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" tail="collapse">
          <Suspense fallback="Loading">A</Suspense>
          <Suspense fallback="Loading">B</Suspense>
        </SuspenseList>
      );
    }
    ReactNoop.render(<Foo />);
    expect(() => Scheduler.unstable_flushAll()).toErrorDev([
      'Warning: "collapse" is not a supported value for tail on ' +
        '<SuspenseList />. Did you mean "collapsed" or "hidden"?' +
        '\n    in SuspenseList (at **)' +
        '\n    in Foo (at **)',
    ]);
  });
  it('warns if a tail option is used with "together"', () => {
    function Foo() {