message: Fixed incorrect reference to 'video' object.
diff: @@ -529,7 +529,7 @@ const audio = {
  },
  };
  -module.exports = video;
  +module.exports = audio;
  ```
  Example test:
  @@ -552,10 +552,10 @@ const audio = require('./audio');
  test('plays audio', () => {
  const spy = jest.spyOn(audio, 'volume', 'set'); // we pass 'set'
  - video.volume = 100;
  + audio.volume = 100;
  expect(spy).toHaveBeenCalled();
  - expect(video.volume).toBe(100);
  + expect(audio.volume).toBe(100);
  spy.mockReset();
  spy.mockRestore();
  