[reverse-animation.html]
  [Reversing an animation when playbackRate < 0 and currentTime < 0 should make it play from the start]
    expected: FAIL

  [Reversing an animation when playbackRate > 0 and currentTime > effect end should make it play from the end]
    expected: FAIL

  [Reversing an animation inverts the playback rate]
    expected: FAIL

  [Reversing an animation does not cause it to resolve the ready promise]
    expected: FAIL

  [Reversing an animation without an active timeline throws an InvalidStateError]
    expected: FAIL

  [Reversing an animation when playbackRate > 0 and currentTime < 0 should make it play from the end]
    expected: FAIL

  [Reversing an animation plays a pausing animation]
    expected: FAIL

  [Reversing an animation does not cause it to leave the pending state]
    expected: FAIL

  [Reversing an animation maintains the same current time]
    expected: FAIL

  [Reversing should use the negative pending playback rate]
    expected: FAIL

  [Reversing an idle animation from starts playing the animation]
    expected: FAIL

  [Reversing when when playbackRate == 0 should preserve the current time and playback rate]
    expected: FAIL

  [Reversing an animation when playbackRate < 0 and currentTime > effect end should make it play from the start]
    expected: FAIL