diff --git a/src/plugins/services.test.ts b/src/plugins/services.test.ts
index 9b49e971cd6..3844ba5067d 100644
--- a/src/plugins/services.test.ts
+++ b/src/plugins/services.test.ts
@@ -78,6 +78,14 @@ function expectServiceLifecycleState(params: {
   expectServiceContexts(params.contexts, params.config);
 }
 
+function requireLoggerErrorMessage(index = 0): string {
+  const call = mockedLogger.error.mock.calls.at(index);
+  if (!call) {
+    throw new Error(`expected logger error call ${index}`);
+  }
+  return call[0];
+}
+
 async function startTrackingServices(params: {
   services: OpenClawPluginService[];
   config?: Parameters<typeof startPluginServices>[0]["config"];
@@ -174,7 +182,7 @@ describe("startPluginServices", () => {
         "plugin service failed (service-start-fail, plugin=plugin:test, root=/plugins/test-plugin): start failed",
       ],
     ]);
-    expect(mockedLogger.error.mock.calls[0]?.[0]).not.toContain("\n");
+    expect(requireLoggerErrorMessage()).not.toContain("\n");
     expect(mockedLogger.warn.mock.calls).toEqual([
       ["plugin service stop failed (service-stop-fail): Error: stop failed"],
     ]);