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.
return <SuspenseList revealOrder="forwards">{children}</SuspenseList>;
    }
    ReactNoop.render(<Foo />);
    
    Scheduler.unstable_flushAll();
    ReactNoop.render(<Foo>{null}</Foo>);
    
    Scheduler.unstable_flushAll();
    ReactNoop.render(<Foo>{false}</Foo>);
    
    Scheduler.unstable_flushAll();
    ReactNoop.render(
      <Foo>
        <Suspense fallback="Loading">Child</Suspense>
      </Foo>,
    );
    expect(() => Scheduler.unstable_flushAll()).toErrorDev([
      'Warning: A single row was passed to a <SuspenseList revealOrder="forwards" />. ' +
        'This is not useful since it needs multiple rows. ' +
        'Did you mean to pass multiple children or an array?' +
        '\n    in SuspenseList (at **)' +
        '\n    in Foo (at **)',
    ]);
  });
  it('warns if a single fragment is passed to a "backwards" list', () => {
    function Foo() {