diff --git a/src/cli/browser-cli-extension.test.ts b/src/cli/browser-cli-extension.test.ts
index 22a9d4f99..f92a264c7 100644
--- a/src/cli/browser-cli-extension.test.ts
+++ b/src/cli/browser-cli-extension.test.ts
@@ -1,18 +1,20 @@
 import fs from "node:fs";
+import os from "node:os";
 import path from "node:path";
 import { describe, expect, it } from "vitest";
 import { installChromeExtension } from "./browser-cli-extension";
 
-// This test ensures the bundled extension path resolution matches the npm package layout.
-// The install command should succeed without requiring any external symlinks.
-
 describe("browser extension install", () => {
   it("installs bundled chrome extension into a state dir", async () => {
-    const tmp = path.join(process.cwd(), ".tmp-test-openclaw-state", String(Date.now()));
+    const tmp = fs.mkdtempSync(path.join(os.tmpdir(), "openclaw-ext-state-"));
 
-    const result = await installChromeExtension({ stateDir: tmp });
+    try {
+      const result = await installChromeExtension({ stateDir: tmp });
 
-    expect(result.path).toContain(path.join("browser", "chrome-extension"));
-    expect(fs.existsSync(path.join(result.path, "manifest.json"))).toBe(true);
+      expect(result.path).toBe(path.join(tmp, "browser", "chrome-extension"));
+      expect(fs.existsSync(path.join(result.path, "manifest.json"))).toBe(true);
+    } finally {
+      fs.rmSync(tmp, { recursive: true, force: true });
+    }
   });
 });
diff --git a/src/cli/browser-cli-extension.ts b/src/cli/browser-cli-extension.ts
index e0663c750..cc3ceca2e 100644
--- a/src/cli/browser-cli-extension.ts
+++ b/src/cli/browser-cli-extension.ts
@@ -15,10 +15,11 @@ import { formatCliCommand } from "./command-format.js";
 function bundledExtensionRootDir() {
   const here = path.dirname(fileURLToPath(import.meta.url));
 
-  // `dist/` lives at `<packageRoot>/dist` in npm installs.
+  // `here` is the directory containing this file.
+  // - In npm installs, that's typically `<packageRoot>/dist/cli`.
+  // - In source runs/tests, it's typically `<packageRoot>/src/cli`.
   // The bundled extension lives at `<packageRoot>/assets/chrome-extension`.
-  // So we need to go up ONE level from `dist`.
-  return path.resolve(here, "../assets/chrome-extension");
+  return path.resolve(here, "../../assets/chrome-extension");
 }
 
 function installedExtensionRootDir() {