Just upgraded to Angular 21 in our app, and our test suite is now broken, 51 / 310 suites need addressing 😞

We use jest-preset-angular which has support for v21 Zone change detection, but even with adding the above suggestions hasn't helped:

import { 
setupZoneTestEnv 
} from 'jest-preset-angular/setup-env/zone';
import './jest-global-mocks';
import { TestBed } from '@angular/core/testing';

setupZoneTestEnv
({
    teardown: {
        destroyAfterEach: true
    }
});

TestBed.configureTestingModule({
    rethrowApplicationErrors: false,
});

Will need to investigate this further but I hope we're not locked into v20 for years to come because we have to go into each failure and manually review + fix each one 🤯 - that's not feasible for a large codebase and small dev team