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.
Scheduler.unstable_yieldValue('Foo');
      return (
        <Suspense fallback={<Text text="Loading..." />}>
          {renderContent ? <AsyncText text="A" ms={5000} /> : null}
        </Suspense>
      );
    }
    ReactNoop.render(<Foo />);
    expect(Scheduler).toFlushAndYield(['Foo']);
    ReactNoop.render(<Foo renderContent={true} />);
    Scheduler.unstable_advanceTime(100);
    await advanceTimers(100);
    
    expect(Scheduler).toFlushAndYieldThrough(['Foo']);
    
    Scheduler.unstable_advanceTime(1250);
    await advanceTimers(1250);