[mask-no-interpolation.html]
  [CSS Transitions: property <mask> from [none\] to [url(mask.png)\] at (-0.3) should be [none\]]
    expected: FAIL

  [CSS Transitions: property <mask> from [none\] to [url(mask.png)\] at (0) should be [none\]]
    expected: FAIL

  [CSS Transitions: property <mask> from [none\] to [url(mask.png)\] at (0.3) should be [none\]]
    expected: FAIL