[ParentNode.html]
  type: testharness
  [prepend on ParentNode must enqueue a connected reaction]
    expected: FAIL

  [prepend on ParentNode must enqueue a disconnected reaction, an adopted reaction, and a connected reaction when the custom element was in another document]
    expected: FAIL

  [append on ParentNode must enqueue a connected reaction]
    expected: FAIL

  [append on ParentNode must enqueue a disconnected reaction, an adopted reaction, and a connected reaction when the custom element was in another document]
    expected: FAIL