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.
let React;
let ReactFeatureFlags;
let Fragment;
let ReactNoop;
let Scheduler;
let ReactCache;
let Suspense;
let TextResource;
let textResourceShouldFail;
describe('ReactSuspenseWithNoopRenderer', () => {
  if (!__EXPERIMENTAL__) {
    it("empty test so Jest doesn't complain", () => {});
    return;
  }
  beforeEach(() => {
    jest.resetModules();
    ReactFeatureFlags = require('shared/ReactFeatureFlags');
    ReactFeatureFlags.debugRenderPhaseSideEffectsForStrictMode = false;
    ReactFeatureFlags.replayFailedUnitOfWorkWithInvokeGuardedCallback = false;
    ReactFeatureFlags.flushSuspenseFallbacksInTests = false;
    React = require('react');