diff --git a/extensions/mattermost/src/mattermost/reconnect.test.ts b/extensions/mattermost/src/mattermost/reconnect.test.ts
index 5fa1889704d..99b9dc89c28 100644
--- a/extensions/mattermost/src/mattermost/reconnect.test.ts
+++ b/extensions/mattermost/src/mattermost/reconnect.test.ts
@@ -1,10 +1,15 @@
-import { beforeEach, describe, expect, it, vi } from "vitest";
+import { afterEach, beforeEach, describe, expect, it, vi } from "vitest";
 import { runWithReconnect } from "./reconnect.js";
 
 beforeEach(() => {
+  vi.useRealTimers();
   vi.clearAllMocks();
 });
 
+afterEach(() => {
+  vi.useRealTimers();
+});
+
 describe("runWithReconnect", () => {
   it("retries after connectFn resolves (normal close)", async () => {
     let callCount = 0;