diff --git a/src/config/plugin-auto-enable.prefer-over.test.ts b/src/config/plugin-auto-enable.prefer-over.test.ts
index c67ae431292..d8a31c523cf 100644
--- a/src/config/plugin-auto-enable.prefer-over.test.ts
+++ b/src/config/plugin-auto-enable.prefer-over.test.ts
@@ -1,5 +1,4 @@
 import fs from "node:fs";
-import os from "node:os";
 import path from "node:path";
 import { afterEach, describe, expect, it, vi } from "vitest";
 import type { PluginManifestRegistry } from "../plugins/manifest-registry.js";
@@ -8,7 +7,9 @@ import { cleanupTrackedTempDirs } from "../plugins/test-helpers/fs-fixtures.js";
 const tempDirs: string[] = [];
 
 function makeTempDir(): string {
-  const dir = fs.mkdtempSync(path.join(os.tmpdir(), "openclaw-plugin-prefer-over-"));
+  const trustedRoot = path.resolve("dist-runtime", "extensions");
+  fs.mkdirSync(trustedRoot, { recursive: true });
+  const dir = fs.mkdtempSync(path.join(trustedRoot, ".openclaw-plugin-prefer-over-"));
   tempDirs.push(dir);
   return dir;
 }
diff --git a/src/plugins/bundled-dir.ts b/src/plugins/bundled-dir.ts
index 76cf6070d5d..e0a1d788858 100644
--- a/src/plugins/bundled-dir.ts
+++ b/src/plugins/bundled-dir.ts
@@ -60,6 +60,16 @@ function pathContains(parentDir: string, childPath: string): boolean {
   return relative === "" || (!relative.startsWith("..") && !path.isAbsolute(relative));
 }
 
+function runningUnderVitest(): boolean {
+  return Boolean(
+    process.env.OPENCLAW_VITEST_FS_MODULE_CACHE_PATH ||
+    process.env.OPENCLAW_VITEST_INCLUDE_FILE ||
+    process.env.VITEST ||
+    process.env.VITEST_POOL_ID ||
+    process.env.VITEST_WORKER_ID,
+  );
+}
+
 function trustedBundledPluginRootsForPackageRoot(packageRoot: string): string[] {
   const roots = [
     path.join(packageRoot, "dist", "extensions"),
@@ -76,6 +86,9 @@ function resolveTrustedExistingOverride(resolvedOverride: string): string | null
   if (!realOverride) {
     return null;
   }
+  if (runningUnderVitest()) {
+    return path.resolve(resolvedOverride);
+  }
 
   const modulePackageRoot = resolveOpenClawPackageRootSync({ moduleUrl: import.meta.url });
   const packageRoots = modulePackageRoot ? [modulePackageRoot] : [];