_content_length --jco-import ./tests/virtualenvs/http.js {wasi_file} hello this '' 'is an argument' 'with 🚩 emoji'");
+
+    let cmd = cmd
+        .env("JCO_RUN_PATH", "deno")
+        .env("JCO_RUN_ARGS", "run --importmap importmap.json -A");
+    cmd.run()?;
+    Ok(())
+}
diff --git a/tests/generated/http_outbound_request_get.rs b/tests/generated/http_outbound_request_get.rs
new file mode 100644
index 000000000..2e1be5913
--- /dev/null
+++ b/tests/generated/http_outbound_request_get.rs
@@ -0,0 +1,23 @@
+//! This file has been auto-generated, please do not modify manually
+//! To regenerate this file re-run `cargo xtask generate tests` from the project root
+
+use std::fs;
+use tempdir::TempDir;
+use xshell::{cmd, Shell};
+
+#[test]
+fn http_outbound_request_get() -> anyhow::Result<()> {
+    let sh = Shell::new()?;
+    let file_name = "http_outbound_request_get";
+    let tempdir = TempDir::new("{file_name}")?;
+    let wasi_file = test_utils::compile(&sh, &tempdir, &file_name)?;
+    let _ = fs::remove_dir_all("./tests/rundir/http_outbound_request_get");
+
+    let cmd = cmd!(sh, "node ./src/jco.js run  --jco-dir ./tests/rundir/http_outbound_request_get --jco-import ./tests/virtualenvs/http.js {wasi_file} hello this '' 'is an argument' 'with 🚩 emoji'");
+
+    let cmd = cmd
+        .env("JCO_RUN_PATH", "deno")
+        .env("JCO_RUN_ARGS", "run --importmap importmap.json -A");
+    cmd.run()?;
+    Ok(())
+}
diff --git a/tests/generated/http_outbound_request_invalid_dnsname.rs b/tests/generated/http_outbound_request_invalid_dnsname.rs
new file mode 100644
index 000000000..84d21f167
--- /dev/null
+++ b/tests/generated/http_outbound_request_invalid_dnsname.rs
@@ -0,0 +1,23 @@
+//! This file has been auto-generated, please do not modify manually
+//! To regenerate this file re-run `cargo xtask generate tests` from the project root
+
+use std::fs;
+use tempdir::TempDir;
+use xshell::{cmd, Shell};
+
+#[test]
+fn http_outbound_request_invalid_dnsname() -> anyhow::Result<()> {
+    let sh = Shell::new()?;
+    let file_name = "http_outbound_request_invalid_dnsname";
+    let tempdir = TempDir::new("{file_name}")?;
+    let wasi_file = test_utils::compile(&sh, &tempdir, &file_name)?;
+    let _ = fs::remove_dir_all("./tests/rundir/http_outbound_request_invalid_dnsname");
+
+    let cmd = cmd!(sh, "node ./src/jco.js run  --jco-dir ./tests/rundir/http_outbound_request_invalid_dnsname --jco-import ./tests/virtualenvs/http.js {wasi_file} hello this '' 'is an argument' 'with 🚩 emoji'");
+
+    let cmd = cmd
+        .env("JCO_RUN_PATH", "deno")
+        .env("JCO_RUN_ARGS", "run --importmap importmap.json -A");
+    cmd.run()?;
+    Ok(())
+}
diff --git a/tests/generated/http_outbound_request_invalid_header.rs b/tests/generated/http_outbound_request_invalid_header.rs
new file mode 100644
index 000000000..49922ac8d
--- /dev/null
+++ b/tests/generated/http_outbound_request_invalid_header.rs
@@ -0,0 +1,23 @@
+//! This file has been auto-generated, please do not modify manually
+//! To regenerate this file re-run `cargo xtask generate tests` from the project root
+
+use std::fs;
+use tempdir::TempDir;
+use xshell::{cmd, Shell};
+
+#[test]
+fn http_outbound_request_invalid_header() -> anyhow::Result<()> {
+    let sh = Shell::new()?;
+    let file_name = "http_outbound_request_invalid_header";
+    let tempdir = TempDir::new("{file_name}")?;
+    let wasi_file = test_utils::compile(&sh, &tempdir, &file_name)?;
+    let _ = fs::remove_dir_all("./tests/rundir/http_outbound_request_invalid_header");
+
+    let cmd = cmd!(sh, "node ./src/jco.js run  --jco-dir ./tests/rundir/http_outbound_request_invalid_header --jco-import ./tests/virtualenvs/http.js {wasi_file} hello this '' 'is an argument' 'with 🚩 emoji'");
+
+    let cmd = cmd
+        .env("JCO_RUN_PATH", "deno")
+        .env("JCO_RUN_ARGS", "run --importmap importmap.json -A");
+    cmd.run()?;
+    Ok(())
+}
diff --git a/tests/generated/http_outbound_request_invalid_port.rs b/tests/generated/http_outbound_request_invalid_port.rs
new file mode 100644
index 000000000..1b64923ce
--- /dev/null
+++ b/tests/generated/http_outbound_request_invalid_port.rs
@@ -0,0 +1,23 @@
+//! This file has been auto-generated, please do not modify manually
+//! To regenerate this file re-run `cargo xtask generate tests` from the project root
+
+use std::fs;
+use tempdir::TempDir;
+use xshell::{cmd, Shell};
+
+#[test]
+fn http_outbound_request_invalid_port() -> anyhow::Result<()> {
+    let sh = Shell::new()?;
+    let file_name = "http_outbound_request_invalid_port";
+    let tempdir = TempDir::new("{file_name}")?;
+    let wasi_file = test_utils::compile(&sh, &tempdir, &file_name)?;
+    let _ = fs::remove_dir_all("./tests/rundir/http_outbound_request_invalid_port");
+
+    let cmd = cmd!(sh, "node ./src/jco.js run  --jco-dir ./tests/rundir/http_outbound_request_invalid_port --jco-import ./tests/virtualenvs/http.js {wasi_file} hello this '' 'is an argument' 'with 🚩 emoji'");
+
+    let cmd = cmd
+        .env("JCO_RUN_PATH", "deno")
+        .env("JCO_RUN_ARGS", "run --importmap importmap.json -A");
+    cmd.run()?;
+    Ok(())
+}
diff --git a/tests/generated/http_outbound_request_invalid_version.rs b/tests/generated/http_outbound_request_invalid_version.rs
new file mode 100644
index 000000000..513050f30
--- /dev/null
+++ b/tests/generated/http_outbound_request_invalid_version.rs
@@ -0,0 +1,23 @@
+//! This file has been auto-generated, please do not modify manually
+//! To regenerate this file re-run `cargo xtask generate tests` from the project root
+
+use std::fs;
+use tempdir::TempDir;
+use xshell::{cmd, Shell};
+
+#[test]
+fn http_outbound_request_invalid_version() -> anyhow::Result<()> {
+    let sh = Shell::new()?;
+    let file_name = "http_outbound_request_invalid_version";
+    let tempdir = TempDir::new("{file_name}")?;
+    let wasi_file = test_utils::compile(&sh, &tempdir, &file_name)?;
+    let _ = fs::remove_dir_all("./tests/rundir/http_outbound_request_invalid_version");
+
+    let cmd = cmd!(sh, "node ./src/jco.js run  --jco-dir ./tests/rundir/http_outbound_request_invalid_version --jco-import ./tests/virtualenvs/http.js {wasi_file} hello this '' 'is an argument' 'with 🚩 emoji'");
+
+    let cmd = cmd
+        .env("JCO_RUN_PATH", "deno")
+        .env("JCO_RUN_ARGS", "run --importmap importmap.json -A");
+    cmd.run()?;
+    Ok(())
+}
diff --git a/tests/generated/http_outbound_request_large_post.rs b/tests/generated/http_outbound_request_large_post.rs
new file mode 100644
index 000000000..2de24188b
--- /dev/null
+++ b/tests/generated/http_outbound_request_large_post.rs
@@ -0,0 +1,23 @@
+//! This file has been auto-generated, please do not modify manually
+//! To regenerate this file re-run `cargo xtask generate tests` from the project root
+
+use std::fs;
+use tempdir::TempDir;
+use xshell::{cmd, Shell};
+
+#[test]
+fn http_outbound_request_large_post() -> anyhow::Result<()> {
+    let sh = Shell::new()?;
+    let file_name = "http_outbound_request_large_post";
+    let tempdir = TempDir::new("{file_name}")?;
+    let wasi_file = test_utils::compile(&sh, &tempdir, &file_name)?;
+    let _ = fs::remove_dir_all("./tests/rundir/http_outbound_request_large_post");
+
+    let cmd = cmd!(sh, "node ./src/jco.js run  --jco-dir ./tests/rundir/http_outbound_request_large_post --jco-import ./tests/virtualenvs/http.js {wasi_file} hello this '' 'is an argument' 'with 🚩 emoji'");
+
+    let cmd = cmd
+        .env("JCO_RUN_PATH", "deno")
+        .env("JCO_RUN_ARGS", "run --importmap importmap.json -A");
+    cmd.run()?;
+    Ok(())
+}
diff --git a/tests/generated/http_outbound_request_post.rs b/tests/generated/http_outbound_request_post.rs
new file mode 100644
index 000000000..576437fa1
--- /dev/null
+++ b/tests/generated/http_outbound_request_post.rs
@@ -0,0 +1,23 @@
+//! This file has been auto-generated, please do not modify manually
+//! To regenerate this file re-run `cargo xtask generate tests` from the project root
+
+use std::fs;
+use tempdir::TempDir;
+use xshell::{cmd, Shell};
+
+#[test]
+fn http_outbound_request_post() -> anyhow::Result<()> {
+    let sh = Shell::new()?;
+    let file_name = "http_outbound_request_post";
+    let tempdir = TempDir::new("{file_name}")?;
+    let wasi_file = test_utils::compile(&sh, &tempdir, &file_name)?;
+    let _ = fs::remove_dir_all("./tests/rundir/http_outbound_request_post");
+
+    let cmd = cmd!(sh, "node ./src/jco.js run  --jco-dir ./tests/rundir/http_outbound_request_post --jco-import ./tests/virtualenvs/http.js {wasi_file} hello this '' 'is an argument' 'with 🚩 emoji'");
+
+    let cmd = cmd
+        .env("JCO_RUN_PATH", "deno")
+        .env("JCO_RUN_ARGS", "run --importmap importmap.json -A");
+    cmd.run()?;
+    Ok(())
+}
diff --git a/tests/generated/http_outbound_request_put.rs b/tests/generated/http_outbound_request_put.rs
new file mode 100644
index 000000000..c03e73952
--- /dev/null
+++ b/tests/generated/http_outbound_request_put.rs
@@ -0,0 +1,23 @@
+//! This file has been auto-generated, please do not modify manually
+//! To regenerate this file re-run `cargo xtask generate tests` from the project root
+
+use std::fs;
+use tempdir::TempDir;
+use xshell::{cmd, Shell};
+
+#[test]
+fn http_outbound_request_put() -> anyhow::Result<()> {
+    let sh = Shell::new()?;
+    let file_name = "http_outbound_request_put";
+    let tempdir = TempDir::new("{file_name}")?;
+    let wasi_file = test_utils::compile(&sh, &tempdir, &file_name)?;
+    let _ = fs::remove_dir_all("./tests/rundir/http_outbound_request_put");
+
+    let cmd = cmd!(sh, "node ./src/jco.js run  --jco-dir ./tests/rundir/http_outbound_request_put --jco-import ./tests/virtualenvs/http.js {wasi_file} hello this '' 'is an argument' 'with 🚩 emoji'");
+
+    let cmd = cmd
+        .env("JCO_RUN_PATH", "deno")
+        .env("JCO_RUN_ARGS", "run --importmap importmap.json -A");
+    cmd.run()?;
+    Ok(())
+}
diff --git a/tests/generated/http_outbound_request_response_build.rs b/tests/generated/http_outbound_request_response_build.rs
new file mode 100644
index 000000000..430e70c9d
--- /dev/null
+++ b/tests/generated/http_outbound_request_response_build.rs
@@ -0,0 +1,23 @@
+//! This file has been auto-generated, please do not modify manually
+//! To regenerate this file re-run `cargo xtask generate tests` from the project root
+
+use std::fs;
+use tempdir::TempDir;
+use xshell::{cmd, Shell};
+
+#[test]
+fn http_outbound_request_response_build() -> anyhow::Result<()> {
+    let sh = Shell::new()?;
+    let file_name = "http_outbound_request_response_build";
+    let tempdir = TempDir::new("{file_name}")?;
+    let wasi_file = test_utils::compile(&sh, &tempdir, &file_name)?;
+    let _ = fs::remove_dir_all("./tests/rundir/http_outbound_request_response_build");
+
+    let cmd = cmd!(sh, "node ./src/jco.js run  --jco-dir ./tests/rundir/http_outbound_request_response_build --jco-import ./tests/virtualenvs/http.js {wasi_file} hello this '' 'is an argument' 'with 🚩 emoji'");
+
+    let cmd = cmd
+        .env("JCO_RUN_PATH", "deno")
+        .env("JCO_RUN_ARGS", "run --importmap importmap.json -A");
+    cmd.run()?;
+    Ok(())
+}
diff --git a/tests/generated/http_outbound_request_unknown_method.rs b/tests/generated/http_outbound_request_unknown_method.rs
new file mode 100644
index 000000000..0295838b3
--- /dev/null
+++ b/tests/generated/http_outbound_request_unknown_method.rs
@@ -0,0 +1,23 @@
+//! This file has been auto-generated, please do not modify manually
+//! To regenerate this file re-run `cargo xtask generate tests` from the project root
+
+use std::fs;
+use tempdir::TempDir;
+use xshell::{cmd, Shell};
+
+#[test]
+fn http_outbound_request_unknown_method() -> anyhow::Result<()> {
+    let sh = Shell::new()?;
+    let file_name = "http_outbound_request_unknown_method";
+    let tempdir = TempDir::new("{file_name}")?;
+    let wasi_file = test_utils::compile(&sh, &tempdir, &file_name)?;
+    let _ = fs::remove_dir_all("./tests/rundir/http_outbound_request_unknown_method");
+
+    let cmd = cmd!(sh, "node ./src/jco.js run  --jco-dir ./tests/rundir/http_outbound_request_unknown_method --jco-import ./tests/virtualenvs/http.js {wasi_file} hello this '' 'is an argument' 'with 🚩 emoji'");
+
+    let cmd = cmd
+        .env("JCO_RUN_PATH", "deno")
+        .env("JCO_RUN_ARGS", "run --importmap importmap.json -A");
+    cmd.run()?;
+    Ok(())
+}
diff --git a/tests/generated/http_outbound_request_unsupported_scheme.rs b/tests/generated/http_outbound_request_unsupported_scheme.rs
new file mode 100644
index 000000000..c59efbd91
--- /dev/null
+++ b/tests/generated/http_outbound_request_unsupported_scheme.rs
@@ -0,0 +1,23 @@
+//! This file has been auto-generated, please do not modify manually
+//! To regenerate this file re-run `cargo xtask generate tests` from the project root
+
+use std::fs;
+use tempdir::TempDir;
+use xshell::{cmd, Shell};
+
+#[test]
+fn http_outbound_request_unsupported_scheme() -> anyhow::Result<()> {
+    let sh = Shell::new()?;
+    let file_name = "http_outbound_request_unsupported_scheme";
+    let tempdir = TempDir::new("{file_name}")?;
+    let wasi_file = test_utils::compile(&sh, &tempdir, &file_name)?;
+    let _ = fs::remove_dir_all("./tests/rundir/http_outbound_request_unsupported_scheme");
+
+    let cmd = cmd!(sh, "node ./src/jco.js run  --jco-dir ./tests/rundir/http_outbound_request_unsupported_scheme --jco-import ./tests/virtualenvs/http.js {wasi_file} hello this '' 'is an argument' 'with 🚩 emoji'");
+
+    let cmd = cmd
+        .env("JCO_RUN_PATH", "deno")
+        .env("JCO_RUN_ARGS", "run --importmap importmap.json -A");
+    cmd.run()?;
+    Ok(())
+}
diff --git a/tests/generated/preview1_big_random_buf.rs b/tests/generated/preview1_big_random_buf.rs
new file mode 100644
index 000000000..ce7c1fa55
--- /dev/null
+++ b/tests/generated/preview1_big_random_buf.rs
@@ -0,0 +1,23 @@
+//! This file has been auto-generated, please do not modify manually
+//! To regenerate this file re-run `cargo xtask generate tests` from the project root
+
+use std::fs;
+use tempdir::TempDir;
+use xshell::{cmd, Shell};
+
+#[test]
+fn preview1_big_random_buf() -> anyhow::Result<()> {
+    let sh = Shell::new()?;
+    let file_name = "preview1_big_random_buf";
+    let tempdir = TempDir::new("{file_name}")?;
+    let wasi_file = test_utils::compile(&sh, &tempdir, &file_name)?;
+    let _ = fs::remove_dir_all("./tests/rundir/preview1_big_random_buf");
+
+    let cmd = cmd!(sh, "node ./src/jco.js run  --jco-dir ./tests/rundir/preview1_big_random_buf --jco-import ./tests/virtualenvs/scratch.js {wasi_file} hello this '' 'is an argument' 'with 🚩 emoji'");
+
+    let cmd = cmd
+        .env("JCO_RUN_PATH", "deno")
+        .env("JCO_RUN_ARGS", "run --importmap importmap.json -A");
+    cmd.run()?;
+    Ok(())
+}
diff --git a/tests/generated/preview1_clock_time_get.rs b/tests/generated/preview1_clock_time_get.rs
new file mode 100644
index 000000000..8f86dd712
--- /dev/null
+++ b/tests/generated/preview1_clock_time_get.rs
@@ -0,0 +1,23 @@
+//! This file has been auto-generated, please do not modify manually
+//! To regenerate this file re-run `cargo xtask generate tests` from the project root
+
+use std::fs;
+use tempdir::TempDir;
+use xshell::{cmd, Shell};
+
+#[test]
+fn preview1_clock_time_get() -> anyhow::Result<()> {
+    let sh = Shell::new()?;
+    let file_name = "preview1_clock_time_get";
+    let tempdir = TempDir::new("{file_name}")?;
+    let wasi_file = test_utils::compile(&sh, &tempdir, &file_name)?;
+    let _ = fs::remove_dir_all("./tests/rundir/preview1_clock_time_get");
+
+    let cmd = cmd!(sh, "node ./src/jco.js run  --jco-dir ./tests/rundir/preview1_clock_time_get --jco-import ./tests/virtualenvs/scratch.js {wasi_file} hello this '' 'is an argument' 'with 🚩 emoji'");
+
+    let cmd = cmd
+        .env("JCO_RUN_PATH", "deno")
+        .env("JCO_RUN_ARGS", "run --importmap importmap.json -A");
+    cmd.run()?;
+    Ok(())
+}
diff --git a/tests/generated/preview1_close_preopen.rs b/tests/generated/preview1_close_preopen.rs
new file mode 100644
index 000000000..a0ce6d4e2
--- /dev/null
+++ b/tests/generated/preview1_close_preopen.rs
@@ -0,0 +1,23 @@
+//! This file has been auto-generated, please do not modify manually
+//! To regenerate this file re-run `cargo xtask generate tests` from the project root
+
+use std::fs;
+use tempdir::TempDir;
+use xshell::{cmd, Shell};
+
+#[test]
+fn preview1_close_preopen() -> anyhow::Result<()> {
+    let sh = Shell::new()?;
+    let file_name = "preview1_close_preopen";
+    let tempdir = TempDir::new("{file_name}")?;
+    let wasi_file = test_utils::compile(&sh, &tempdir, &file_name)?;
+    let _ = fs::remove_dir_all("./tests/rundir/preview1_close_preopen");
+
+    let cmd = cmd!(sh, "node ./src/jco.js run  --jco-dir ./tests/rundir/preview1_close_preopen --jco-import ./tests/virtualenvs/scratch.js {wasi_file} hello this '' 'is an argument' 'with 🚩 emoji'");
+
+    let cmd = cmd
+        .env("JCO_RUN_PATH", "deno")
+        .env("JCO_RUN_ARGS", "run --importmap importmap.json -A");
+    cmd.run()?;
+    Ok(())
+}
diff --git a/tests/generated/preview1_dangling_fd.rs b/tests/generated/preview1_dangling_fd.rs
new file mode 100644
index 000000000..038abcffd
--- /dev/null
+++ b/tests/generated/preview1_dangling_fd.rs
@@ -0,0 +1,23 @@
+//! This file has been auto-generated, please do not modify manually
+//! To regenerate this file re-run `cargo xtask generate tests` from the project root
+
+use std::fs;
+use tempdir::TempDir;
+use xshell::{cmd, Shell};
+
+#[test]
+fn preview1_dangling_fd() -> anyhow::Result<()> {
+    let sh = Shell::new()?;
+    let file_name = "preview1_dangling_fd";
+    let tempdir = TempDir::new("{file_name}")?;
+    let wasi_file = test_utils::compile(&sh, &tempdir, &file_name)?;
+    let _ = fs::remove_dir_all("./tests/rundir/preview1_dangling_fd");
+
+    let cmd = cmd!(sh, "node ./src/jco.js run  --jco-dir ./tests/rundir/preview1_dangling_fd --jco-import ./tests/virtualenvs/scratch.js {wasi_file} hello this '' 'is an argument' 'with 🚩 emoji'");
+
+    let cmd = cmd
+        .env("JCO_RUN_PATH", "deno")
+        .env("JCO_RUN_ARGS", "run --importmap importmap.json -A");
+    cmd.run()?;
+    Ok(())
+}
diff --git a/tests/generated/preview1_dangling_symlink.rs b/tests/generated/preview1_dangling_symlink.rs
new file mode 100644
index 000000000..1f6107013
--- /dev/null
+++ b/tests/generated/preview1_dangling_symlink.rs
@@ -0,0 +1,23 @@
+//! This file has been auto-generated, please do not modify manually
+//! To regenerate this file re-run `cargo xtask generate tests` from the project root
+
+use std::fs;
+use tempdir::TempDir;
+use xshell::{cmd, Shell};
+
+#[test]
+fn preview1_dangling_symlink() -> anyhow::Result<()> {
+    let sh = Shell::new()?;
+    let file_name = "preview1_dangling_symlink";
+    let tempdir = TempDir::new("{file_name}")?;
+    let wasi_file = test_utils::compile(&sh, &tempdir, &file_name)?;
+    let _ = fs::remove_dir_all("./tests/rundir/preview1_dangling_symlink");
+
+    let cmd = cmd!(sh, "node ./src/jco.js run  --jco-dir ./tests/rundir/preview1_dangling_symlink --jco-import ./tests/virtualenvs/scratch.js {wasi_file} hello this '' 'is an argument' 'with 🚩 emoji'");
+
+    let cmd = cmd
+        .env("JCO_RUN_PATH", "deno")
+        .env("JCO_RUN_ARGS", "run --importmap importmap.json -A");
+    cmd.run()?;
+    Ok(())
+}
diff --git a/tests/generated/preview1_dir_fd_op_failures.rs b/tests/generated/preview1_dir_fd_op_failures.rs
new file mode 100644
index 000000000..8ce3d3602
--- /dev/null
+++ b/tests/generated/preview1_dir_fd_op_failures.rs
@@ -0,0 +1,23 @@
+//! This file has been auto-generated, please do not modify manually
+//! To regenerate this file re-run `cargo xtask generate tests` from the project root
+
+use std::fs;
+use tempdir::TempDir;
+use xshell::{cmd, Shell};
+
+#[test]
+fn preview1_dir_fd_op_failures() -> anyhow::Result<()> {
+    let sh = Shell::new()?;
+    let file_name = "preview1_dir_fd_op_failures";
+    let tempdir = TempDir::new("{file_name}")?;
+    let wasi_file = test_utils::compile(&sh, &tempdir, &file_name)?;
+    let _ = fs::remove_dir_all("./tests/rundir/preview1_dir_fd_op_failures");
+
+    let cmd = cmd!(sh, "node ./src/jco.js run  --jco-dir ./tests/rundir/preview1_dir_fd_op_failures --jco-import ./tests/virtualenvs/scratch.js {wasi_file} hello this '' 'is an argument' 'with 🚩 emoji'");
+
+    let cmd = cmd
+        .env("JCO_RUN_PATH", "deno")
+        .env("JCO_RUN_ARGS", "run --importmap importmap.json -A");
+    cmd.run()?;
+    Ok(())
+}
diff --git a/tests/generated/preview1_directory_seek.rs b/tests/generated/preview1_directory_seek.rs
new file mode 100644
index 000000000..1b79268a4
--- /dev/null
+++ b/tests/generated/preview1_directory_seek.rs
@@ -0,0 +1,23 @@
+//! This file has been auto-generated, please do not modify manually
+//! To regenerate this file re-run `cargo xtask generate tests` from the project root
+
+use std::fs;
+use tempdir::TempDir;
+use xshell::{cmd, Shell};
+
+#[test]
+fn preview1_directory_seek() -> anyhow::Result<()> {
+    let sh = Shell::new()?;
+    let file_name = "preview1_directory_seek";
+    let tempdir = TempDir::new("{file_name}")?;
+    let wasi_file = test_utils::compile(&sh, &tempdir, &file_name)?;
+    let _ = fs::remove_dir_all("./tests/rundir/preview1_directory_seek");
+
+    let cmd = cmd!(sh, "node ./src/jco.js run  --jco-dir ./tests/rundir/preview1_directory_seek --jco-import ./tests/virtualenvs/scratch.js {wasi_file} hello this '' 'is an argument' 'with 🚩 emoji'");
+
+    let cmd = cmd
+        .env("JCO_RUN_PATH", "deno")
+        .env("JCO_RUN_ARGS", "run --importmap importmap.json -A");
+    cmd.run()?;
+    Ok(())
+}
diff --git a/tests/generated/preview1_fd_advise.rs b/tests/generated/preview1_fd_advise.rs
new file mode 100644
index 000000000..174752d46
--- /dev/null
+++ b/tests/generated/preview1_fd_advise.rs
@@ -0,0 +1,23 @@
+//! This file has been auto-generated, please do not modify manually
+//! To regenerate this file re-run `cargo xtask generate tests` from the project root
+
+use std::fs;
+use tempdir::TempDir;
+use xshell::{cmd, Shell};
+
+#[test]
+fn preview1_fd_advise() -> anyhow::Result<()> {
+    let sh = Shell::new()?;
+    let file_name = "preview1_fd_advise";
+    let tempdir = TempDir::new("{file_name}")?;
+    let wasi_file = test_utils::compile(&sh, &tempdir, &file_name)?;
+    let _ = fs::remove_dir_all("./tests/rundir/preview1_fd_advise");
+
+    let cmd = cmd!(sh, "node ./src/jco.js run  --jco-dir ./tests/rundir/preview1_fd_advise --jco-import ./tests/virtualenvs/scratch.js {wasi_file} hello this '' 'is an argument' 'with 🚩 emoji'");
+
+    let cmd = cmd
+        .env("JCO_RUN_PATH", "deno")
+        .env("JCO_RUN_ARGS", "run --importmap importmap.json -A");
+    cmd.run()?;
+    Ok(())
+}
diff --git a/tests/generated/preview1_fd_filestat_get.rs b/tests/generated/preview1_fd_filestat_get.rs
new file mode 100644
index 000000000..132a39bbf
--- /dev/null
+++ b/tests/generated/preview1_fd_filestat_get.rs
@@ -0,0 +1,23 @@
+//! This file has been auto-generated, please do not modify manually
+//! To regenerate this file re-run `cargo xtask generate tests` from the project root
+
+use std::fs;
+use tempdir::TempDir;
+use xshell::{cmd, Shell};
+
+#[test]
+fn preview1_fd_filestat_get() -> anyhow::Result<()> {
+    let sh = Shell::new()?;
+    let file_name = "preview1_fd_filestat_get";
+    let tempdir = TempDir::new("{file_name}")?;
+    let wasi_file = test_utils::compile(&sh, &tempdir, &file_name)?;
+    let _ = fs::remove_dir_all("./tests/rundir/preview1_fd_filestat_get");
+
+    let cmd = cmd!(sh, "node ./src/jco.js run  --jco-dir ./tests/rundir/preview1_fd_filestat_get --jco-import ./tests/virtualenvs/scratch.js {wasi_file} hello this '' 'is an argument' 'with 🚩 emoji'");
+
+    let cmd = cmd
+        .env("JCO_RUN_PATH", "deno")
+        .env("JCO_RUN_ARGS", "run --importmap importmap.json -A");
+    cmd.run()?;
+    Ok(())
+}
diff --git a/tests/generated/preview1_fd_filestat_set.rs b/tests/generated/preview1_fd_filestat_set.rs
new file mode 100644
index 000000000..eeb4517a2
--- /dev/null
+++ b/tests/generated/preview1_fd_filestat_set.rs
@@ -0,0 +1,23 @@
+//! This file has been auto-generated, please do not modify manually
+//! To regenerate this file re-run `cargo xtask generate tests` from the project root
+
+use std::fs;
+use tempdir::TempDir;
+use xshell::{cmd, Shell};
+
+#[test]
+fn preview1_fd_filestat_set() -> anyhow::Result<()> {
+    let sh = Shell::new()?;
+    let file_name = "preview1_fd_filestat_set";
+    let tempdir = TempDir::new("{file_name}")?;
+    let wasi_file = test_utils::compile(&sh, &tempdir, &file_name)?;
+    let _ = fs::remove_dir_all("./tests/rundir/preview1_fd_filestat_set");
+
+    let cmd = cmd!(sh, "node ./src/jco.js run  --jco-dir ./tests/rundir/preview1_fd_filestat_set --jco-import ./tests/virtualenvs/scratch.js {wasi_file} hello this '' 'is an argument' 'with 🚩 emoji'");
+
+    let cmd = cmd
+        .env("JCO_RUN_PATH", "deno")
+        .env("JCO_RUN_ARGS", "run --importmap importmap.json -A");
+    cmd.run()?;
+    Ok(())
+}
diff --git a/tests/generated/preview1_fd_flags_set.rs b/tests/generated/preview1_fd_flags_set.rs
new file mode 100644
index 000000000..6d1990898
--- /dev/null
+++ b/tests/generated/preview1_fd_flags_set.rs
@@ -0,0 +1,23 @@
+//! This file has been auto-generated, please do not modify manually
+//! To regenerate this file re-run `cargo xtask generate tests` from the project root
+
+use std::fs;
+use tempdir::TempDir;
+use xshell::{cmd, Shell};
+
+#[test]
+fn preview1_fd_flags_set() -> anyhow::Result<()> {
+    let sh = Shell::new()?;
+    let file_name = "preview1_fd_flags_set";
+    let tempdir = TempDir::new("{file_name}")?;
+    let wasi_file = test_utils::compile(&sh, &tempdir, &file_name)?;
+    let _ = fs::remove_dir_all("./tests/rundir/preview1_fd_flags_set");
+
+    let cmd = cmd!(sh, "node ./src/jco.js run  --jco-dir ./tests/rundir/preview1_fd_flags_set --jco-import ./tests/virtualenvs/scratch.js {wasi_file} hello this '' 'is an argument' 'with 🚩 emoji'");
+
+    let cmd = cmd
+        .env("JCO_RUN_PATH", "deno")
+        .env("JCO_RUN_ARGS", "run --importmap importmap.json -A");
+    cmd.run()?;
+    Ok(())
+}
diff --git a/tests/generated/preview1_fd_readdir.rs b/tests/generated/preview1_fd_readdir.rs
new file mode 100644
index 000000000..bdd56e86c
--- /dev/null
+++ b/tests/generated/preview1_fd_readdir.rs
@@ -0,0 +1,23 @@
+//! This file has been auto-generated, please do not modify manually
+//! To regenerate this file re-run `cargo xtask generate tests` from the project root
+
+use std::fs;
+use tempdir::TempDir;
+use xshell::{cmd, Shell};
+
+#[test]
+fn preview1_fd_readdir() -> anyhow::Result<()> {
+    let sh = Shell::new()?;
+    let file_name = "preview1_fd_readdir";
+    let tempdir = TempDir::new("{file_name}")?;
+    let wasi_file = test_utils::compile(&sh, &tempdir, &file_name)?;
+    let _ = fs::remove_dir_all("./tests/rundir/preview1_fd_readdir");
+
+    let cmd = cmd!(sh, "node ./src/jco.js run  --jco-dir ./tests/rundir/preview1_fd_readdir --jco-import ./tests/virtualenvs/scratch.js {wasi_file} hello this '' 'is an argument' 'with 🚩 emoji'");
+
+    let cmd = cmd
+        .env("JCO_RUN_PATH", "deno")
+        .env("JCO_RUN_ARGS", "run --importmap importmap.json -A");
+    cmd.run()?;
+    Ok(())
+}
diff --git a/tests/generated/preview1_file_allocate.rs b/tests/generated/preview1_file_allocate.rs
new file mode 100644
index 000000000..a8ba2a443
--- /dev/null
+++ b/tests/generated/preview1_file_allocate.rs
@@ -0,0 +1,23 @@
+//! This file has been auto-generated, please do not modify manually
+//! To regenerate this file re-run `cargo xtask generate tests` from the project root
+
+use std::fs;
+use tempdir::TempDir;
+use xshell::{cmd, Shell};
+
+#[test]
+fn preview1_file_allocate() -> anyhow::Result<()> {
+    let sh = Shell::new()?;
+    let file_name = "preview1_file_allocate";
+    let tempdir = TempDir::new("{file_name}")?;
+    let wasi_file = test_utils::compile(&sh, &tempdir, &file_name)?;
+    let _ = fs::remove_dir_all("./tests/rundir/preview1_file_allocate");
+
+    let cmd = cmd!(sh, "node ./src/jco.js run  --jco-dir ./tests/rundir/preview1_file_allocate --jco-import ./tests/virtualenvs/scratch.js {wasi_file} hello this '' 'is an argument' 'with 🚩 emoji'");
+
+    let cmd = cmd
+        .env("JCO_RUN_PATH", "deno")
+        .env("JCO_RUN_ARGS", "run --importmap importmap.json -A");
+    cmd.run()?;
+    Ok(())
+}
diff --git a/tests/generated/preview1_file_pread_pwrite.rs b/tests/generated/preview1_file_pread_pwrite.rs
new file mode 100644
index 000000000..3a0b69d39
--- /dev/null
+++ b/tests/generated/preview1_file_pread_pwrite.rs
@@ -0,0 +1,23 @@
+//! This file has been auto-generated, please do not modify manually
+//! To regenerate this file re-run `cargo xtask generate tests` from the project root
+
+use std::fs;
+use tempdir::TempDir;
+use xshell::{cmd, Shell};
+
+#[test]
+fn preview1_file_pread_pwrite() -> anyhow::Result<()> {
+    let sh = Shell::new()?;
+    let file_name = "preview1_file_pread_pwrite";
+    let tempdir = TempDir::new("{file_name}")?;
+    let wasi_file = test_utils::compile(&sh, &tempdir, &file_name)?;
+    let _ = fs::remove_dir_all("./tests/rundir/preview1_file_pread_pwrite");
+
+    let cmd = cmd!(sh, "node ./src/jco.js run  --jco-dir ./tests/rundir/preview1_file_pread_pwrite --jco-import ./tests/virtualenvs/scratch.js {wasi_file} hello this '' 'is an argument' 'with 🚩 emoji'");
+
+    let cmd = cmd
+        .env("JCO_RUN_PATH", "deno")
+        .env("JCO_RUN_ARGS", "run --importmap importmap.json -A");
+    cmd.run()?;
+    Ok(())
+}
diff --git a/tests/generated/preview1_file_seek_tell.rs b/tests/generated/preview1_file_seek_tell.rs
new file mode 100644
index 000000000..049f14326
--- /dev/null
+++ b/tests/generated/preview1_file_seek_tell.rs
@@ -0,0 +1,23 @@
+//! This file has been auto-generated, please do not modify manually
+//! To regenerate this file re-run `cargo xtask generate tests` from the project root
+
+use std::fs;
+use tempdir::TempDir;
+use xshell::{cmd, Shell};
+
+#[test]
+fn preview1_file_seek_tell() -> anyhow::Result<()> {
+    let sh = Shell::new()?;
+    let file_name = "preview1_file_seek_tell";
+    let tempdir = TempDir::new("{file_name}")?;
+    let wasi_file = test_utils::compile(&sh, &tempdir, &file_name)?;
+    let _ = fs::remove_dir_all("./tests/rundir/preview1_file_seek_tell");
+
+    let cmd = cmd!(sh, "node ./src/jco.js run  --jco-dir ./tests/rundir/preview1_file_seek_tell --jco-import ./tests/virtualenvs/scratch.js {wasi_file} hello this '' 'is an argument' 'with 🚩 emoji'");
+
+    let cmd = cmd
+        .env("JCO_RUN_PATH", "deno")
+        .env("JCO_RUN_ARGS", "run --importmap importmap.json -A");
+    cmd.run()?;
+    Ok(())
+}
diff --git a/tests/generated/preview1_file_truncation.rs b/tests/generated/preview1_file_truncation.rs
new file mode 100644
index 000000000..71b72c8dd
--- /dev/null
+++ b/tests/generated/preview1_file_truncation.rs
@@ -0,0 +1,23 @@
+//! This file has been auto-generated, please do not modify manually
+//! To regenerate this file re-run `cargo xtask generate tests` from the project root
+
+use std::fs;
+use tempdir::TempDir;
+use xshell::{cmd, Shell};
+
+#[test]
+fn preview1_file_truncation() -> anyhow::Result<()> {
+    let sh = Shell::new()?;
+    let file_name = "preview1_file_truncation";
+    let tempdir = TempDir::new("{file_name}")?;
+    let wasi_file = test_utils::compile(&sh, &tempdir, &file_name)?;
+    let _ = fs::remove_dir_all("./tests/rundir/preview1_file_truncation");
+
+    let cmd = cmd!(sh, "node ./src/jco.js run  --jco-dir ./tests/rundir/preview1_file_truncation --jco-import ./tests/virtualenvs/scratch.js {wasi_file} hello this '' 'is an argument' 'with 🚩 emoji'");
+
+    let cmd = cmd
+        .env("JCO_RUN_PATH", "deno")
+        .env("JCO_RUN_ARGS", "run --importmap importmap.json -A");
+    cmd.run()?;
+    Ok(())
+}
diff --git a/tests/generated/preview1_file_unbuffered_write.rs b/tests/generated/preview1_file_unbuffered_write.rs
new file mode 100644
index 000000000..642677a70
--- /dev/null
+++ b/tests/generated/preview1_file_unbuffered_write.rs
@@ -0,0 +1,23 @@
+//! This file has been auto-generated, please do not modify manually
+//! To regenerate this file re-run `cargo xtask generate tests` from the project root
+
+use std::fs;
+use tempdir::TempDir;
+use xshell::{cmd, Shell};
+
+#[test]
+fn preview1_file_unbuffered_write() -> anyhow::Result<()> {
+    let sh = Shell::new()?;
+    let file_name = "preview1_file_unbuffered_write";
+    let tempdir = TempDir::new("{file_name}")?;
+    let wasi_file = test_utils::compile(&sh, &tempdir, &file_name)?;
+    let _ = fs::remove_dir_all("./tests/rundir/preview1_file_unbuffered_write");
+
+    let cmd = cmd!(sh, "node ./src/jco.js run  --jco-dir ./tests/rundir/preview1_file_unbuffered_write --jco-import ./tests/virtualenvs/scratch.js {wasi_file} hello this '' 'is an argument' 'with 🚩 emoji'");
+
+    let cmd = cmd
+        .env("JCO_RUN_PATH", "deno")
+        .env("JCO_RUN_ARGS", "run --importmap importmap.json -A");
+    cmd.run()?;
+    Ok(())
+}
diff --git a/tests/generated/preview1_file_write.rs b/tests/generated/preview1_file_write.rs
new file mode 100644
index 000000000..b6e8fc633
--- /dev/null
+++ b/tests/generated/preview1_file_write.rs
@@ -0,0 +1,23 @@
+//! This file has been auto-generated, please do not modify manually
+//! To regenerate this file re-run `cargo xtask generate tests` from the project root
+
+use std::fs;
+use tempdir::TempDir;
+use xshell::{cmd, Shell};
+
+#[test]
+fn preview1_file_write() -> anyhow::Result<()> {
+    let sh = Shell::new()?;
+    let file_name = "preview1_file_write";
+    let tempdir = TempDir::new("{file_name}")?;
+    let wasi_file = test_utils::compile(&sh, &tempdir, &file_name)?;
+    let _ = fs::remove_dir_all("./tests/rundir/preview1_file_write");
+
+    let cmd = cmd!(sh, "node ./src/jco.js run  --jco-dir ./tests/rundir/preview1_file_write --jco-import ./tests/virtualenvs/scratch.js {wasi_file} hello this '' 'is an argument' 'with 🚩 emoji'");
+
+    let cmd = cmd
+        .env("JCO_RUN_PATH", "deno")
+        .env("JCO_RUN_ARGS", "run --importmap importmap.json -A");
+    cmd.run()?;
+    Ok(())
+}
diff --git a/tests/generated/preview1_interesting_paths.rs b/tests/generated/preview1_interesting_paths.rs
new file mode 100644
index 000000000..8dd19c495
--- /dev/null
+++ b/tests/generated/preview1_interesting_paths.rs
@@ -0,0 +1,23 @@
+//! This file has been auto-generated, please do not modify manually
+//! To regenerate this file re-run `cargo xtask generate tests` from the project root
+
+use std::fs;
+use tempdir::TempDir;
+use xshell::{cmd, Shell};
+
+#[test]
+fn preview1_interesting_paths() -> anyhow::Result<()> {
+    let sh = Shell::new()?;
+    let file_name = "preview1_interesting_paths";
+    let tempdir = TempDir::new("{file_name}")?;
+    let wasi_file = test_utils::compile(&sh, &tempdir, &file_name)?;
+    let _ = fs::remove_dir_all("./tests/rundir/preview1_interesting_paths");
+
+    let cmd = cmd!(sh, "node ./src/jco.js run  --jco-dir ./tests/rundir/preview1_interesting_paths --jco-import ./tests/virtualenvs/scratch.js {wasi_file} hello this '' 'is an argument' 'with 🚩 emoji'");
+
+    let cmd = cmd
+        .env("JCO_RUN_PATH", "deno")
+        .env("JCO_RUN_ARGS", "run --importmap importmap.json -A");
+    cmd.run()?;
+    Ok(())
+}
diff --git a/tests/generated/preview1_nofollow_errors.rs b/tests/generated/preview1_nofollow_errors.rs
new file mode 100644
index 000000000..7641aaf53
--- /dev/null
+++ b/tests/generated/preview1_nofollow_errors.rs
@@ -0,0 +1,23 @@
+//! This file has been auto-generated, please do not modify manually
+//! To regenerate this file re-run `cargo xtask generate tests` from the project root
+
+use std::fs;
+use tempdir::TempDir;
+use xshell::{cmd, Shell};
+
+#[test]
+fn preview1_nofollow_errors() -> anyhow::Result<()> {
+    let sh = Shell::new()?;
+    let file_name = "preview1_nofollow_errors";
+    let tempdir = TempDir::new("{file_name}")?;
+    let wasi_file = test_utils::compile(&sh, &tempdir, &file_name)?;
+    let _ = fs::remove_dir_all("./tests/rundir/preview1_nofollow_errors");
+
+    let cmd = cmd!(sh, "node ./src/jco.js run  --jco-dir ./tests/rundir/preview1_nofollow_errors --jco-import ./tests/virtualenvs/scratch.js {wasi_file} hello this '' 'is an argument' 'with 🚩 emoji'");
+
+    let cmd = cmd
+        .env("JCO_RUN_PATH", "deno")
+        .env("JCO_RUN_ARGS", "run --importmap importmap.json -A");
+    cmd.run()?;
+    Ok(())
+}
diff --git a/tests/generated/preview1_overwrite_preopen.rs b/tests/generated/preview1_overwrite_preopen.rs
new file mode 100644
index 000000000..3ec62c0a8
--- /dev/null
+++ b/tests/generated/preview1_overwrite_preopen.rs
@@ -0,0 +1,23 @@
+//! This file has been auto-generated, please do not modify manually
+//! To regenerate this file re-run `cargo xtask generate tests` from the project root
+
+use std::fs;
+use tempdir::TempDir;
+use xshell::{cmd, Shell};
+
+#[test]
+fn preview1_overwrite_preopen() -> anyhow::Result<()> {
+    let sh = Shell::new()?;
+    let file_name = "preview1_overwrite_preopen";
+    let tempdir = TempDir::new("{file_name}")?;
+    let wasi_file = test_utils::compile(&sh, &tempdir, &file_name)?;
+    let _ = fs::remove_dir_all("./tests/rundir/preview1_overwrite_preopen");
+
+    let cmd = cmd!(sh, "node ./src/jco.js run  --jco-dir ./tests/rundir/preview1_overwrite_preopen --jco-import ./tests/virtualenvs/scratch.js {wasi_file} hello this '' 'is an argument' 'with 🚩 emoji'");
+
+    let cmd = cmd
+        .env("JCO_RUN_PATH", "deno")
+        .env("JCO_RUN_ARGS", "run --importmap importmap.json -A");
+    cmd.run()?;
+    Ok(())
+}
diff --git a/tests/generated/preview1_path_exists.rs b/tests/generated/preview1_path_exists.rs
new file mode 100644
index 000000000..d7b7fae5a
--- /dev/null
+++ b/tests/generated/preview1_path_exists.rs
@@ -0,0 +1,23 @@
+//! This file has been auto-generated, please do not modify manually
+//! To regenerate this file re-run `cargo xtask generate tests` from the project root
+
+use std::fs;
+use tempdir::TempDir;
+use xshell::{cmd, Shell};
+
+#[test]
+fn preview1_path_exists() -> anyhow::Result<()> {
+    let sh = Shell::new()?;
+    let file_name = "preview1_path_exists";
+    let tempdir = TempDir::new("{file_name}")?;
+    let wasi_file = test_utils::compile(&sh, &tempdir, &file_name)?;
+    let _ = fs::remove_dir_all("./tests/rundir/preview1_path_exists");
+
+    let cmd = cmd!(sh, "node ./src/jco.js run  --jco-dir ./tests/rundir/preview1_path_exists --jco-import ./tests/virtualenvs/scratch.js {wasi_file} hello this '' 'is an argument' 'with 🚩 emoji'");
+
+    let cmd = cmd
+        .env("JCO_RUN_PATH", "deno")
+        .env("JCO_RUN_ARGS", "run --importmap importmap.json -A");
+    cmd.run()?;
+    Ok(())
+}
diff --git a/tests/generated/preview1_path_filestat.rs b/tests/generated/preview1_path_filestat.rs
new file mode 100644
index 000000000..3b25537f0
--- /dev/null
+++ b/tests/generated/preview1_path_filestat.rs
@@ -0,0 +1,23 @@
+//! This file has been auto-generated, please do not modify manually
+//! To regenerate this file re-run `cargo xtask generate tests` from the project root
+
+use std::fs;
+use tempdir::TempDir;
+use xshell::{cmd, Shell};
+
+#[test]
+fn preview1_path_filestat() -> anyhow::Result<()> {
+    let sh = Shell::new()?;
+    let file_name = "preview1_path_filestat";
+    let tempdir = TempDir::new("{file_name}")?;
+    let wasi_file = test_utils::compile(&sh, &tempdir, &file_name)?;
+    let _ = fs::remove_dir_all("./tests/rundir/preview1_path_filestat");
+
+    let cmd = cmd!(sh, "node ./src/jco.js run  --jco-dir ./tests/rundir/preview1_path_filestat --jco-import ./tests/virtualenvs/scratch.js {wasi_file} hello this '' 'is an argument' 'with 🚩 emoji'");
+
+    let cmd = cmd
+        .env("JCO_RUN_PATH", "deno")
+        .env("JCO_RUN_ARGS", "run --importmap importmap.json -A");
+    cmd.run()?;
+    Ok(())
+}
diff --git a/tests/generated/preview1_path_link.rs b/tests/generated/preview1_path_link.rs
new file mode 100644
index 000000000..177033fc4
--- /dev/null
+++ b/tests/generated/preview1_path_link.rs
@@ -0,0 +1,23 @@
+//! This file has been auto-generated, please do not modify manually
+//! To regenerate this file re-run `cargo xtask generate tests` from the project root
+
+use std::fs;
+use tempdir::TempDir;
+use xshell::{cmd, Shell};
+
+#[test]
+fn preview1_path_link() -> anyhow::Result<()> {
+    let sh = Shell::new()?;
+    let file_name = "preview1_path_link";
+    let tempdir = TempDir::new("{file_name}")?;
+    let wasi_file = test_utils::compile(&sh, &tempdir, &file_name)?;
+    let _ = fs::remove_dir_all("./tests/rundir/preview1_path_link");
+
+    let cmd = cmd!(sh, "node ./src/jco.js run  --jco-dir ./tests/rundir/preview1_path_link --jco-import ./tests/virtualenvs/scratch.js {wasi_file} hello this '' 'is an argument' 'with 🚩 emoji'");
+
+    let cmd = cmd
+        .env("JCO_RUN_PATH", "deno")
+        .env("JCO_RUN_ARGS", "run --importmap importmap.json -A");
+    cmd.run()?;
+    Ok(())
+}
diff --git a/tests/generated/preview1_path_open_create_existing.rs b/tests/generated/preview1_path_open_create_existing.rs
new file mode 100644
index 000000000..23dde7107
--- /dev/null
+++ b/tests/generated/preview1_path_open_create_existing.rs
@@ -0,0 +1,23 @@
+//! This file has been auto-generated, please do not modify manually
+//! To regenerate this file re-run `cargo xtask generate tests` from the project root
+
+use std::fs;
+use tempdir::TempDir;
+use xshell::{cmd, Shell};
+
+#[test]
+fn preview1_path_open_create_existing() -> anyhow::Result<()> {
+    let sh = Shell::new()?;
+    let file_name = "preview1_path_open_create_existing";
+    let tempdir = TempDir::new("{file_name}")?;
+    let wasi_file = test_utils::compile(&sh, &tempdir, &file_name)?;
+    let _ = fs::remove_dir_all("./tests/rundir/preview1_path_open_create_existing");
+
+    let cmd = cmd!(sh, "node ./src/jco.js run  --jco-dir ./tests/rundir/preview1_path_open_create_existing --jco-import ./tests/virtualenvs/scratch.js {wasi_file} hello this '' 'is an argument' 'with 🚩 emoji'");
+
+    let cmd = cmd
+        .env("JCO_RUN_PATH", "deno")
+        .env("JCO_RUN_ARGS", "run --importmap importmap.json -A");
+    cmd.run()?;
+    Ok(())
+}
diff --git a/tests/generated/preview1_path_open_dirfd_not_dir.rs b/tests/generated/preview1_path_open_dirfd_not_dir.rs
new file mode 100644
index 000000000..df82f76dd
--- /dev/null
+++ b/tests/generated/preview1_path_open_dirfd_not_dir.rs
@@ -0,0 +1,23 @@
+//! This file has been auto-generated, please do not modify manually
+//! To regenerate this file re-run `cargo xtask generate tests` from the project root
+
+use std::fs;
+use tempdir::TempDir;
+use xshell::{cmd, Shell};
+
+#[test]
+fn preview1_path_open_dirfd_not_dir() -> anyhow::Result<()> {
+    let sh = Shell::new()?;
+    let file_name = "preview1_path_open_dirfd_not_dir";
+    let tempdir = TempDir::new("{file_name}")?;
+    let wasi_file = test_utils::compile(&sh, &tempdir, &file_name)?;
+    let _ = fs::remove_dir_all("./tests/rundir/preview1_path_open_dirfd_not_dir");
+
+    let cmd = cmd!(sh, "node ./src/jco.js run  --jco-dir ./tests/rundir/preview1_path_open_dirfd_not_dir --jco-import ./tests/virtualenvs/scratch.js {wasi_file} hello this '' 'is an argument' 'with 🚩 emoji'");
+
+    let cmd = cmd
+        .env("JCO_RUN_PATH", "deno")
+        .env("JCO_RUN_ARGS", "run --importmap importmap.json -A");
+    cmd.run()?;
+    Ok(())
+}
diff --git a/tests/generated/preview1_path_open_missing.rs b/tests/generated/preview1_path_open_missing.rs
new file mode 100644
index 000000000..9ca0e97d9
--- /dev/null
+++ b/tests/generated/preview1_path_open_missing.rs
@@ -0,0 +1,23 @@
+//! This file has been auto-generated, please do not modify manually
+//! To regenerate this file re-run `cargo xtask generate tests` from the project root
+
+use std::fs;
+use tempdir::TempDir;
+use xshell::{cmd, Shell};
+
+#[test]
+fn preview1_path_open_missing() -> anyhow::Result<()> {
+    let sh = Shell::new()?;
+    let file_name = "preview1_path_open_missing";
+    let tempdir = TempDir::new("{file_name}")?;
+    let wasi_file = test_utils::compile(&sh, &tempdir, &file_name)?;
+    let _ = fs::remove_dir_all("./tests/rundir/preview1_path_open_missing");
+
+    let cmd = cmd!(sh, "node ./src/jco.js run  --jco-dir ./tests/rundir/preview1_path_open_missing --jco-import ./tests/virtualenvs/scratch.js {wasi_file} hello this '' 'is an argument' 'with 🚩 emoji'");
+
+    let cmd = cmd
+        .env("JCO_RUN_PATH", "deno")
+        .env("JCO_RUN_ARGS", "run --importmap importmap.json -A");
+    cmd.run()?;
+    Ok(())
+}
diff --git a/tests/generated/preview1_path_open_nonblock.rs b/tests/generated/preview1_path_open_nonblock.rs
new file mode 100644
index 000000000..a31c1396b
--- /dev/null
+++ b/tests/generated/preview1_path_open_nonblock.rs
@@ -0,0 +1,23 @@
+//! This file has been auto-generated, please do not modify manually
+//! To regenerate this file re-run `cargo xtask generate tests` from the project root
+
+use std::fs;
+use tempdir::TempDir;
+use xshell::{cmd, Shell};
+
+#[test]
+fn preview1_path_open_nonblock() -> anyhow::Result<()> {
+    let sh = Shell::new()?;
+    let file_name = "preview1_path_open_nonblock";
+    let tempdir = TempDir::new("{file_name}")?;
+    let wasi_file = test_utils::compile(&sh, &tempdir, &file_name)?;
+    let _ = fs::remove_dir_all("./tests/rundir/preview1_path_open_nonblock");
+
+    let cmd = cmd!(sh, "node ./src/jco.js run  --jco-dir ./tests/rundir/preview1_path_open_nonblock --jco-import ./tests/virtualenvs/scratch.js {wasi_file} hello this '' 'is an argument' 'with 🚩 emoji'");
+
+    let cmd = cmd
+        .env("JCO_RUN_PATH", "deno")
+        .env("JCO_RUN_ARGS", "run --importmap importmap.json -A");
+    cmd.run()?;
+    Ok(())
+}
diff --git a/tests/generated/preview1_path_open_preopen.rs b/tests/generated/preview1_path_open_preopen.rs
new file mode 100644
index 000000000..a79fe37c8
--- /dev/null
+++ b/tests/generated/preview1_path_open_preopen.rs
@@ -0,0 +1,23 @@
+//! This file has been auto-generated, please do not modify manually
+//! To regenerate this file re-run `cargo xtask generate tests` from the project root
+
+use std::fs;
+use tempdir::TempDir;
+use xshell::{cmd, Shell};
+
+#[test]
+fn preview1_path_open_preopen() -> anyhow::Result<()> {
+    let sh = Shell::new()?;
+    let file_name = "preview1_path_open_preopen";
+    let tempdir = TempDir::new("{file_name}")?;
+    let wasi_file = test_utils::compile(&sh, &tempdir, &file_name)?;
+    let _ = fs::remove_dir_all("./tests/rundir/preview1_path_open_preopen");
+
+    let cmd = cmd!(sh, "node ./src/jco.js run  --jco-dir ./tests/rundir/preview1_path_open_preopen --jco-import ./tests/virtualenvs/scratch.js {wasi_file} hello this '' 'is an argument' 'with 🚩 emoji'");
+
+    let cmd = cmd
+        .env("JCO_RUN_PATH", "deno")
+        .env("JCO_RUN_ARGS", "run --importmap importmap.json -A");
+    cmd.run()?;
+    Ok(())
+}
diff --git a/tests/generated/preview1_path_open_read_write.rs b/tests/generated/preview1_path_open_read_write.rs
new file mode 100644
index 000000000..d984108be
--- /dev/null
+++ b/tests/generated/preview1_path_open_read_write.rs
@@ -0,0 +1,20 @@
+//! This file has been auto-generated, please do not modify manually
+//! To regenerate this file re-run `cargo xtask generate tests` from the project root
+
+use std::fs;
+// use tempdir::TempDir;
+// use xshell::{cmd, Shell};
+
+#[test]
+fn preview1_path_open_read_write() -> anyhow::Result<()> {
+    // let sh = Shell::new()?;
+    // let file_name = "preview1_path_open_read_write";
+    // let tempdir = TempDir::new("{file_name}")?;
+    // let wasi_file = test_utils::compile(&sh, &tempdir, &file_name)?;
+    let _ = fs::remove_dir_all("./tests/rundir/preview1_path_open_read_write");
+
+    // let cmd = cmd!(sh, "node ./src/jco.js run  --jco-dir ./tests/rundir/preview1_path_open_read_write --jco-import ./tests/virtualenvs/scratch.js {wasi_file} hello this '' 'is an argument' 'with 🚩 emoji'");
+
+    // let cmd = cmd.env("JCO_RUN_PATH", "deno").env("JCO_RUN_ARGS", "run --importmap importmap.json -A");cmd.run()?;
+    panic!("skipped"); // Ok(())
+}
diff --git a/tests/generated/preview1_path_rename.rs b/tests/generated/preview1_path_rename.rs
new file mode 100644
index 000000000..1513e5ab2
--- /dev/null
+++ b/tests/generated/preview1_path_rename.rs
@@ -0,0 +1,23 @@
+//! This file has been auto-generated, please do not modify manually
+//! To regenerate this file re-run `cargo xtask generate tests` from the project root
+
+use std::fs;
+use tempdir::TempDir;
+use xshell::{cmd, Shell};
+
+#[test]
+fn preview1_path_rename() -> anyhow::Result<()> {
+    let sh = Shell::new()?;
+    let file_name = "preview1_path_rename";
+    let tempdir = TempDir::new("{file_name}")?;
+    let wasi_file = test_utils::compile(&sh, &tempdir, &file_name)?;
+    let _ = fs::remove_dir_all("./tests/rundir/preview1_path_rename");
+
+    let cmd = cmd!(sh, "node ./src/jco.js run  --jco-dir ./tests/rundir/preview1_path_rename --jco-import ./tests/virtualenvs/scratch.js {wasi_file} hello this '' 'is an argument' 'with 🚩 emoji'");
+
+    let cmd = cmd
+        .env("JCO_RUN_PATH", "deno")
+        .env("JCO_RUN_ARGS", "run --importmap importmap.json -A");
+    cmd.run()?;
+    Ok(())
+}
diff --git a/tests/generated/preview1_path_rename_dir_trailing_slashes.rs b/tests/generated/preview1_path_rename_dir_trailing_slashes.rs
new file mode 100644
index 000000000..9ea851cc0
--- /dev/null
+++ b/tests/generated/preview1_path_rename_dir_trailing_slashes.rs
@@ -0,0 +1,23 @@
+//! This file has been auto-generated, please do not modify manually
+//! To regenerate this file re-run `cargo xtask generate tests` from the project root
+
+use std::fs;
+use tempdir::TempDir;
+use xshell::{cmd, Shell};
+
+#[test]
+fn preview1_path_rename_dir_trailing_slashes() -> anyhow::Result<()> {
+    let sh = Shell::new()?;
+    let file_name = "preview1_path_rename_dir_trailing_slashes";
+    let tempdir = TempDir::new("{file_name}")?;
+    let wasi_file = test_utils::compile(&sh, &tempdir, &file_name)?;
+    let _ = fs::remove_dir_all("./tests/rundir/preview1_path_rename_dir_trailing_slashes");
+
+    let cmd = cmd!(sh, "node ./src/jco.js run  --jco-dir ./tests/rundir/preview1_path_rename_dir_trailing_slashes --jco-import ./tests/virtualenvs/scratch.js {wasi_file} hello this '' 'is an argument' 'with 🚩 emoji'");
+
+    let cmd = cmd
+        .env("JCO_RUN_PATH", "deno")
+        .env("JCO_RUN_ARGS", "run --importmap importmap.json -A");
+    cmd.run()?;
+    Ok(())
+}
diff --git a/tests/generated/preview1_path_symlink_trailing_slashes.rs b/tests/generated/preview1_path_symlink_trailing_slashes.rs
new file mode 100644
index 000000000..5c3b44879
--- /dev/null
+++ b/tests/generated/preview1_path_symlink_trailing_slashes.rs
@@ -0,0 +1,23 @@
+//! This file has been auto-generated, please do not modify manually
+//! To regenerate this file re-run `cargo xtask generate tests` from the project root
+
+use std::fs;
+use tempdir::TempDir;
+use xshell::{cmd, Shell};
+
+#[test]
+fn preview1_path_symlink_trailing_slashes() -> anyhow::Result<()> {
+    let sh = Shell::new()?;
+    let file_name = "preview1_path_symlink_trailing_slashes";
+    let tempdir = TempDir::new("{file_name}")?;
+    let wasi_file = test_utils::compile(&sh, &tempdir, &file_name)?;
+    let _ = fs::remove_dir_all("./tests/rundir/preview1_path_symlink_trailing_slashes");
+
+    let cmd = cmd!(sh, "node ./src/jco.js run  --jco-dir ./tests/rundir/preview1_path_symlink_trailing_slashes --jco-import ./tests/virtualenvs/scratch.js {wasi_file} hello this '' 'is an argument' 'with 🚩 emoji'");
+
+    let cmd = cmd
+        .env("JCO_RUN_PATH", "deno")
+        .env("JCO_RUN_ARGS", "run --importmap importmap.json -A");
+    cmd.run()?;
+    Ok(())
+}
diff --git a/tests/generated/preview1_poll_oneoff_files.rs b/tests/generated/preview1_poll_oneoff_files.rs
new file mode 100644
index 000000000..247c0197d
--- /dev/null
+++ b/tests/generated/preview1_poll_oneoff_files.rs
@@ -0,0 +1,23 @@
+//! This file has been auto-generated, please do not modify manually
+//! To regenerate this file re-run `cargo xtask generate tests` from the project root
+
+use std::fs;
+use tempdir::TempDir;
+use xshell::{cmd, Shell};
+
+#[test]
+fn preview1_poll_oneoff_files() -> anyhow::Result<()> {
+    let sh = Shell::new()?;
+    let file_name = "preview1_poll_oneoff_files";
+    let tempdir = TempDir::new("{file_name}")?;
+    let wasi_file = test_utils::compile(&sh, &tempdir, &file_name)?;
+    let _ = fs::remove_dir_all("./tests/rundir/preview1_poll_oneoff_files");
+
+    let cmd = cmd!(sh, "node ./src/jco.js run  --jco-dir ./tests/rundir/preview1_poll_oneoff_files --jco-import ./tests/virtualenvs/scratch.js {wasi_file} hello this '' 'is an argument' 'with 🚩 emoji'");
+
+    let cmd = cmd
+        .env("JCO_RUN_PATH", "deno")
+        .env("JCO_RUN_ARGS", "run --importmap importmap.json -A");
+    cmd.run()?;
+    Ok(())
+}
diff --git a/tests/generated/preview1_poll_oneoff_stdio.rs b/tests/generated/preview1_poll_oneoff_stdio.rs
new file mode 100644
index 000000000..489990aed
--- /dev/null
+++ b/tests/generated/preview1_poll_oneoff_stdio.rs
@@ -0,0 +1,23 @@
+//! This file has been auto-generated, please do not modify manually
+//! To regenerate this file re-run `cargo xtask generate tests` from the project root
+
+use std::fs;
+use tempdir::TempDir;
+use xshell::{cmd, Shell};
+
+#[test]
+fn preview1_poll_oneoff_stdio() -> anyhow::Result<()> {
+    let sh = Shell::new()?;
+    let file_name = "preview1_poll_oneoff_stdio";
+    let tempdir = TempDir::new("{file_name}")?;
+    let wasi_file = test_utils::compile(&sh, &tempdir, &file_name)?;
+    let _ = fs::remove_dir_all("./tests/rundir/preview1_poll_oneoff_stdio");
+
+    let cmd = cmd!(sh, "node ./src/jco.js run  --jco-dir ./tests/rundir/preview1_poll_oneoff_stdio --jco-import ./tests/virtualenvs/scratch.js {wasi_file} hello this '' 'is an argument' 'with 🚩 emoji'");
+
+    let cmd = cmd
+        .env("JCO_RUN_PATH", "deno")
+        .env("JCO_RUN_ARGS", "run --importmap importmap.json -A");
+    cmd.run()?;
+    Ok(())
+}
diff --git a/tests/generated/preview1_readlink.rs b/tests/generated/preview1_readlink.rs
new file mode 100644
index 000000000..cf9856271
--- /dev/null
+++ b/tests/generated/preview1_readlink.rs
@@ -0,0 +1,23 @@
+//! This file has been auto-generated, please do not modify manually
+//! To regenerate this file re-run `cargo xtask generate tests` from the project root
+
+use std::fs;
+use tempdir::TempDir;
+use xshell::{cmd, Shell};
+
+#[test]
+fn preview1_readlink() -> anyhow::Result<()> {
+    let sh = Shell::new()?;
+    let file_name = "preview1_readlink";
+    let tempdir = TempDir::new("{file_name}")?;
+    let wasi_file = test_utils::compile(&sh, &tempdir, &file_name)?;
+    let _ = fs::remove_dir_all("./tests/rundir/preview1_readlink");
+
+    let cmd = cmd!(sh, "node ./src/jco.js run  --jco-dir ./tests/rundir/preview1_readlink --jco-import ./tests/virtualenvs/scratch.js {wasi_file} hello this '' 'is an argument' 'with 🚩 emoji'");
+
+    let cmd = cmd
+        .env("JCO_RUN_PATH", "deno")
+        .env("JCO_RUN_ARGS", "run --importmap importmap.json -A");
+    cmd.run()?;
+    Ok(())
+}
diff --git a/tests/generated/preview1_regular_file_isatty.rs b/tests/generated/preview1_regular_file_isatty.rs
new file mode 100644
index 000000000..4e3b2f276
--- /dev/null
+++ b/tests/generated/preview1_regular_file_isatty.rs
@@ -0,0 +1,23 @@
+//! This file has been auto-generated, please do not modify manually
+//! To regenerate this file re-run `cargo xtask generate tests` from the project root
+
+use std::fs;
+use tempdir::TempDir;
+use xshell::{cmd, Shell};
+
+#[test]
+fn preview1_regular_file_isatty() -> anyhow::Result<()> {
+    let sh = Shell::new()?;
+    let file_name = "preview1_regular_file_isatty";
+    let tempdir = TempDir::new("{file_name}")?;
+    let wasi_file = test_utils::compile(&sh, &tempdir, &file_name)?;
+    let _ = fs::remove_dir_all("./tests/rundir/preview1_regular_file_isatty");
+
+    let cmd = cmd!(sh, "node ./src/jco.js run  --jco-dir ./tests/rundir/preview1_regular_file_isatty --jco-import ./tests/virtualenvs/scratch.js {wasi_file} hello this '' 'is an argument' 'with 🚩 emoji'");
+
+    let cmd = cmd
+        .env("JCO_RUN_PATH", "deno")
+        .env("JCO_RUN_ARGS", "run --importmap importmap.json -A");
+    cmd.run()?;
+    Ok(())
+}
diff --git a/tests/generated/preview1_remove_directory.rs b/tests/generated/preview1_remove_directory.rs
new file mode 100644
index 000000000..9d7e73abf
--- /dev/null
+++ b/tests/generated/preview1_remove_directory.rs
@@ -0,0 +1,23 @@
+//! This file has been auto-generated, please do not modify manually
+//! To regenerate this file re-run `cargo xtask generate tests` from the project root
+
+use std::fs;
+use tempdir::TempDir;
+use xshell::{cmd, Shell};
+
+#[test]
+fn preview1_remove_directory() -> anyhow::Result<()> {
+    let sh = Shell::new()?;
+    let file_name = "preview1_remove_directory";
+    let tempdir = TempDir::new("{file_name}")?;
+    let wasi_file = test_utils::compile(&sh, &tempdir, &file_name)?;
+    let _ = fs::remove_dir_all("./tests/rundir/preview1_remove_directory");
+
+    let cmd = cmd!(sh, "node ./src/jco.js run  --jco-dir ./tests/rundir/preview1_remove_directory --jco-import ./tests/virtualenvs/scratch.js {wasi_file} hello this '' 'is an argument' 'with 🚩 emoji'");
+
+    let cmd = cmd
+        .env("JCO_RUN_PATH", "deno")
+        .env("JCO_RUN_ARGS", "run --importmap importmap.json -A");
+    cmd.run()?;
+    Ok(())
+}
diff --git a/tests/generated/preview1_remove_nonempty_directory.rs b/tests/generated/preview1_remove_nonempty_directory.rs
new file mode 100644
index 000000000..2076f03c6
--- /dev/null
+++ b/tests/generated/preview1_remove_nonempty_directory.rs
@@ -0,0 +1,23 @@
+//! This file has been auto-generated, please do not modify manually
+//! To regenerate this file re-run `cargo xtask generate tests` from the project root
+
+use std::fs;
+use tempdir::TempDir;
+use xshell::{cmd, Shell};
+
+#[test]
+fn preview1_remove_nonempty_directory() -> anyhow::Result<()> {
+    let sh = Shell::new()?;
+    let file_name = "preview1_remove_nonempty_directory";
+    let tempdir = TempDir::new("{file_name}")?;
+    let wasi_file = test_utils::compile(&sh, &tempdir, &file_name)?;
+    let _ = fs::remove_dir_all("./tests/rundir/preview1_remove_nonempty_directory");
+
+    let cmd = cmd!(sh, "node ./src/jco.js run  --jco-dir ./tests/rundir/preview1_remove_nonempty_directory --jco-import ./tests/virtualenvs/scratch.js {wasi_file} hello this '' 'is an argument' 'with 🚩 emoji'");
+
+    let cmd = cmd
+        .env("JCO_RUN_PATH", "deno")
+        .env("JCO_RUN_ARGS", "run --importmap importmap.json -A");
+    cmd.run()?;
+    Ok(())
+}
diff --git a/tests/generated/preview1_renumber.rs b/tests/generated/preview1_renumber.rs
new file mode 100644
index 000000000..93ed6ebc3
--- /dev/null
+++ b/tests/generated/preview1_renumber.rs
@@ -0,0 +1,23 @@
+//! This file has been auto-generated, please do not modify manually
+//! To regenerate this file re-run `cargo xtask generate tests` from the project root
+
+use std::fs;
+use tempdir::TempDir;
+use xshell::{cmd, Shell};
+
+#[test]
+fn preview1_renumber() -> anyhow::Result<()> {
+    let sh = Shell::new()?;
+    let file_name = "preview1_renumber";
+    let tempdir = TempDir::new("{file_name}")?;
+    let wasi_file = test_utils::compile(&sh, &tempdir, &file_name)?;
+    let _ = fs::remove_dir_all("./tests/rundir/preview1_renumber");
+
+    let cmd = cmd!(sh, "node ./src/jco.js run  --jco-dir ./tests/rundir/preview1_renumber --jco-import ./tests/virtualenvs/scratch.js {wasi_file} hello this '' 'is an argument' 'with 🚩 emoji'");
+
+    let cmd = cmd
+        .env("JCO_RUN_PATH", "deno")
+        .env("JCO_RUN_ARGS", "run --importmap importmap.json -A");
+    cmd.run()?;
+    Ok(())
+}
diff --git a/tests/generated/preview1_sched_yield.rs b/tests/generated/preview1_sched_yield.rs
new file mode 100644
index 000000000..4db2f74f2
--- /dev/null
+++ b/tests/generated/preview1_sched_yield.rs
@@ -0,0 +1,23 @@
+//! This file has been auto-generated, please do not modify manually
+//! To regenerate this file re-run `cargo xtask generate tests` from the project root
+
+use std::fs;
+use tempdir::TempDir;
+use xshell::{cmd, Shell};
+
+#[test]
+fn preview1_sched_yield() -> anyhow::Result<()> {
+    let sh = Shell::new()?;
+    let file_name = "preview1_sched_yield";
+    let tempdir = TempDir::new("{file_name}")?;
+    let wasi_file = test_utils::compile(&sh, &tempdir, &file_name)?;
+    let _ = fs::remove_dir_all("./tests/rundir/preview1_sched_yield");
+
+    let cmd = cmd!(sh, "node ./src/jco.js run  --jco-dir ./tests/rundir/preview1_sched_yield --jco-import ./tests/virtualenvs/scratch.js {wasi_file} hello this '' 'is an argument' 'with 🚩 emoji'");
+
+    let cmd = cmd
+        .env("JCO_RUN_PATH", "deno")
+        .env("JCO_RUN_ARGS", "run --importmap importmap.json -A");
+    cmd.run()?;
+    Ok(())
+}
diff --git a/tests/generated/preview1_stdio.rs b/tests/generated/preview1_stdio.rs
new file mode 100644
index 000000000..937cff175
--- /dev/null
+++ b/tests/generated/preview1_stdio.rs
@@ -0,0 +1,23 @@
+//! This file has been auto-generated, please do not modify manually
+//! To regenerate this file re-run `cargo xtask generate tests` from the project root
+
+use std::fs;
+use tempdir::TempDir;
+use xshell::{cmd, Shell};
+
+#[test]
+fn preview1_stdio() -> anyhow::Result<()> {
+    let sh = Shell::new()?;
+    let file_name = "preview1_stdio";
+    let tempdir = TempDir::new("{file_name}")?;
+    let wasi_file = test_utils::compile(&sh, &tempdir, &file_name)?;
+    let _ = fs::remove_dir_all("./tests/rundir/preview1_stdio");
+
+    let cmd = cmd!(sh, "node ./src/jco.js run  --jco-dir ./tests/rundir/preview1_stdio --jco-import ./tests/virtualenvs/scratch.js {wasi_file} hello this '' 'is an argument' 'with 🚩 emoji'");
+
+    let cmd = cmd
+        .env("JCO_RUN_PATH", "deno")
+        .env("JCO_RUN_ARGS", "run --importmap importmap.json -A");
+    cmd.run()?;
+    Ok(())
+}
diff --git a/tests/generated/preview1_stdio_isatty.rs b/tests/generated/preview1_stdio_isatty.rs
new file mode 100644
index 000000000..4502e3bac
--- /dev/null
+++ b/tests/generated/preview1_stdio_isatty.rs
@@ -0,0 +1,23 @@
+//! This file has been auto-generated, please do not modify manually
+//! To regenerate this file re-run `cargo xtask generate tests` from the project root
+
+use std::fs;
+use tempdir::TempDir;
+use xshell::{cmd, Shell};
+
+#[test]
+fn preview1_stdio_isatty() -> anyhow::Result<()> {
+    let sh = Shell::new()?;
+    let file_name = "preview1_stdio_isatty";
+    let tempdir = TempDir::new("{file_name}")?;
+    let wasi_file = test_utils::compile(&sh, &tempdir, &file_name)?;
+    let _ = fs::remove_dir_all("./tests/rundir/preview1_stdio_isatty");
+
+    let cmd = cmd!(sh, "node ./src/jco.js run  --jco-dir ./tests/rundir/preview1_stdio_isatty --jco-import ./tests/virtualenvs/scratch.js {wasi_file} hello this '' 'is an argument' 'with 🚩 emoji'");
+
+    let cmd = cmd
+        .env("JCO_RUN_PATH", "deno")
+        .env("JCO_RUN_ARGS", "run --importmap importmap.json -A");
+    cmd.run()?;
+    Ok(())
+}
diff --git a/tests/generated/preview1_stdio_not_isatty.rs b/tests/generated/preview1_stdio_not_isatty.rs
new file mode 100644
index 000000000..3c85bcd92
--- /dev/null
+++ b/tests/generated/preview1_stdio_not_isatty.rs
@@ -0,0 +1,23 @@
+//! This file has been auto-generated, please do not modify manually
+//! To regenerate this file re-run `cargo xtask generate tests` from the project root
+
+use std::fs;
+use tempdir::TempDir;
+use xshell::{cmd, Shell};
+
+#[test]
+fn preview1_stdio_not_isatty() -> anyhow::Result<()> {
+    let sh = Shell::new()?;
+    let file_name = "preview1_stdio_not_isatty";
+    let tempdir = TempDir::new("{file_name}")?;
+    let wasi_file = test_utils::compile(&sh, &tempdir, &file_name)?;
+    let _ = fs::remove_dir_all("./tests/rundir/preview1_stdio_not_isatty");
+
+    let cmd = cmd!(sh, "node ./src/jco.js run  --jco-dir ./tests/rundir/preview1_stdio_not_isatty --jco-import ./tests/virtualenvs/notty.js {wasi_file} hello this '' 'is an argument' 'with 🚩 emoji'");
+
+    let cmd = cmd
+        .env("JCO_RUN_PATH", "deno")
+        .env("JCO_RUN_ARGS", "run --importmap importmap.json -A");
+    cmd.run()?;
+    Ok(())
+}
diff --git a/tests/generated/preview1_symlink_create.rs b/tests/generated/preview1_symlink_create.rs
new file mode 100644
index 000000000..937bfab82
--- /dev/null
+++ b/tests/generated/preview1_symlink_create.rs
@@ -0,0 +1,23 @@
+//! This file has been auto-generated, please do not modify manually
+//! To regenerate this file re-run `cargo xtask generate tests` from the project root
+
+use std::fs;
+use tempdir::TempDir;
+use xshell::{cmd, Shell};
+
+#[test]
+fn preview1_symlink_create() -> anyhow::Result<()> {
+    let sh = Shell::new()?;
+    let file_name = "preview1_symlink_create";
+    let tempdir = TempDir::new("{file_name}")?;
+    let wasi_file = test_utils::compile(&sh, &tempdir, &file_name)?;
+    let _ = fs::remove_dir_all("./tests/rundir/preview1_symlink_create");
+
+    let cmd = cmd!(sh, "node ./src/jco.js run  --jco-dir ./tests/rundir/preview1_symlink_create --jco-import ./tests/virtualenvs/scratch.js {wasi_file} hello this '' 'is an argument' 'with 🚩 emoji'");
+
+    let cmd = cmd
+        .env("JCO_RUN_PATH", "deno")
+        .env("JCO_RUN_ARGS", "run --importmap importmap.json -A");
+    cmd.run()?;
+    Ok(())
+}
diff --git a/tests/generated/preview1_symlink_filestat.rs b/tests/generated/preview1_symlink_filestat.rs
new file mode 100644
index 000000000..d7cc811bc
--- /dev/null
+++ b/tests/generated/preview1_symlink_filestat.rs
@@ -0,0 +1,23 @@
+//! This file has been auto-generated, please do not modify manually
+//! To regenerate this file re-run `cargo xtask generate tests` from the project root
+
+use std::fs;
+use tempdir::TempDir;
+use xshell::{cmd, Shell};
+
+#[test]
+fn preview1_symlink_filestat() -> anyhow::Result<()> {
+    let sh = Shell::new()?;
+    let file_name = "preview1_symlink_filestat";
+    let tempdir = TempDir::new("{file_name}")?;
+    let wasi_file = test_utils::compile(&sh, &tempdir, &file_name)?;
+    let _ = fs::remove_dir_all("./tests/rundir/preview1_symlink_filestat");
+
+    let cmd = cmd!(sh, "node ./src/jco.js run  --jco-dir ./tests/rundir/preview1_symlink_filestat --jco-import ./tests/virtualenvs/scratch.js {wasi_file} hello this '' 'is an argument' 'with 🚩 emoji'");
+
+    let cmd = cmd
+        .env("JCO_RUN_PATH", "deno")
+        .env("JCO_RUN_ARGS", "run --importmap importmap.json -A");
+    cmd.run()?;
+    Ok(())
+}
diff --git a/tests/generated/preview1_symlink_loop.rs b/tests/generated/preview1_symlink_loop.rs
new file mode 100644
index 000000000..c44c9c8dc
--- /dev/null
+++ b/tests/generated/preview1_symlink_loop.rs
@@ -0,0 +1,23 @@
+//! This file has been auto-generated, please do not modify manually
+//! To regenerate this file re-run `cargo xtask generate tests` from the project root
+
+use std::fs;
+use tempdir::TempDir;
+use xshell::{cmd, Shell};
+
+#[test]
+fn preview1_symlink_loop() -> anyhow::Result<()> {
+    let sh = Shell::new()?;
+    let file_name = "preview1_symlink_loop";
+    let tempdir = TempDir::new("{file_name}")?;
+    let wasi_file = test_utils::compile(&sh, &tempdir, &file_name)?;
+    let _ = fs::remove_dir_all("./tests/rundir/preview1_symlink_loop");
+
+    let cmd = cmd!(sh, "node ./src/jco.js run  --jco-dir ./tests/rundir/preview1_symlink_loop --jco-import ./tests/virtualenvs/scratch.js {wasi_file} hello this '' 'is an argument' 'with 🚩 emoji'");
+
+    let cmd = cmd
+        .env("JCO_RUN_PATH", "deno")
+        .env("JCO_RUN_ARGS", "run --importmap importmap.json -A");
+    cmd.run()?;
+    Ok(())
+}
diff --git a/tests/generated/preview1_unicode_output.rs b/tests/generated/preview1_unicode_output.rs
new file mode 100644
index 000000000..e3b2c7885
--- /dev/null
+++ b/tests/generated/preview1_unicode_output.rs
@@ -0,0 +1,23 @@
+//! This file has been auto-generated, please do not modify manually
+//! To regenerate this file re-run `cargo xtask generate tests` from the project root
+
+use std::fs;
+use tempdir::TempDir;
+use xshell::{cmd, Shell};
+
+#[test]
+fn preview1_unicode_output() -> anyhow::Result<()> {
+    let sh = Shell::new()?;
+    let file_name = "preview1_unicode_output";
+    let tempdir = TempDir::new("{file_name}")?;
+    let wasi_file = test_utils::compile(&sh, &tempdir, &file_name)?;
+    let _ = fs::remove_dir_all("./tests/rundir/preview1_unicode_output");
+
+    let cmd = cmd!(sh, "node ./src/jco.js run  --jco-dir ./tests/rundir/preview1_unicode_output --jco-import ./tests/virtualenvs/scratch.js {wasi_file} hello this '' 'is an argument' 'with 🚩 emoji'");
+
+    let cmd = cmd
+        .env("JCO_RUN_PATH", "deno")
+        .env("JCO_RUN_ARGS", "run --importmap importmap.json -A");
+    cmd.run()?;
+    Ok(())
+}
diff --git a/tests/generated/preview1_unlink_file_trailing_slashes.rs b/tests/generated/preview1_unlink_file_trailing_slashes.rs
new file mode 100644
index 000000000..ef29409b2
--- /dev/null
+++ b/tests/generated/preview1_unlink_file_trailing_slashes.rs
@@ -0,0 +1,23 @@
+//! This file has been auto-generated, please do not modify manually
+//! To regenerate this file re-run `cargo xtask generate tests` from the project root
+
+use std::fs;
+use tempdir::TempDir;
+use xshell::{cmd, Shell};
+
+#[test]
+fn preview1_unlink_file_trailing_slashes() -> anyhow::Result<()> {
+    let sh = Shell::new()?;
+    let file_name = "preview1_unlink_file_trailing_slashes";
+    let tempdir = TempDir::new("{file_name}")?;
+    let wasi_file = test_utils::compile(&sh, &tempdir, &file_name)?;
+    let _ = fs::remove_dir_all("./tests/rundir/preview1_unlink_file_trailing_slashes");
+
+    let cmd = cmd!(sh, "node ./src/jco.js run  --jco-dir ./tests/rundir/preview1_unlink_file_trailing_slashes --jco-import ./tests/virtualenvs/scratch.js {wasi_file} hello this '' 'is an argument' 'with 🚩 emoji'");
+
+    let cmd = cmd
+        .env("JCO_RUN_PATH", "deno")
+        .env("JCO_RUN_ARGS", "run --importmap importmap.json -A");
+    cmd.run()?;
+    Ok(())
+}
diff --git a/tests/generated/preview2_ip_name_lookup.rs b/tests/generated/preview2_ip_name_lookup.rs
new file mode 100644
index 000000000..52c108071
--- /dev/null
+++ b/tests/generated/preview2_ip_name_lookup.rs
@@ -0,0 +1,23 @@
+//! This file has been auto-generated, please do not modify manually
+//! To regenerate this file re-run `cargo xtask generate tests` from the project root
+
+use std::fs;
+use tempdir::TempDir;
+use xshell::{cmd, Shell};
+
+#[test]
+fn preview2_ip_name_lookup() -> anyhow::Result<()> {
+    let sh = Shell::new()?;
+    let file_name = "preview2_ip_name_lookup";
+    let tempdir = TempDir::new("{file_name}")?;
+    let wasi_file = test_utils::compile(&sh, &tempdir, &file_name)?;
+    let _ = fs::remove_dir_all("./tests/rundir/preview2_ip_name_lookup");
+
+    let cmd = cmd!(sh, "node ./src/jco.js run  --jco-dir ./tests/rundir/preview2_ip_name_lookup --jco-import ./tests/virtualenvs/base.js {wasi_file} hello this '' 'is an argument' 'with 🚩 emoji'");
+
+    let cmd = cmd
+        .env("JCO_RUN_PATH", "deno")
+        .env("JCO_RUN_ARGS", "run --importmap importmap.json -A");
+    cmd.run()?;
+    Ok(())
+}
diff --git a/tests/generated/preview2_random.rs b/tests/generated/preview2_random.rs
new file mode 100644
index 000000000..82dad2192
--- /dev/null
+++ b/tests/generated/preview2_random.rs
@@ -0,0 +1,23 @@
+//! This file has been auto-generated, please do not modify manually
+//! To regenerate this file re-run `cargo xtask generate tests` from the project root
+
+use std::fs;
+use tempdir::TempDir;
+use xshell::{cmd, Shell};
+
+#[test]
+fn preview2_random() -> anyhow::Result<()> {
+    let sh = Shell::new()?;
+    let file_name = "preview2_random";
+    let tempdir = TempDir::new("{file_name}")?;
+    let wasi_file = test_utils::compile(&sh, &tempdir, &file_name)?;
+    let _ = fs::remove_dir_all("./tests/rundir/preview2_random");
+
+    let cmd = cmd!(sh, "node ./src/jco.js run  --jco-dir ./tests/rundir/preview2_random --jco-import ./tests/virtualenvs/base.js {wasi_file} hello this '' 'is an argument' 'with 🚩 emoji'");
+
+    let cmd = cmd
+        .env("JCO_RUN_PATH", "deno")
+        .env("JCO_RUN_ARGS", "run --importmap importmap.json -A");
+    cmd.run()?;
+    Ok(())
+}
diff --git a/tests/generated/preview2_sleep.rs b/tests/generated/preview2_sleep.rs
new file mode 100644
index 000000000..4bc10a036
--- /dev/null
+++ b/tests/generated/preview2_sleep.rs
@@ -0,0 +1,23 @@
+//! This file has been auto-generated, please do not modify manually
+//! To regenerate this file re-run `cargo xtask generate tests` from the project root
+
+use std::fs;
+use tempdir::TempDir;
+use xshell::{cmd, Shell};
+
+#[test]
+fn preview2_sleep() -> anyhow::Result<()> {
+    let sh = Shell::new()?;
+    let file_name = "preview2_sleep";
+    let tempdir = TempDir::new("{file_name}")?;
+    let wasi_file = test_utils::compile(&sh, &tempdir, &file_name)?;
+    let _ = fs::remove_dir_all("./tests/rundir/preview2_sleep");
+
+    let cmd = cmd!(sh, "node ./src/jco.js run  --jco-dir ./tests/rundir/preview2_sleep --jco-import ./tests/virtualenvs/base.js {wasi_file} hello this '' 'is an argument' 'with 🚩 emoji'");
+
+    let cmd = cmd
+        .env("JCO_RUN_PATH", "deno")
+        .env("JCO_RUN_ARGS", "run --importmap importmap.json -A");
+    cmd.run()?;
+    Ok(())
+}
diff --git a/tests/generated/preview2_stream_pollable_correct.rs b/tests/generated/preview2_stream_pollable_correct.rs
new file mode 100644
index 000000000..ba13434b7
--- /dev/null
+++ b/tests/generated/preview2_stream_pollable_correct.rs
@@ -0,0 +1,23 @@
+//! This file has been auto-generated, please do not modify manually
+//! To regenerate this file re-run `cargo xtask generate tests` from the project root
+
+use std::fs;
+use tempdir::TempDir;
+use xshell::{cmd, Shell};
+
+#[test]
+fn preview2_stream_pollable_correct() -> anyhow::Result<()> {
+    let sh = Shell::new()?;
+    let file_name = "preview2_stream_pollable_correct";
+    let tempdir = TempDir::new("{file_name}")?;
+    let wasi_file = test_utils::compile(&sh, &tempdir, &file_name)?;
+    let _ = fs::remove_dir_all("./tests/rundir/preview2_stream_pollable_correct");
+
+    let cmd = cmd!(sh, "node ./src/jco.js run  --jco-dir ./tests/rundir/preview2_stream_pollable_correct --jco-import ./tests/virtualenvs/base.js {wasi_file} hello this '' 'is an argument' 'with 🚩 emoji'");
+
+    let cmd = cmd
+        .env("JCO_RUN_PATH", "deno")
+        .env("JCO_RUN_ARGS", "run --importmap importmap.json -A");
+    cmd.run()?;
+    Ok(())
+}
diff --git a/tests/generated/preview2_stream_pollable_traps.rs b/tests/generated/preview2_stream_pollable_traps.rs
new file mode 100644
index 000000000..dc45a34cd
--- /dev/null
+++ b/tests/generated/preview2_stream_pollable_traps.rs
@@ -0,0 +1,23 @@
+//! This file has been auto-generated, please do not modify manually
+//! To regenerate this file re-run `cargo xtask generate tests` from the project root
+
+use std::fs;
+use tempdir::TempDir;
+use xshell::{cmd, Shell};
+
+#[test]
+fn preview2_stream_pollable_traps() -> anyhow::Result<()> {
+    let sh = Shell::new()?;
+    let file_name = "preview2_stream_pollable_traps";
+    let tempdir = TempDir::new("{file_name}")?;
+    let wasi_file = test_utils::compile(&sh, &tempdir, &file_name)?;
+    let _ = fs::remove_dir_all("./tests/rundir/preview2_stream_pollable_traps");
+
+    let cmd = cmd!(sh, "node ./src/jco.js run  --jco-dir ./tests/rundir/preview2_stream_pollable_traps --jco-import ./tests/virtualenvs/base.js {wasi_file} hello this '' 'is an argument' 'with 🚩 emoji'");
+
+    let cmd = cmd
+        .env("JCO_RUN_PATH", "deno")
+        .env("JCO_RUN_ARGS", "run --importmap importmap.json -A");
+    cmd.run().expect_err("test should exit with code 1");
+    Ok(())
+}
diff --git a/tests/generated/preview2_tcp_bind.rs b/tests/generated/preview2_tcp_bind.rs
new file mode 100644
index 000000000..228b83e73
--- /dev/null
+++ b/tests/generated/preview2_tcp_bind.rs
@@ -0,0 +1,23 @@
+//! This file has been auto-generated, please do not modify manually
+//! To regenerate this file re-run `cargo xtask generate tests` from the project root
+
+use std::fs;
+use tempdir::TempDir;
+use xshell::{cmd, Shell};
+
+#[test]
+fn preview2_tcp_bind() -> anyhow::Result<()> {
+    let sh = Shell::new()?;
+    let file_name = "preview2_tcp_bind";
+    let tempdir = TempDir::new("{file_name}")?;
+    let wasi_file = test_utils::compile(&sh, &tempdir, &file_name)?;
+    let _ = fs::remove_dir_all("./tests/rundir/preview2_tcp_bind");
+
+    let cmd = cmd!(sh, "node ./src/jco.js run  --jco-dir ./tests/rundir/preview2_tcp_bind --jco-import ./tests/virtualenvs/base.js {wasi_file} hello this '' 'is an argument' 'with 🚩 emoji'");
+
+    let cmd = cmd
+        .env("JCO_RUN_PATH", "deno")
+        .env("JCO_RUN_ARGS", "run --importmap importmap.json -A");
+    cmd.run()?;
+    Ok(())
+}
diff --git a/tests/generated/preview2_tcp_connect.rs b/tests/generated/preview2_tcp_connect.rs
new file mode 100644
index 000000000..19c4a3ac6
--- /dev/null
+++ b/tests/generated/preview2_tcp_connect.rs
@@ -0,0 +1,23 @@
+//! This file has been auto-generated, please do not modify manually
+//! To regenerate this file re-run `cargo xtask generate tests` from the project root
+
+use std::fs;
+use tempdir::TempDir;
+use xshell::{cmd, Shell};
+
+#[test]
+fn preview2_tcp_connect() -> anyhow::Result<()> {
+    let sh = Shell::new()?;
+    let file_name = "preview2_tcp_connect";
+    let tempdir = TempDir::new("{file_name}")?;
+    let wasi_file = test_utils::compile(&sh, &tempdir, &file_name)?;
+    let _ = fs::remove_dir_all("./tests/rundir/preview2_tcp_connect");
+
+    let cmd = cmd!(sh, "node ./src/jco.js run  --jco-dir ./tests/rundir/preview2_tcp_connect --jco-import ./tests/virtualenvs/base.js {wasi_file} hello this '' 'is an argument' 'with 🚩 emoji'");
+
+    let cmd = cmd
+        .env("JCO_RUN_PATH", "deno")
+        .env("JCO_RUN_ARGS", "run --importmap importmap.json -A");
+    cmd.run()?;
+    Ok(())
+}
diff --git a/tests/generated/preview2_tcp_sample_application.rs b/tests/generated/preview2_tcp_sample_application.rs
new file mode 100644
index 000000000..4600aa3fe
--- /dev/null
+++ b/tests/generated/preview2_tcp_sample_application.rs
@@ -0,0 +1,23 @@
+//! This file has been auto-generated, please do not modify manually
+//! To regenerate this file re-run `cargo xtask generate tests` from the project root
+
+use std::fs;
+use tempdir::TempDir;
+use xshell::{cmd, Shell};
+
+#[test]
+fn preview2_tcp_sample_application() -> anyhow::Result<()> {
+    let sh = Shell::new()?;
+    let file_name = "preview2_tcp_sample_application";
+    let tempdir = TempDir::new("{file_name}")?;
+    let wasi_file = test_utils::compile(&sh, &tempdir, &file_name)?;
+    let _ = fs::remove_dir_all("./tests/rundir/preview2_tcp_sample_application");
+
+    let cmd = cmd!(sh, "node ./src/jco.js run  --jco-dir ./tests/rundir/preview2_tcp_sample_application --jco-import ./tests/virtualenvs/base.js {wasi_file} hello this '' 'is an argument' 'with 🚩 emoji'");
+
+    let cmd = cmd
+        .env("JCO_RUN_PATH", "deno")
+        .env("JCO_RUN_ARGS", "run --importmap importmap.json -A");
+    cmd.run()?;
+    Ok(())
+}
diff --git a/tests/generated/preview2_tcp_sockopts.rs b/tests/generated/preview2_tcp_sockopts.rs
new file mode 100644
index 000000000..db6b71c3e
--- /dev/null
+++ b/tests/generated/preview2_tcp_sockopts.rs
@@ -0,0 +1,23 @@
+//! This file has been auto-generated, please do not modify manually
+//! To regenerate this file re-run `cargo xtask generate tests` from the project root
+
+use std::fs;
+use tempdir::TempDir;
+use xshell::{cmd, Shell};
+
+#[test]
+fn preview2_tcp_sockopts() -> anyhow::Result<()> {
+    let sh = Shell::new()?;
+    let file_name = "preview2_tcp_sockopts";
+    let tempdir = TempDir::new("{file_name}")?;
+    let wasi_file = test_utils::compile(&sh, &tempdir, &file_name)?;
+    let _ = fs::remove_dir_all("./tests/rundir/preview2_tcp_sockopts");
+
+    let cmd = cmd!(sh, "node ./src/jco.js run  --jco-dir ./tests/rundir/preview2_tcp_sockopts --jco-import ./tests/virtualenvs/base.js {wasi_file} hello this '' 'is an argument' 'with 🚩 emoji'");
+
+    let cmd = cmd
+        .env("JCO_RUN_PATH", "deno")
+        .env("JCO_RUN_ARGS", "run --importmap importmap.json -A");
+    cmd.run()?;
+    Ok(())
+}
diff --git a/tests/generated/preview2_tcp_states.rs b/tests/generated/preview2_tcp_states.rs
new file mode 100644
index 000000000..9cf42a39f
--- /dev/null
+++ b/tests/generated/preview2_tcp_states.rs
@@ -0,0 +1,23 @@
+//! This file has been auto-generated, please do not modify manually
+//! To regenerate this file re-run `cargo xtask generate tests` from the project root
+
+use std::fs;
+use tempdir::TempDir;
+use xshell::{cmd, Shell};
+
+#[test]
+fn preview2_tcp_states() -> anyhow::Result<()> {
+    let sh = Shell::new()?;
+    let file_name = "preview2_tcp_states";
+    let tempdir = TempDir::new("{file_name}")?;
+    let wasi_file = test_utils::compile(&sh, &tempdir, &file_name)?;
+    let _ = fs::remove_dir_all("./tests/rundir/preview2_tcp_states");
+
+    let cmd = cmd!(sh, "node ./src/jco.js run  --jco-dir ./tests/rundir/preview2_tcp_states --jco-import ./tests/virtualenvs/base.js {wasi_file} hello this '' 'is an argument' 'with 🚩 emoji'");
+
+    let cmd = cmd
+        .env("JCO_RUN_PATH", "deno")
+        .env("JCO_RUN_ARGS", "run --importmap importmap.json -A");
+    cmd.run()?;
+    Ok(())
+}
diff --git a/tests/generated/preview2_udp_bind.rs b/tests/generated/preview2_udp_bind.rs
new file mode 100644
index 000000000..cefd152d1
--- /dev/null
+++ b/tests/generated/preview2_udp_bind.rs
@@ -0,0 +1,23 @@
+//! This file has been auto-generated, please do not modify manually
+//! To regenerate this file re-run `cargo xtask generate tests` from the project root
+
+use std::fs;
+use tempdir::TempDir;
+use xshell::{cmd, Shell};
+
+#[test]
+fn preview2_udp_bind() -> anyhow::Result<()> {
+    let sh = Shell::new()?;
+    let file_name = "preview2_udp_bind";
+    let tempdir = TempDir::new("{file_name}")?;
+    let wasi_file = test_utils::compile(&sh, &tempdir, &file_name)?;
+    let _ = fs::remove_dir_all("./tests/rundir/preview2_udp_bind");
+
+    let cmd = cmd!(sh, "node ./src/jco.js run  --jco-dir ./tests/rundir/preview2_udp_bind --jco-import ./tests/virtualenvs/base.js {wasi_file} hello this '' 'is an argument' 'with 🚩 emoji'");
+
+    let cmd = cmd
+        .env("JCO_RUN_PATH", "deno")
+        .env("JCO_RUN_ARGS", "run --importmap importmap.json -A");
+    cmd.run()?;
+    Ok(())
+}
diff --git a/tests/generated/preview2_udp_connect.rs b/tests/generated/preview2_udp_connect.rs
new file mode 100644
index 000000000..a522d322f
--- /dev/null
+++ b/tests/generated/preview2_udp_connect.rs
@@ -0,0 +1,23 @@
+//! This file has been auto-generated, please do not modify manually
+//! To regenerate this file re-run `cargo xtask generate tests` from the project root
+
+use std::fs;
+use tempdir::TempDir;
+use xshell::{cmd, Shell};
+
+#[test]
+fn preview2_udp_connect() -> anyhow::Result<()> {
+    let sh = Shell::new()?;
+    let file_name = "preview2_udp_connect";
+    let tempdir = TempDir::new("{file_name}")?;
+    let wasi_file = test_utils::compile(&sh, &tempdir, &file_name)?;
+    let _ = fs::remove_dir_all("./tests/rundir/preview2_udp_connect");
+
+    let cmd = cmd!(sh, "node ./src/jco.js run  --jco-dir ./tests/rundir/preview2_udp_connect --jco-import ./tests/virtualenvs/base.js {wasi_file} hello this '' 'is an argument' 'with 🚩 emoji'");
+
+    let cmd = cmd
+        .env("JCO_RUN_PATH", "deno")
+        .env("JCO_RUN_ARGS", "run --importmap importmap.json -A");
+    cmd.run()?;
+    Ok(())
+}
diff --git a/tests/generated/preview2_udp_sample_application.rs b/tests/generated/preview2_udp_sample_application.rs
new file mode 100644
index 000000000..0d0bbfee5
--- /dev/null
+++ b/tests/generated/preview2_udp_sample_application.rs
@@ -0,0 +1,23 @@
+//! This file has been auto-generated, please do not modify manually
+//! To regenerate this file re-run `cargo xtask generate tests` from the project root
+
+use std::fs;
+use tempdir::TempDir;
+use xshell::{cmd, Shell};
+
+#[test]
+fn preview2_udp_sample_application() -> anyhow::Result<()> {
+    let sh = Shell::new()?;
+    let file_name = "preview2_udp_sample_application";
+    let tempdir = TempDir::new("{file_name}")?;
+    let wasi_file = test_utils::compile(&sh, &tempdir, &file_name)?;
+    let _ = fs::remove_dir_all("./tests/rundir/preview2_udp_sample_application");
+
+    let cmd = cmd!(sh, "node ./src/jco.js run  --jco-dir ./tests/rundir/preview2_udp_sample_application --jco-import ./tests/virtualenvs/base.js {wasi_file} hello this '' 'is an argument' 'with 🚩 emoji'");
+
+    let cmd = cmd
+        .env("JCO_RUN_PATH", "deno")
+        .env("JCO_RUN_ARGS", "run --importmap importmap.json -A");
+    cmd.run()?;
+    Ok(())
+}
diff --git a/tests/generated/preview2_udp_sockopts.rs b/tests/generated/preview2_udp_sockopts.rs
new file mode 100644
index 000000000..af349a590
--- /dev/null
+++ b/tests/generated/preview2_udp_sockopts.rs
@@ -0,0 +1,23 @@
+//! This file has been auto-generated, please do not modify manually
+//! To regenerate this file re-run `cargo xtask generate tests` from the project root
+
+use std::fs;
+use tempdir::TempDir;
+use xshell::{cmd, Shell};
+
+#[test]
+fn preview2_udp_sockopts() -> anyhow::Result<()> {
+    let sh = Shell::new()?;
+    let file_name = "preview2_udp_sockopts";
+    let tempdir = TempDir::new("{file_name}")?;
+    let wasi_file = test_utils::compile(&sh, &tempdir, &file_name)?;
+    let _ = fs::remove_dir_all("./tests/rundir/preview2_udp_sockopts");
+
+    let cmd = cmd!(sh, "node ./src/jco.js run  --jco-dir ./tests/rundir/preview2_udp_sockopts --jco-import ./tests/virtualenvs/base.js {wasi_file} hello this '' 'is an argument' 'with 🚩 emoji'");
+
+    let cmd = cmd
+        .env("JCO_RUN_PATH", "deno")
+        .env("JCO_RUN_ARGS", "run --importmap importmap.json -A");
+    cmd.run()?;
+    Ok(())
+}
diff --git a/tests/generated/preview2_udp_states.rs b/tests/generated/preview2_udp_states.rs
new file mode 100644
index 000000000..d44ca8552
--- /dev/null
+++ b/tests/generated/preview2_udp_states.rs
@@ -0,0 +1,23 @@
+//! This file has been auto-generated, please do not modify manually
+//! To regenerate this file re-run `cargo xtask generate tests` from the project root
+
+use std::fs;
+use tempdir::TempDir;
+use xshell::{cmd, Shell};
+
+#[test]
+fn preview2_udp_states() -> anyhow::Result<()> {
+    let sh = Shell::new()?;
+    let file_name = "preview2_udp_states";
+    let tempdir = TempDir::new("{file_name}")?;
+    let wasi_file = test_utils::compile(&sh, &tempdir, &file_name)?;
+    let _ = fs::remove_dir_all("./tests/rundir/preview2_udp_states");
+
+    let cmd = cmd!(sh, "node ./src/jco.js run  --jco-dir ./tests/rundir/preview2_udp_states --jco-import ./tests/virtualenvs/base.js {wasi_file} hello this '' 'is an argument' 'with 🚩 emoji'");
+
+    let cmd = cmd
+        .env("JCO_RUN_PATH", "deno")
+        .env("JCO_RUN_ARGS", "run --importmap importmap.json -A");
+    cmd.run()?;
+    Ok(())
+}
diff --git a/tests/importmap.json b/tests/importmap.json
new file mode 100644
index 000000000..7dfb99bdb
--- /dev/null
+++ b/tests/importmap.json
@@ -0,0 +1,11 @@
+{
+  "imports": {
+    "@bytecodealliance/preview2-shim/filesystem": "../node_modules/@bytecodealliance/preview2-shim/lib/nodejs/filesystem.js",
+    "@bytecodealliance/preview2-shim/sockets": "../node_modules/@bytecodealliance/preview2-shim/lib/nodejs/sockets.js",
+    "@bytecodealliance/preview2-shim/clocks": "../node_modules/@bytecodealliance/preview2-shim/lib/nodejs/clocks.js",
+    "@bytecodealliance/preview2-shim/io": "../node_modules/@bytecodealliance/preview2-shim/lib/nodejs/io.js",
+    "@bytecodealliance/preview2-shim/http": "../node_modules/@bytecodealliance/preview2-shim/lib/nodejs/http.js",
+    "@bytecodealliance/preview2-shim/cli": "../node_modules/@bytecodealliance/preview2-shim/lib/nodejs/cli.js",
+    "@bytecodealliance/preview2-shim/random": "../node_modules/@bytecodealliance/preview2-shim/lib/nodejs/random.js"
+  }
+}
\ No newline at end of file
diff --git a/tests/server/index.js b/tests/server/index.js
index 0d2b82c36..1e0bc8154 100644
--- a/tests/server/index.js
+++ b/tests/server/index.js
@@ -4,6 +4,7 @@ import { readFileSync, rmdirSync, writeFileSync, symlinkSync } from "node:fs";
 import { fileURLToPath, pathToFileURL } from "node:url";
 import { $init, generate } from "../../obj/js-component-bindgen-component.js";
 import { fork } from "node:child_process";
+import process from "node:process";
 
 export const testDir = await mkdtemp('tests/output/server');
 
diff --git a/tests/virtualenvs/base.js b/tests/virtualenvs/base.js
index 5ec14ec03..d7502bf3e 100644
--- a/tests/virtualenvs/base.js
+++ b/tests/virtualenvs/base.js
@@ -4,6 +4,7 @@ import { mkdtemp, writeFile, mkdir } from 'node:fs/promises';
 import { rmdirSync } from 'node:fs';
 import { resolve } from 'node:path';
 import { platform } from 'node:process';
+import process from 'node:process';
 
 await mkdir("tests/output", { recursive: true });
 
diff --git a/tests/virtualenvs/http.js b/tests/virtualenvs/http.js
index 12d3da80e..7c8a034d5 100644
--- a/tests/virtualenvs/http.js
+++ b/tests/virtualenvs/http.js
@@ -17,4 +17,5 @@ _setEnv({
   'HTTP_SERVER': `localhost:${PORT}`
 });
 
-worker.unref();
+if (worker.unref)
+  worker.unref();
diff --git a/tests/virtualenvs/readonly.js b/tests/virtualenvs/readonly.js
index 81aeb0a50..91b650958 100644
--- a/tests/virtualenvs/readonly.js
+++ b/tests/virtualenvs/readonly.js
@@ -1,5 +1,6 @@
 import { chmodSync } from 'node:fs';
 import { resolve } from 'node:path';
+import process from 'node:process';
 
 process.on('exit', () => {
   chmodSync(testDir, 0o777);
diff --git a/tests/virtualenvs/scratch.js b/tests/virtualenvs/scratch.js
index 5ebf6c469..5352d3857 100644
--- a/tests/virtualenvs/scratch.js
+++ b/tests/virtualenvs/scratch.js
@@ -2,10 +2,10 @@ import { _setArgs, _setEnv } from "@bytecodealliance/preview2-shim/cli";
 import { _setPreopens } from "@bytecodealliance/preview2-shim/filesystem";
 import { mkdtemp } from 'node:fs/promises';
 import { rmdirSync } from 'node:fs';
-import { platform } from 'node:process';
+import process from 'node:process';
 
-const isWindows = platform === 'win32';
-const isMac = platform === 'darwin';
+const isWindows = process.platform === 'win32';
+const isMac = process.platform === 'darwin';
 
 const env = {
   FS_TIME_PRECISION: "2000",
diff --git a/xtask/src/generate/tests.rs b/xtask/src/generate/tests.rs
index 24b92f32e..a989ca862 100644
--- a/xtask/src/generate/tests.rs
+++ b/xtask/src/generate/tests.rs
@@ -3,10 +3,112 @@ use xshell::{cmd, Shell};
 
 // for debugging
 const TRACE: bool = false;
+const DENO: bool = true;
 const TEST_FILTER: &[&str] = &[];
 
 const TEST_IGNORE: &[&str] = &["nn_image_classification", "nn_image_classification_named"];
 
+// Deno cannot exit the process, pending https://github.com/denoland/deno/issues/22629
+const DENO_IGNORE: &[&str] = &[
+    "api_read_only",
+    "cli_default_clocks",
+    "cli_directory_list",
+    "cli_exit_panic",
+    "cli_export_cabi_realloc",
+    "cli_file_append",
+    "cli_file_dir_sync",
+    "cli_file_read",
+    "cli_hello_stdout",
+    "cli_no_ip_name_lookup",
+    "cli_no_tcp",
+    "cli_no_udp",
+    "cli_splice_stdin",
+    "cli_stdin",
+    "cli_stdio_write_flushes",
+    "http_outbound_request_content_length",
+    "http_outbound_request_get",
+    "http_outbound_request_invalid_dnsname",
+    "http_outbound_request_invalid_header",
+    "http_outbound_request_invalid_port",
+    "http_outbound_request_invalid_version",
+    "http_outbound_request_large_post",
+    "http_outbound_request_post",
+    "http_outbound_request_put",
+    "http_outbound_request_response_build",
+    "http_outbound_request_unknown_method",
+    "http_outbound_request_unsupported_scheme",
+    "piped_multiple",
+    "piped_polling",
+    "piped_simple",
+    "preview1_clock_time_get",
+    "preview1_close_preopen",
+    "preview1_dangling_fd",
+    "preview1_dangling_symlink",
+    "preview1_dir_fd_op_failures",
+    "preview1_directory_seek",
+    "preview1_fd_advise",
+    "preview1_fd_filestat_get",
+    "preview1_fd_filestat_set",
+    "preview1_fd_flags_set",
+    "preview1_fd_readdir",
+    "preview1_file_allocate",
+    "preview1_file_pread_pwrite",
+    "preview1_file_seek_tell",
+    "preview1_file_truncation",
+    "preview1_file_unbuffered_write",
+    "preview1_file_write",
+    "preview1_interesting_paths",
+    "preview1_nofollow_errors",
+    "preview1_overwrite_preopen",
+    "preview1_path_exists",
+    "preview1_path_filestat",
+    "preview1_path_link",
+    "preview1_path_open_create_existing",
+    "preview1_path_open_dirfd_not_dir",
+    "preview1_path_open_lots",
+    "preview1_path_open_missing",
+    "preview1_path_open_nonblock",
+    "preview1_path_open_preopen",
+    "preview1_path_open_read_write",
+    "preview1_path_rename",
+    "preview1_path_rename_dir_trailing_slashes",
+    "preview1_path_symlink_trailing_slashes",
+    "preview1_poll_oneoff_files",
+    "preview1_poll_oneoff_stdio",
+    "preview1_readlink",
+    "preview1_regular_file_isatty",
+    "preview1_remove_directory",
+    "preview1_remove_nonempty_directory",
+    "preview1_renumber",
+    "preview1_sched_yield",
+    "preview1_stdio",
+    "preview1_stdio_isatty",
+    "preview1_stdio_not_isatty",
+    "preview1_symlink_create",
+    "preview1_symlink_filestat",
+    "preview1_symlink_loop",
+    "preview1_unicode_output",
+    "preview1_unlink_file_trailing_slashes",
+    "preview2_adapter_badfd",
+    "preview2_ip_name_lookup",
+    "preview2_sleep",
+    "preview2_stream_pollable_correct",
+    "preview2_stream_pollable_traps",
+    "preview2_tcp_bind",
+    "preview2_tcp_connect",
+    "preview2_tcp_sample_application",
+    "preview2_tcp_sockopts",
+    "preview2_tcp_states",
+    "preview2_udp_bind",
+    "preview2_udp_connect",
+    "preview2_udp_sample_application",
+    "preview2_udp_sockopts",
+    "preview2_udp_states",
+    "proxy_echo",
+    "proxy_handler",
+    "proxy_hash",
+];
+
 // Tests that cannot be implemented on Windows
 const TEST_IGNORE_WINDOWS: &[&str] = &[
     // openAt implementation should carry directory permissions through to nested
@@ -57,7 +159,8 @@ pub fn run() -> anyhow::Result<()> {
         test_names
     };
 
-    for test_name in &test_names {
+    let mut all_names = Vec::new();
+    for test_name in test_names {
         let path = format!("submodules/wasmtime/target/wasm32-wasi/debug/{test_name}.wasm");
         // compile into generated dir
         let dest_file = format!("./tests/gen/{test_name}.component.wasm");
@@ -78,20 +181,30 @@ pub fn run() -> anyhow::Result<()> {
 
         let windows_skip = TEST_IGNORE_WINDOWS.contains(&test_name.as_ref());
 
-        let content = generate_test(&test_name, windows_skip);
-        let file_name = format!("tests/gen/{test_name}.rs");
-        fs::write(file_name, content)?;
+        let content = generate_test(&test_name, windows_skip, false);
+        fs::write(format!("tests/gen/{test_name}.rs"), content)?;
+
+        if DENO && !DENO_IGNORE.contains(&test_name.as_ref()) {
+            let content = generate_test(&test_name, windows_skip, true);
+            let test_name = format!("deno_{test_name}");
+            fs::write(format!("tests/gen/{test_name}.rs"), content)?;
+            all_names.push(test_name);
+        }
+
+        all_names.push(test_name);
     }
 
-    let content = generate_mod(test_names.as_slice());
+    all_names.sort();
+
+    let content = generate_mod(all_names.as_slice());
     let file_name = "tests/gen/mod.rs";
     fs::write(file_name, content)?;
-    println!("generated {} tests", test_names.len());
+    println!("generated {} tests", all_names.len());
     Ok(())
 }
 
 /// Generate an individual test
-fn generate_test(test_name: &str, windows_skip: bool) -> String {
+fn generate_test(test_name: &str, windows_skip: bool, deno: bool) -> String {
     let piped = test_name.starts_with("piped_");
     let virtual_env = match test_name {
         "api_read_only" => "readonly",
@@ -137,13 +250,14 @@ fn generate_test(test_name: &str, windows_skip: bool) -> String {
         let mut cmd1_child = cmd1.spawn().expect(\"failed to spawn test program\");",
         generate_command_invocation(
             "cmd1",
-            test_name,
+            &format!("{}{test_name}", if deno { "deno_" } else { "" }),
             virtual_env,
             if stdin.is_some() {
                 Some("Stdio::piped()")
             } else {
                 None
             },
+            deno
         ),
         if piped {
             "
@@ -163,6 +277,7 @@ fn generate_test(test_name: &str, windows_skip: bool) -> String {
                 &format!("{test_name}_consumer"),
                 &format!("{virtual_env}-consumer"),
                 None,
+                deno
             )
         )
     } else {
@@ -180,7 +295,7 @@ use std::fs;
 fn {test_name}() -> anyhow::Result<()> {{
     {}{{
         let wasi_file = "./tests/gen/{test_name}.component.wasm";
-        let _ = fs::remove_dir_all("./tests/rundir/{test_name}");
+        let _ = fs::remove_dir_all("./tests/rundir/{}{test_name}");
         {cmd1}
         {cmd2}{}let status = cmd{}_child.wait().expect("failed to wait on child");
         assert!({}status.success(), "test execution failed");
@@ -193,6 +308,7 @@ fn {test_name}() -> anyhow::Result<()> {{
         } else {
             ""
         },
+        if deno { "deno_" } else { "" },
         match stdin {
             Some(stdin) => format!(
                 "cmd1_child
@@ -216,12 +332,12 @@ fn generate_command_invocation(
     run_dir: &str,
     virtual_env: &str,
     stdin: Option<&str>,
+    deno: bool,
 ) -> String {
     return format!(
         r##"let mut {cmd_name} = Command::new("node");
         {cmd_name}.arg("./src/jco.js");
-        {cmd_name}.arg("run");
-{}
+        {cmd_name}.arg("run");{}{}
         {cmd_name}.arg("--jco-dir");
         {cmd_name}.arg("./tests/rundir/{run_dir}");
         {cmd_name}.arg("--jco-import");
@@ -230,7 +346,19 @@ fn generate_command_invocation(
         {cmd_name}.args(&["hello", "this", "", "is an argument", "with 🚩 emoji"]);
         {cmd_name}.stdin({});"##,
         if TRACE {
-            format!("       {cmd_name}.arg(\"--jco-trace\");")
+            format!(
+                "
+        {cmd_name}.arg(\"--jco-trace\");"
+            )
+        } else {
+            "".into()
+        },
+        if deno {
+            format!(
+                "
+        {cmd_name}.env(\"JCO_RUN_PATH\", \"deno\")
+            .env(\"JCO_RUN_ARGS\", \"run --importmap ./tests/importmap.json -A\");"
+            )
         } else {
             "".into()
         },