| PASS | subject1 Initial color | |
| PASS | #subject1 invalidated after adding first sibling | |
| PASS | #subject1 invalidated after removing first sibling | |
| PASS | subject2 Initial color | |
| PASS | #subject2 invalidated after adding first sibling | |
| PASS | #subject2 invalidated after removing first sibling | |
| PASS | subject3 Initial color | |
| PASS | #subject3 invalidated after adding first sibling | |
| PASS | #subject3 invalidated after removing first sibling | |
| PASS | subject4 Initial color | |
| PASS | #subject4 invalidated after adding first sibling | |
| PASS | #subject4 invalidated after removing first sibling | |