| Element | Missed Instructions | Cov. | Missed Branches | Cov. | Missed | Cxty | Missed | Lines | Missed | Methods |
| Total | 88 of 252 | 65% | 17 of 40 | 57% | 14 | 28 | 18 | 63 | 0 | 6 |
| write(char[], int, int) | | 48% | | 50% | 7 | 11 | 13 | 26 | 0 | 1 |
| writeCodePoint(int) | | 69% | | 66% | 4 | 9 | 4 | 19 | 0 | 1 |
| flush() | | 72% | | 50% | 3 | 4 | 1 | 5 | 0 | 1 |
| Utf8StreamWriter(OutputStream, boolean) | | 100% | n/a | 0 | 1 | 0 | 6 | 0 | 1 | |
| close() | | 100% | | 100% | 0 | 2 | 0 | 5 | 0 | 1 |
| Utf8StreamWriter(OutputStream) | | 100% | n/a | 0 | 1 | 0 | 2 | 0 | 1 |