[animate.html]
  [animate() with pseudoElement parameter creates an Animation object for ::first-line]
    bug: https://bugzilla.mozilla.org/show_bug.cgi?id=1615469
    expected: FAIL

  [animate() with pseudoElement an Animation object targeting the correct pseudo-element for ::first-line]
    bug: https://bugzilla.mozilla.org/show_bug.cgi?id=1615469
    expected: FAIL

  [Element.animate() correctly sets the Animation's timeline with null timeline in KeyframeAnimationOptions.]
    expected: FAIL

  [animate() with pseudoElement ::placeholder does not throw]
    expected: FAIL

  [Element.animate() accepts a single keyframe sequence with a single calc() offset]
    expected: FAIL

  [Element.animate() accepts a single keyframe sequence with a complex calc() offset]
    expected: FAIL