diff --git a/src/index.ts b/src/index.ts
index fd7319d..9db9737 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -182,7 +182,7 @@ async function runGlobs(options: Options, pluginsDefaultOptions: PluginsOptions,
         const filePath = filesPathsTargets[i];
         const fileNameToDisplay = normalizeToPosix(fastRelativePath(rootPath, filePath));
         //TODO: Make sure the error is syntax-highlighted when possible
-        if (options.check || options.write) {
+        if (options.check || options.write || options.dump) {
           stderr.prefixed.error(`${fileNameToDisplay}: ${error}`);
         } else if (options.list) {
           stderr.error(fileNameToDisplay);
diff --git a/src/utils.ts b/src/utils.ts
index decbab3..454bcf0 100644
--- a/src/utils.ts
+++ b/src/utils.ts
@@ -736,10 +736,7 @@ function zipObjectUnless<T extends Key, U>(keys: T[], values: U[], unless: (valu
 /**
  * Replace `\` with `/` on Windows
  */
-const normalizeToPosix =
-  path.sep === "\\"
-    ? (filepath: string): string => filepath.replaceAll("\\", "/")
-    : (filepath: string): string => filepath;
+const normalizeToPosix = path.sep === "\\" ? (filepath: string): string => filepath.replaceAll("\\", "/") : (filepath: string): string => filepath;
 
 export {
   castArray,
diff --git a/test/__fixtures__/infer-parser/FOO b/test/__fixtures__/infer-parser/FOO
new file mode 100644
index 0000000..e69de29
diff --git a/test/__fixtures__/infer-parser/foo.js b/test/__fixtures__/infer-parser/foo.js
new file mode 100644
index 0000000..9da4d43
--- /dev/null
+++ b/test/__fixtures__/infer-parser/foo.js
@@ -0,0 +1 @@
+foo  (    )
diff --git a/test/__fixtures__/infer-parser/interpreters/zx-script b/test/__fixtures__/infer-parser/interpreters/zx-script
new file mode 100644
index 0000000..074fca5
--- /dev/null
+++ b/test/__fixtures__/infer-parser/interpreters/zx-script
@@ -0,0 +1,3 @@
+#!/usr/bin/env zx
+
+await $`cat package.json | grep name`
diff --git a/test/__fixtures__/infer-parser/known-unknown/known.js b/test/__fixtures__/infer-parser/known-unknown/known.js
new file mode 100644
index 0000000..a77f53e
--- /dev/null
+++ b/test/__fixtures__/infer-parser/known-unknown/known.js
@@ -0,0 +1,2 @@
+hello( 'world'
+)
diff --git a/test/__fixtures__/infer-parser/known-unknown/unknown.jsonl b/test/__fixtures__/infer-parser/known-unknown/unknown.jsonl
new file mode 100644
index 0000000..9720dd6
--- /dev/null
+++ b/test/__fixtures__/infer-parser/known-unknown/unknown.jsonl
@@ -0,0 +1,4 @@
+{"name": "Gilbert", "wins": [["straight", "7♣"], ["one pair", "10♥"]]}
+{"name": "Alexa", "wins": [["two pair", "4♠"], ["two pair", "9♠"]]}
+{"name": "May", "wins": []}
+{"name": "Deloise", "wins": [["three of a kind", "5♣"]]}
diff --git a/test/__tests__/__snapshots__/early-exit.js.snap b/test/__tests__/__snapshots__/early-exit.js.snap
index 0012bdb..8f09756 100644
--- a/test/__tests__/__snapshots__/early-exit.js.snap
+++ b/test/__tests__/__snapshots__/early-exit.js.snap
@@ -1,10 +1,8 @@
 // Jest Snapshot v1, https://goo.gl/fbAQLP
 
-exports[`show usage with --help (stderr) 1`] = `""`;
-
-exports[`show usage with --help (stdout) 1`] = `
+exports[`show usage with --help shows help text 1`] = `
 "  
-  prettier 3.5.3
+  prettier $VERSION
   
   USAGE
     
@@ -134,7 +132,9 @@ exports[`show usage with --help (stdout) 1`] = `
     "
 `;
 
-exports[`show usage with --help (write) 1`] = `[]`;
+exports[`show usage with --help shows help text 2`] = `""`;
+
+exports[`show usage with --help shows help text 3`] = `[]`;
 
 exports[`show version with --version (stderr) 1`] = `""`;
 
diff --git a/test/__tests__/__snapshots__/infer-parser.js.snap b/test/__tests__/__snapshots__/infer-parser.js.snap
new file mode 100644
index 0000000..f96466e
--- /dev/null
+++ b/test/__tests__/__snapshots__/infer-parser.js.snap
@@ -0,0 +1,48 @@
+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`--check with unknown path and no parser multiple files (stdout) 1`] = `"Checking formatting..."`;
+
+exports[`--check with unknown path and no parser specific file is ignored (stderr) 1`] = `""`;
+
+exports[`--check with unknown path and no parser specific file is ignored (stdout) 1`] = `
+"Checking formatting...
+All matched files use Prettier code style!"
+`;
+
+exports[`--list-different with unknown path and no parser multiple files (stderr) 1`] = `"FOO"`;
+
+exports[`--list-different with unknown path and no parser specific file should be ignored (stderr) 1`] = `""`;
+
+exports[`--write with unknown path and no parser multiple files (stdout) 1`] = `"foo.js"`;
+
+exports[`--write with unknown path and no parser multiple files (write) 1`] = `
+[
+  {
+    "content": "foo();
+",
+    "filename": "foo.js",
+  },
+]
+`;
+
+exports[`--write with unknown path and no parser specific file should be ignored (stderr) 1`] = `""`;
+
+exports[`Known/Unknown (stdout) 1`] = `"known.js"`;
+
+exports[`stdin no path and no parser --check logs error but exits with 1 (stderr) 1`] = `"[error] UndefinedParserError: No parser could be inferred for file "stdin"."`;
+
+exports[`stdin no path and no parser --list-different logs error but exits with 1 (stderr) 1`] = `"[error] UndefinedParserError: No parser could be inferred for file "stdin"."`;
+
+exports[`stdin no path and no parser logs error and exits with 2 (stderr) 1`] = `"[error] UndefinedParserError: No parser could be inferred for file "stdin"."`;
+
+exports[`stdin with unknown path and no parser --check logs error but exits with 1 (stderr) 1`] = `"[error] UndefinedParserError: No parser could be inferred for file "foo"."`;
+
+exports[`stdin with unknown path and no parser --list-different logs error but exits with 1 (stderr) 1`] = `"[error] UndefinedParserError: No parser could be inferred for file "foo"."`;
+
+exports[`stdin with unknown path and no parser logs error and exits with 2 (stderr) 1`] = `"[error] UndefinedParserError: No parser could be inferred for file "foo"."`;
+
+exports[`unknown path and no parser multiple files are ignored (stderr) 1`] = `"[error] FOO: UndefinedParserError: No parser could be inferred for file "$CWD/FOO"."`;
+
+exports[`unknown path and no parser multiple files are ignored (stdout) 1`] = `"foo();"`;
+
+exports[`unknown path and no parser specific file is ignored (stderr) 1`] = `""`;
diff --git a/test/__tests__/early-exit.js b/test/__tests__/early-exit.js
index f6fb6f5..143b4ca 100644
--- a/test/__tests__/early-exit.js
+++ b/test/__tests__/early-exit.js
@@ -11,10 +11,14 @@ describe("show version with --version", () => {
 });
 
 describe("show usage with --help", () => {
-  runCli("", [
-    "--help",
-  ]).test({
-    status: 0,
+  it("shows help text", async () => {
+    const result = await runCli("", [
+      "--help",
+    ]);
+    expect(result.status).toBe(0);
+    expect(result.stdout.replaceAll(PRETTIER_VERSION, "$VERSION")).toMatchSnapshot();
+    expect(result.stderr).toMatchSnapshot();
+    expect(result.write).toMatchSnapshot();
   });
 });
 
diff --git a/test/__tests__/infer-parser.js b/test/__tests__/infer-parser.js
new file mode 100644
index 0000000..2237bc1
--- /dev/null
+++ b/test/__tests__/infer-parser.js
@@ -0,0 +1,158 @@
+import { runCli } from "../utils";
+import { color } from "specialist";
+
+describe("stdin no path and no parser", () => {
+  describe("logs error and exits with 2", () => {
+    runCli("infer-parser/", [], { input: "foo" }).test({
+      status: 1,
+      stdout: "",
+      write: [],
+    });
+  });
+
+  // TODO (43081j): in prettier, this tests that it exits with 0 for
+  // whatever reason. should we do the same?
+  describe("--check logs error but exits with 1", () => {
+    runCli("infer-parser/", ["--check"], {
+      input: "foo",
+    }).test({
+      status: 1,
+      stdout: "",
+      write: [],
+    });
+  });
+
+  // TODO (43081j): in prettier, this tests that it exits with 0 for
+  // whatever reason. should we do the same?
+  describe("--list-different logs error but exits with 1", () => {
+    runCli("infer-parser/", ["--list-different"], {
+      input: "foo",
+    }).test({
+      status: 1,
+      stdout: "",
+      write: [],
+    });
+  });
+});
+
+describe("stdin with unknown path and no parser", () => {
+  describe("logs error and exits with 2", () => {
+    runCli("infer-parser/", ["--stdin-filepath", "foo"], {
+      input: "foo",
+    }).test({
+      status: 1,
+      stdout: "",
+      write: [],
+    });
+  });
+
+  // TODO (43081j): in prettier, this tests that it exits with 0 for
+  // whatever reason. should we do the same?
+  describe("--check logs error but exits with 1", () => {
+    runCli("infer-parser/", ["--check", "--stdin-filepath", "foo"], {
+      input: "foo",
+    }).test({
+      status: 1,
+      stdout: "",
+      write: [],
+    });
+  });
+
+  // TODO (43081j): in prettier, this tests that it exits with 0 for
+  // whatever reason. should we do the same?
+  describe("--list-different logs error but exits with 1", () => {
+    runCli(
+      "infer-parser/",
+      ["--list-different", "--stdin-filepath", "foo"],
+      { input: "foo" },
+    ).test({
+      status: 1,
+      stdout: "",
+      write: [],
+    });
+  });
+});
+
+describe("unknown path and no parser", () => {
+  describe("specific file is ignored", () => {
+    runCli("infer-parser/", ["--end-of-line", "lf", "FOO"]).test({
+      status: 0,
+      stdout: "",
+      write: [],
+    });
+  });
+
+  describe("multiple files are ignored", () => {
+    runCli("infer-parser/", ["--end-of-line", "lf", "*"]).test({
+      status: 1,
+      write: [],
+    });
+  });
+});
+
+describe("--check with unknown path and no parser", () => {
+  describe("specific file is ignored", () => {
+    runCli("infer-parser/", ["--check", "FOO"]).test({
+      status: 0,
+      write: [],
+    });
+  });
+
+  describe("multiple files", () => {
+    runCli("infer-parser/", ["--check", "*"]).test({
+      status: 1,
+      write: [],
+      stderr: `[${color.red('error')}] FOO: UndefinedParserError: No parser could be inferred for file "$CWD/FOO".
+[${color.yellow('warn')}] foo.js
+[${color.yellow('warn')}] Code style issues found in 1 file. Run Prettier with --write to fix.`
+    });
+  });
+});
+
+describe("--list-different with unknown path and no parser", () => {
+  describe("specific file should be ignored", () => {
+    runCli("infer-parser/", ["--list-different", "FOO"]).test({
+      status: 0,
+      stdout: "",
+      write: [],
+    });
+  });
+
+  describe("multiple files", () => {
+    runCli("infer-parser/", ["--list-different", "*"]).test({
+      status: 1,
+      stdout: "foo.js",
+      write: [],
+    });
+  });
+});
+
+describe("--write with unknown path and no parser", () => {
+  describe("specific file should be ignored", () => {
+    runCli("infer-parser/", ["--write", "FOO"]).test({
+      status: 0,
+      stdout: "",
+      write: [],
+    });
+  });
+
+  describe("multiple files", () => {
+    runCli("infer-parser/", ["--write", "*"]).test({
+      status: 1,
+      stderr: `[${color.red('error')}] FOO: UndefinedParserError: No parser could be inferred for file "$CWD/FOO".`,
+    });
+  });
+});
+
+describe("Known/Unknown", () => {
+  runCli("infer-parser/known-unknown", [
+    "--end-of-line",
+    "lf",
+    "--list-different",
+    ".",
+  ]).test({
+    status: 1,
+    stderr: "",
+    write: [],
+  });
+});
diff --git a/test/utils.js b/test/utils.js
index 10dd8cc..2f9da29 100644
--- a/test/utils.js
+++ b/test/utils.js
@@ -97,12 +97,13 @@ async function getIsolatedFixtures(dir) {
   };
 }
 
-function getNormalizedOutput(output, options) {
+function getNormalizedOutput(output, cwd) {
   // \r is trimmed from jest snapshots by default;
   // manually replacing this character with /*CR*/ to test its true presence
   // If ignoreLineEndings is specified, \r is simply deleted instead
   // output = output.replace(/\r/gu, options.ignoreLineEndings ? "" : "/*CR*/"); //TODO
   output = output.replace(/(\r?\n|\r)$/, "");
+  output = output.replaceAll(cwd, "$CWD");
   return output;
 }
 
@@ -125,8 +126,8 @@ async function runCommand(dir, args, options) {
   }
 
   const status = await result.code;
-  const stdout = getNormalizedOutput((await result.stdout).toString());
-  const stderr = getNormalizedOutput((await result.stderr).toString());
+  const stdout = getNormalizedOutput((await result.stdout).toString(), cwd);
+  const stderr = getNormalizedOutput((await result.stderr).toString(), cwd);
   const write = (await archive?.getDiff()) || [];
 
   await fixtures?.dispose();