Cucumber is quite a cool tool to build a test suite. Maybe you know the situation: You are the developer of some ruby library and support JRUBY and MRI-Ruby on Windows and Linux. You might have gotten into a pretty pickle adding a new feature whose tests only fails if you run them with JRuby. If the reason for this failure is a bug in the platform, you may need to work around this bug. This article describes a technique, how you can do that with cucumber.