I\'m having some issues today with running a simple TestKit test in Intellij. The tests are for Scala code (I have the Scala plug-in for Intellij) and are based on Ray Roes
In my case, I was missing the Scala facet in my module.
https://blog.jetbrains.com/scala/2010/09/02/project-configuration-explained/
I got rid of the error once I configured module properly.