| Element | Missed Instructions | Cov. | Missed Branches | Cov. | Missed | Cxty | Missed | Lines | Missed | Methods |
| Total | 115 of 256 | 55% | 4 of 12 | 67% | 5 | 17 | 21 | 54 | 2 | 11 |
| sleep(ThreadContext, IRubyObject) | | 0% | | 0% | 2 | 2 | 9 | 9 | 1 | 1 |
| sleep(ThreadContext) | | 0% | n/a | 1 | 1 | 7 | 7 | 1 | 1 | |
| unlock(ThreadContext) | | 77% | | 67% | 2 | 4 | 2 | 8 | 0 | 1 |
| lock(ThreadContext) | | 75% | n/a | 0 | 1 | 3 | 10 | 0 | 1 | |
| synchronize(ThreadContext, Block) | | 68% | n/a | 0 | 1 | 0 | 3 | 0 | 1 | |
| try_lock(ThreadContext) | | 100% | | 100% | 0 | 2 | 0 | 3 | 0 | 1 |
| setup(Ruby) | | 100% | n/a | 0 | 1 | 0 | 4 | 0 | 1 | |
| newInstance(ThreadContext, IRubyObject, IRubyObject[], Block) | | 100% | n/a | 0 | 1 | 0 | 3 | 0 | 1 | |
| Mutex(Ruby, RubyClass) | | 100% | n/a | 0 | 1 | 0 | 3 | 0 | 1 | |
| checkRelocking(ThreadContext) | | 100% | | 100% | 0 | 2 | 0 | 3 | 0 | 1 |
| locked_p(ThreadContext) | | 100% | n/a | 0 | 1 | 0 | 1 | 0 | 1 |