| PASS | Initially red | |
| PASS | sibling selector enclosed by :is() no longer matching after removal (1) | |
| PASS | sibling selector enclosed by :is() no longer matching after removal (2) | |
| PASS | sibling selector enclosed by :is() no longer matching after removal (3) | |
| PASS | sibling selector enclosed by :is() no longer matching after removal (4) | |
| PASS | sibling selector in non-subject enclosed by :is() no longer matching after removal (1) | |
| PASS | sibling selector in non-subject enclosed by :is() no longer matching after removal (2) | |
| PASS | sibling selector in non-subject enclosed by :is() no longer matching after removal (3) | |
| PASS | sibling selector in non-subject enclosed by :is() no longer matching after removal (4) | |
| PASS | sibling selector in non-subject enclosed by :is() no longer matching after removal (5) | |
| PASS | :nth-child() enclosed by :is() no longer matching after removal (1) | |
| PASS | :nth-child() enclosed by :is() no longer matching after removal (2) | |
| PASS | :nth-last-child() enclosed by :is() no longer matching after removal (1) | |
| PASS | :nth-last-child() enclosed by :is() no longer matching after removal (2) | |
| PASS | :nth-child() in non-subject enclosed by :is() no longer matching after removal (1) | |
| PASS | :nth-child() in non-subject enclosed by :is() no longer matching after removal (2) | |
| PASS | :nth-last-child() in non-subject enclosed by :is() no longer matching after removal (1) | |
| PASS | :nth-last-child() in non-subject enclosed by :is() no longer matching after removal (2) | |
| PASS | sibling selector in parent selector enclosed by :is() no longer matching after removal | |
| PASS | sibling selector in parent selector non-subject position enclosed by :is() no longer matching after removal (1) | |
| PASS | sibling selector in parent selector non-subject position enclosed by :is() no longer matching after removal (2) | |