[cssKeywordValue.tentative.html]
  [CSSKeywordValue constructed from IDL serializes correctly]
    expected: FAIL

  [CSSKeywordValue constructed from IDL serializes to escaped strings]
    expected: FAIL

  [CSSKeywordValue from DOMString modified through "value" setter serializes correctly]
    expected: FAIL

  [CSSKeywordValue from CSSOM modified through "value" setter serializes correctly]
    expected: FAIL