run with --detectOpenHandles

Author: vanGalilea

.github/workflows/example-apps.yml

@@ -32,4 +32,4 @@ jobs:
         run: yarn --cwd examples/${{ matrix.example }} typecheck
 
       - name: Test
-        run: yarn --cwd examples/${{ matrix.example }} test
+        run: yarn --cwd examples/${{ matrix.example }} test --detectOpenHandles

examples/cookbook/app/network-requests/__tests__/PhoneBook.test.tsx

@@ -6,8 +6,7 @@ import { User } from '../types';
 
 jest.mock('axios');
 
-// jest.setTimeout(10000);
-jest.useFakeTimers();
+jest.setTimeout(10000);
 describe('PhoneBook', () => {
   it('fetches contacts successfully and renders in list', async () => {
     (global.fetch as jest.Mock).mockResolvedValueOnce({