I'm sure this question has been asked and answered before, but my searches are turning up nothing. According to the IDEA documentation, IDEA uses JUnit 3.8.1. I need to get the source code for this version so that I can try to troubleshoot a problem where a test of mine is throwing an exception but nothing seems to be catching it and nothing is being logged out to the console. I need to look at the runProtected method and possibly set some breakpoints to see what's happening. Can anyone assist me in finding the source code for the exact version of JUnit that IDEA is using?