| Element | Missed Instructions | Cov. | Missed Branches | Cov. | Missed | Cxty | Missed | Lines | Missed | Methods |
| Total | 149 of 196 | 24% | 51 of 54 | 6% | 30 | 31 | 1 | 7 | 3 | 4 |
| differenceOperationToCeylon(Tree.DifferenceOp, Callable) | | 27% | | 6% | 27 | 28 | 0 | 6 | 0 | 1 |
| differenceOperationToCeylon$update(Tree.DifferenceOp) | | 0% | n/a | 1 | 1 | 1 | 1 | 1 | 1 | |
| differenceOperationToCeylon(Tree.DifferenceOp) | | 0% | n/a | 1 | 1 | 1 | 1 | 1 | 1 | |
| differenceOperationToCeylon_() | | 0% | n/a | 1 | 1 | 0 | 0 | 1 | 1 |