[preferences-reducedTransparency.tentative.https.html]
  expected: ERROR
  [navigator.preferences.reducedTransparency supported]
    expected: FAIL

  [navigator.preferences.reducedTransparency.override supported]
    expected: FAIL

  [navigator.preferences.reducedTransparency.value supported]
    expected: FAIL

  [navigator.preferences.reducedTransparency.validValues supported]
    expected: FAIL

  [navigator.preferences.reducedTransparency.requestOverride() with invalid value throws]
    expected: NOTRUN

  [navigator.preferences.reducedTransparency.clearOverride() supported]
    expected: NOTRUN

  [navigator.preferences.reducedTransparency.requestOverride(null) works like clearOverride()]
    expected: NOTRUN

  [navigator.preferences.reducedTransparency.requestOverride('') works like clearOverride()]
    expected: NOTRUN

  [navigator.preferences.reducedTransparency.requestOverride() updates (prefers-reduced-transparency)]
    expected: NOTRUN

  [navigator.preferences.reducedTransparency fires change event when requesting override]
    expected: FAIL

  [navigator.preferences.reducedTransparency fires change event when requesting override (without value change)]
    expected: NOTRUN

  [navigator.preferences.reducedTransparency fires change event when clearing override]
    expected: NOTRUN

  [navigator.preferences.reducedTransparency fires change event when clearing override (without value change)]
    expected: NOTRUN