https://codesandbox.io/s/upbeat-frost-3tt25

1. Press Suspend, see "Loading..."
2. Wait five seconds, you'll see "Happy birthday" at some point 
3. You won't see it again no matter how long you wait

Expected: you'll see it every five seconds.
'Loading...',
    ]);
    expect(ReactNoop.getChildren()).toEqual([span('Loading...')]);
    
    Scheduler.unstable_advanceTime(5000);
    await advanceTimers(5000);
    expect(Scheduler).toHaveYielded(['Promise resolved [A]']);
    
    expect(Scheduler).toFlushAndYield([
      'A',
      
      'Suspend! [B]',
      'Loading more...',
    ]);
    
    
    expect(ReactNoop.getChildren()).toEqual([
      span('A'),
      span('Loading more...'),
    ]);
    
    Scheduler.unstable_advanceTime(5000);
    await advanceTimers(5000);
    
    expect(Scheduler).toHaveYielded(['Promise resolved [B]']);
    expect(Scheduler).toFlushAndYield(['B']);
    expect(ReactNoop.getChildren()).toEqual([span('A'), span('B')]);
  });
  it('does suspend if a fallback has been shown for a short time', async () => {
    function Foo() {