[selectmenu-parts-structure.tentative.html]
  [To receive button part controller code, an element labeled as a button must not be a descendant of the listbox part in a flat tree traversal]
    expected: FAIL

  [To receive listbox part controller code, an element labeled as a listbox must not be a descendant of the button part in a flat tree traversal]
    expected: FAIL

  [Button controller code should be applied in flat tree traversal order regardless of dynamic insertion order]
    expected: FAIL

  [Listbox controller code should be applied in flat tree traversal order regardless of dynamic insertion order]
    expected: FAIL

  [selected-value controller code should be applied in flat tree traversal order regardless of dynamic insertion order]
    expected: FAIL

  [Ensure that option controller code is updated when listbox changes]
    expected: FAIL

  [Ensure that controller code is applied after updating the slot attribute]
    expected: FAIL

  [Ensure that controller code is applied when slot and part attributes are different]
    expected: FAIL

  [HTMLOptionElements (and not other element types) should receive option controller code]
    expected: FAIL

  [To receive option part controller code, an option must be a descendant of the listbox part in a flat tree traversal]
    expected: FAIL

  [Ensure that controller code is synchronously applied]
    expected: FAIL

  [Controller code should be updated when nested parts are removed]
    expected: FAIL

  [Moving a selectmenu between documents should keep controller code active]
    expected: FAIL
