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

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

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

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

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

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

  ["::part(mypart)::highlight(myhighlight)" should be a valid selector]
    expected: FAIL

  ["::part(mypart)::placeholder" 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

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

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

  ["::part(mypart)::view-transition-group(*)" should be a valid selector]
    expected: FAIL

  ["::part(mypart)::view-transition-image-pair(*)" should be a valid selector]
    expected: FAIL

  ["::part(mypart)::view-transition-new(*)" should be a valid selector]
    expected: FAIL

  ["::part(mypart)::view-transition-old(*)" should be a valid selector]
    expected: FAIL

  [computed style for ::part()::after]
    expected: FAIL

  [computed style for ::part()::backdrop]
    expected: FAIL

  [computed style for ::part()::before]
    expected: FAIL

  [computed style for ::part()::details-content]
    expected: FAIL

  [computed style for ::part()::file-selector-button]
    expected: FAIL

  [computed style for ::part()::first-letter]
    expected: FAIL

  [computed style for ::part()::first-line]
    expected: FAIL

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

  [computed style for ::part()::highlight(myhighlight)]
    expected: FAIL

  [computed style for ::part()::placeholder]
    expected: FAIL

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

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

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

  [::part styles with ::part(mypart)::details-content {\n                  height: 371px;\n                } and <details part='mypart'><summary style="height:47px">summary</summary>details</details>]
    expected: FAIL

  [::part styles with ::part(mypart)::file-selector-button {\n                  height: 94px;\n                  padding: 0;\n                  margin: 0;\n                  border: none;\n                  appearance: none;\n                } and <input type=file part=mypart>]
    expected: FAIL

  [::part styles with ::part(mypart) {\n                  font: 20px/1 Ahem;\n                }\n                ::part(mypart)::first-letter {\n                  font-size: 86px;\n                } and <div part=mypart>X<br>X</div>]
    expected: FAIL

  [::part styles with ::part(mypart) {\n                  font: 20px/1 Ahem;\n                }\n                ::part(mypart)::first-line {\n                  font-size: 86px;\n                } and <div part=mypart>X<br>X</div>]
    expected: FAIL