Eclipse JUnit - possible causes of seeing “initializationError” in Eclipse window

Question

I know this question is pretty general but I haven\'t found any hints on why this error may show up. What are possible causes of seeing initalizationError in Eclips

Answer 1

I got another failure trace, but for future visitors using their favorite search engine:

For me the problem was that eclipse somehow decided to execute only a single method in my test class (I couldn't figure out why, though). Especially if you did not change anything in your setup, check your run configuration.