[animate.html]
  type: testharness
  [Element.animate() creates an Animation object with a KeyframeEffect]
    expected: FAIL
    bug: https://bugzilla.mozilla.org/show_bug.cgi?id=1211783

  [Element.animate() accepts a single-valued keyframe specification]
    expected: FAIL
    bug: https://bugzilla.mozilla.org/show_bug.cgi?id=1216844

