| Element | Missed Instructions | Cov. | Missed Branches | Cov. | Missed | Cxty | Missed | Lines | Missed | Methods |
| Total | 91 of 108 | 16% | 6 of 6 | 0% | 7 | 8 | 20 | 25 | 4 | 5 |
| FileDescriptorIO(Ruby, IRubyObject) | | 0% | | 0% | 4 | 4 | 15 | 15 | 1 | 1 |
| FileDescriptorIO(Ruby, RubyClass) | | 0% | n/a | 1 | 1 | 3 | 3 | 1 | 1 | |
| newInstance(ThreadContext, IRubyObject, IRubyObject) | | 0% | n/a | 1 | 1 | 1 | 1 | 1 | 1 | |
| wrap(ThreadContext, IRubyObject, IRubyObject) | | 0% | n/a | 1 | 1 | 1 | 1 | 1 | 1 | |
| createFileDescriptorIOClass(Ruby, RubyModule) | | 100% | n/a | 0 | 1 | 0 | 5 | 0 | 1 |