Auto respond: Unchecking the gradle preference “create separate module per source set” makes it working.

There is a good reason, why the modules are separated: It is the classpath. If you just have one module, than the test and source-classpath are shared, what is not what you want. That was a big issue in intellij until they came up with this module separation last year.

Ok, thanks for the information. But with it, I come back to my problem with the project not compiling in intellij.

If i had to choose between a maybe wrong classpath and a not compiling project I would also go with your solution 🙂