[checkable.html]
  [menuitem is not checkable on its own]
    expected: FAIL

  [menuitem in menubar is not checkable]
    expected: FAIL

  [menuitem in menulist]
    expected: FAIL

  [checkable menuitem exclusivity]
    expected: FAIL

  [checkable multiple]
    expected: FAIL

  [checkable menuitem exclusivity when disconnected]
    expected: FAIL

  [when fieldset becomes uncheckable, so do its menuitems]
    expected: FAIL

  [fieldset multiple => single; all but the first checked menuitem gets reset]
    expected: FAIL