[image-animation-pseudo-animated-image-dynamic.tentative.html]
  [Changing from animated to non-animated image updates :animated-image]
    expected: FAIL

  [Changing from non-animated to animated image updates :animated-image]
    expected: FAIL

  [Setting src to empty string removes :animated-image match]
    expected: FAIL

  [Setting src from empty to animated image applies :animated-image]
    expected: FAIL

  [Changing between different animated image types maintains :animated-image]
    expected: FAIL