[context-attributes-alpha-depth-stencil-antialias.html]
  bug: https://github.com/servo/servo/issues/21285
  [WebGL test #124]
    expected: FAIL

  [WebGL test #190]
    expected: FAIL

  [WebGL test #254]
    expected: FAIL

  [WebGL test #322]
    expected: FAIL

  [WebGL test #388]
    expected: FAIL

  [WebGL test #454]
    expected: FAIL

  [WebGL test #518]
    expected: FAIL

  [WebGL test #58]
    expected: FAIL