[cssPositionValue.html]
  [CSSPositionValue with length and percent serializes by concantenating x and y]
    expected: FAIL

  [CSSPositionValue from DOMString modified by "x" setter serializes to its new value]
    expected: FAIL

  [CSSPositionValue from DOMString modified by "y" setter serializes to its new value]
    expected: FAIL

  [CSSPositionValue from CSSOM modified by "x" setter serializes to its new value]
    expected: FAIL

  [CSSPositionValue from CSSOM modified by "y" setter serializes to its new value]
    expected: FAIL

