diff --git a/test/index.test.ts b/test/index.test.ts
index b97f98542..40effaac9 100644
--- a/test/index.test.ts
+++ b/test/index.test.ts
@@ -1,7 +1,6 @@
 import fetchMock, { type MockMatcherFunction } from "fetch-mock";
 
 import { request } from "@octokit/request";
-import { install, type InstalledClock } from "@sinonjs/fake-timers";
 import { jest } from "@jest/globals";
 
 import { createAppAuth, createOAuthUserAuth } from "../src/index.ts";
@@ -39,9 +38,8 @@ x//0u+zd/R/QRUzLOw4N72/Hu+UG6MNt5iDZFCtapRaKt6OvSBwy8w==
 const BEARER =
   "eyJhbGciOiJSUzI1NiIsInR5cCI6IkpXVCJ9.eyJpYXQiOi0zMCwiZXhwIjo1NzAsImlzcyI6MX0.q3foRa78U3WegM5PrWLEh5N0bH1SD62OqW66ZYzArp95JBNiCbo8KAlGtiRENCIfBZT9ibDUWy82cI4g3F09mdTq3bD1xLavIfmTksIQCz5EymTWR5v6gL14LSmQdWY9lSqkgUG0XCFljWUglEP39H4yeHbFgdjvAYg3ifDS12z9oQz2ACdSpvxPiTuCC804HkPVw8Qoy0OSXvCkFU70l7VXCVUxnuhHnk8-oCGcKUspmeP6UdDnXk-Aus-eGwDfJbU2WritxxaXw6B4a3flTPojkYLSkPBr6Pi0H2-mBsW_Nvs0aLPVLKobQd4gqTkosX3967DoAG8luUMhrnxe8Q";
 
-let clock: InstalledClock;
 beforeEach(() => {
-  clock = install({ now: 0, toFake: ["Date", "setTimeout"] });
+  jest.useFakeTimers().setSystemTime(0);
 });
 
 test("README example for app auth", async () => {
@@ -1581,7 +1579,8 @@ test("auth.hook(): handle 401 due to an exp timestamp in the past with 800 secon
   const fakeTimeMs = 1029392939;
   const githubTimeMs = fakeTimeMs + 800000;
 
-  clock = install({ now: fakeTimeMs, toFake: ["Date", "setTimeout"] });
+  jest.setSystemTime(fakeTimeMs);
+
   const mock = fetchMock
     .sandbox()
     .get("https://api.github.com/app", (_url, options) => {
@@ -1850,9 +1849,11 @@ test("auth.hook(): handle 401 in first 5 seconds (#65)", async () => {
   const promise = requestWithAuth("GET /repos/octocat/hello-world");
 
   // it takes 3 retries until a total time of more than 5s pass
-  await clock.tickAsync(1000);
-  await clock.tickAsync(2000);
-  await clock.tickAsync(3000);
+  // Note sure why the first advance is needed, but it helped unblock https://github.com/octokit/auth-app.js/pull/580
+  await jest.advanceTimersByTimeAsync(100);
+  await jest.advanceTimersByTimeAsync(1000);
+  await jest.advanceTimersByTimeAsync(2000);
+  await jest.advanceTimersByTimeAsync(3000);
 
   const { data } = await promise;
 
@@ -1872,6 +1873,7 @@ test("auth.hook(): handle 401 in first 5 seconds (#65)", async () => {
 
 test("auth.hook(): throw error with custom message after unsuccessful retries (#163)", async () => {
   expect.assertions(1);
+  global.console.warn = jest.fn();
 
   const mock = fetchMock
     .sandbox()
@@ -1913,18 +1915,23 @@ test("auth.hook(): throw error with custom message after unsuccessful retries (#
     },
   });
 
-  global.console.warn = jest.fn();
+  const promise = requestWithAuth("GET /repos/octocat/hello-world");
 
-  requestWithAuth("GET /repos/octocat/hello-world").catch((error) => {
+  promise.catch((error) => {
     expect(error.message).toBe(
       `After 3 retries within 6s of creating the installation access token, the response remains 401. At this point, the cause may be an authentication problem or a system outage. Please check https://www.githubstatus.com for status information`,
     );
   });
 
   // it takes 3 retries until a total time of more than 5s pass
-  await clock.tickAsync(1000);
-  await clock.tickAsync(2000);
-  await clock.tickAsync(3000);
+  // Note sure why the first advance is needed, but it helped unblock https://github.com/octokit/auth-app.js/pull/580
+  await jest.advanceTimersByTimeAsync(100);
+  await jest.advanceTimersByTimeAsync(1000);
+  await jest.advanceTimersByTimeAsync(2000);
+  await jest.advanceTimersByTimeAsync(3000);
+  await jest.runAllTimersAsync();
+
+  await promise;
 });
 
 test("auth.hook(): throws on 500 error without retries", async () => {