[box-shadow-spread-computed.html]
  [Property box-shadow-spread value '0']
    expected: FAIL

  [Property box-shadow-spread value '1px']
    expected: FAIL

  [Property box-shadow-spread value '1em']
    expected: FAIL

  [Property box-shadow-spread value '-1px']
    expected: FAIL

  [Property box-shadow-spread value 'calc(1em + 1px)']
    expected: FAIL