[KeyframeEffect-getKeyframes.tentative.html]
  [KeyframeEffect.getKeyframes() returns expected frames for a simple transition]
    expected: FAIL

  [KeyframeEffect.getKeyframes() returns expected frames for a transition with a CSS variable endpoint]
    expected: FAIL

  [KeyframeEffect.getKeyframes() returns frames unaffected by a non-default easing function]
    expected: FAIL

