[pseudo-elements-after-part.html]
  ["::part(mypart)::grammar-error" should be a valid selector]
    expected: FAIL

  ["::part(mypart)::search-text" should be a valid selector]
    expected: FAIL

  ["::part(mypart)::spelling-error" should be a valid selector]
    expected: FAIL

  [computed style for ::part()::grammar-error]
    expected: FAIL

  [computed style for ::part()::search-text]
    expected: FAIL

  [computed style for ::part()::spelling-error]
    expected: FAIL