| Element | Missed Instructions | Cov. | Missed Branches | Cov. | Missed | Cxty | Missed | Lines | Missed | Methods |
| Total | 51 of 95 | 46% | 3 of 4 | 25% | 5 | 10 | 10 | 21 | 3 | 8 |
| newRefError(String) | | 0% | n/a | 1 | 1 | 7 | 7 | 1 | 1 | |
| weakref_alive_p() | | 0% | | 0% | 2 | 2 | 1 | 1 | 1 | 1 |
| getobj() | | 69% | | 50% | 1 | 2 | 1 | 4 | 0 | 1 |
| setobj(IRubyObject) | | 0% | n/a | 1 | 1 | 1 | 1 | 1 | 1 | |
| newInstance(IRubyObject, IRubyObject) | | 100% | n/a | 0 | 1 | 0 | 3 | 0 | 1 | |
| initialize(ThreadContext, IRubyObject) | | 100% | n/a | 0 | 1 | 0 | 2 | 0 | 1 | |
| WeakRef(Ruby, RubyClass) | | 100% | n/a | 0 | 1 | 0 | 2 | 0 | 1 | |
| static {...} | | 100% | n/a | 0 | 1 | 0 | 1 | 0 | 1 |