| Element | Missed Instructions | Cov. | Missed Branches | Cov. | Missed | Cxty | Missed | Methods |
| Total | 13 of 13 | 0% | 0 of 0 | n/a | 2 | 2 | 2 | 2 |
| JZlibRubyGzipWriter.INVOKER.i.1.0.set_mtime(RubyModule, Visibility) | | 0% | n/a | 1 | 1 | 1 | 1 | |
| call(ThreadContext, IRubyObject, RubyModule, String, IRubyObject) | | 0% | n/a | 1 | 1 | 1 | 1 |