[background-position-x-computed.html]
  [Property background-position-x value 'calc(10px - 0.5em), left -20%, right 10px']
    expected: FAIL

  [Property background-position-x value 'center, left, right']
    expected: FAIL

  [Property background-position-x value '0.5em, x-start, x-end']
    expected: FAIL

  [Property background-position-x value 'x-end']
    expected: FAIL

  [Property background-position-x value 'x-start']
    expected: FAIL

  [Property background-position-x value 'calc(10px - 0.5em), -20%, 10px']
    expected: FAIL

  [Property background-position-x value '-20%, 10px']
    expected: FAIL

