[prefers-reduced-transparency.html]
  [Should be known: '(prefers-reduced-transparency)']
    expected: FAIL

  [Should be known: '(prefers-reduced-transparency: no-preference)']
    expected: FAIL

  [Should be known: '(prefers-reduced-transparency: reduce)']
    expected: FAIL

  [Check that no-preference evaluates to false in the boolean context]
    expected: FAIL