@Output() selectionChange = new ReplaySubject<string>(1);

const spy = jasmine.createSpy();
spectator.output('selectionChange').subscribe(spy);

Overload 1 of 3, '(output: never): never', gave the following error.
    Argument of type 'string' is not assignable to parameter of type 'never'.
  Overload 2 of 3, '(output: never): Observable<unknown>', gave the following error.
    Argument of type 'string' is not assignable to parameter of type 'never'.
  Overload 3 of 3, '(output: never): OutputEmitterRef<unknown>', gave the following error.
    Argument of type 'string' is not assignable to parameter of type 'never'.

Angular 18.2
Spectator 19.3