JExample is a small framework to write unit tests that build upon each other. As such, JExample diverges from common reading of the isolation guideline of unit testing, which stats that tests should be be separate and apart from the application and all other units. Since its first formulation on the C2 wiki, common understanding of the isolation reading has been extended to concern not only the isolation of units under test but also the isolation of test cases. While we agree to the basic permise of Test-driven Development, that isolating the units under test leads to better design of both application and test code, we dare to disagree regarding the isolation of test cases: on the contrary, it is our conviction that well-designed test cases should build upon each other! archive 