diff --git a/extensions/browser/test-support/browser-security-runtime.mock.ts b/extensions/browser/test-support/browser-security-runtime.mock.ts
deleted file mode 100644
index e41785b3fca..00000000000
--- a/extensions/browser/test-support/browser-security-runtime.mock.ts
+++ /dev/null
@@ -1,16 +0,0 @@
-import { vi } from "vitest";
-
-vi.mock("openclaw/plugin-sdk/browser-security-runtime", async () => {
-  const actual = await vi.importActual<
-    typeof import("openclaw/plugin-sdk/browser-security-runtime")
-  >("openclaw/plugin-sdk/browser-security-runtime");
-  const lookupFn = async (_hostname: string, options?: { all?: boolean }) => {
-    const result = { address: "93.184.216.34", family: 4 };
-    return options?.all === true ? [result] : result;
-  };
-  return {
-    ...actual,
-    resolvePinnedHostnameWithPolicy: (hostname: string, params: object = {}) =>
-      actual.resolvePinnedHostnameWithPolicy(hostname, { ...params, lookupFn: lookupFn as never }),
-  };
-});