diff --git a/test/policies.test.js b/test/policies.test.js
index 5b3782c03d..eff66073aa 100644
--- a/test/policies.test.js
+++ b/test/policies.test.js
@@ -2,6 +2,8 @@
 // SPDX-License-Identifier: Apache-2.0
 
 import assert from "node:assert/strict";
+import fs from "node:fs";
+import os from "node:os";
 import { describe, it, expect } from "vitest";
 import policies from "../bin/lib/policies";
 
@@ -158,4 +160,49 @@ describe("policies", () => {
       }
     });
   });
+
+  describe("applyPreset", () => {
+    it("adds a version header before appending preset entries to versionless policies", () => {
+      const fakeBinDir = fs.mkdtempSync(path.join(os.tmpdir(), "nemoclaw-openshell-"));
+      const capturedPolicy = path.join(fakeBinDir, "captured-policy.yaml");
+      const fakeOpenShell = path.join(fakeBinDir, "openshell");
+      const originalPath = process.env.PATH || "";
+      const originalCaptureFile = process.env.TEST_CAPTURE_FILE;
+
+      fs.writeFileSync(fakeOpenShell, `#!/bin/sh
+if [ "$1" = "policy" ] && [ "$2" = "get" ] && [ "$3" = "--full" ]; then
+  printf 'filesystem:\\n  mode: strict\\n'
+  exit 0
+fi
+if [ "$1" = "policy" ] && [ "$2" = "set" ]; then
+  while [ "$#" -gt 0 ]; do
+    if [ "$1" = "--policy" ]; then
+      cp "$2" "$TEST_CAPTURE_FILE"
+      exit 0
+    fi
+    shift
+  done
+fi
+exit 1
+`, { mode: 0o755 });
+
+      process.env.PATH = `${fakeBinDir}:${originalPath}`;
+      process.env.TEST_CAPTURE_FILE = capturedPolicy;
+
+      try {
+        assert.equal(policies.applyPreset("demo", "telegram"), true);
+        const merged = fs.readFileSync(capturedPolicy, "utf-8");
+        assert.match(merged, /^version: 1\nfilesystem:\n  mode: strict\n\nnetwork_policies:\n/m);
+        assert.match(merged, /name: telegram/);
+        assert.match(merged, /host: api\.telegram\.org/);
+      } finally {
+        process.env.PATH = originalPath;
+        if (originalCaptureFile === undefined) {
+          delete process.env.TEST_CAPTURE_FILE;
+        } else {
+          process.env.TEST_CAPTURE_FILE = originalCaptureFile;
+        }
+      }
+    });
+  });
 });