[cssUnparsedValue.html]
  [CSSUnparsedValue containing strings serializes to its tokenized contents]
    expected: FAIL

  [CSSUnparsedValue containing variable references serializes its tokenized contents]
    expected: FAIL

  [CSSUnparsedValue containing mix of strings and variable references serializes to its tokenized contents]
    expected: FAIL

  [attributeStyleMap round-trips correctly, though the comment is gone]
    expected: FAIL