[clamp-length-computed.html]
  [Property letter-spacing value 'clamp(none, 30px, 33px)']
    expected: FAIL

  [Property letter-spacing value 'clamp(none, 33px, 30px)']
    expected: FAIL

  [Property letter-spacing value 'clamp(30px, 33px, none)']
    expected: FAIL

  [Property letter-spacing value 'clamp(33px, 30px, none)']
    expected: FAIL

  [Property letter-spacing value 'clamp(none, 30px, none)']
    expected: FAIL

  [Property letter-spacing value 'clamp(1000px, 1em / 1rem * 1px, none)']
    expected: FAIL

  [Property letter-spacing value 'clamp(1600px / 1em * 1px, 1em / 1rem * 1px, none)']
    expected: FAIL