I created a sample Eclipse project that demonstrates that Infinitest skips setup methods annotated with Before{Method,Class}, see https://github.com/jaeckel/InfinitestSampleProject. Because of this my tests fail when Infinitest executes them although they work when executed by Eclipse's TestNG plugin. The behaviour can be reproduced by this test case.
Is this a bug? If yes, how can it be fixed? I had a quick look at the infinitest source but that did not reveal anything yet on how to fix it. I created an issue for this and talked to the owner of the project. But so far, no one came back to me.