| PASS prepend on ParentNode must enqueue a connected reaction | |
| PASS prepend on ParentNode must enqueue a disconnected reaction, an adopted reaction, and a connected reaction when the custom element was in another document | |
| PASS append on ParentNode must enqueue a connected reaction | |
| PASS append on ParentNode must enqueue a disconnected reaction, an adopted reaction, and a connected reaction when the custom element was in another document | |