Compatibility with specs2 specs

Environment:
  OSX: 10.8.5
  Intellij Idea Ultimate: 13.1.4
  Scala plugin: 0.41.2
  Scala-library: 2.10.4
  Specs2 version: 2.4.1

Two problems:
If I use org.specs2.mutable.Specification Intellij can't find any tests. When I tried at home using the community edition Intellij seemed to pick up the classes extending Specification as tests. At work I have to extend SpecificationWithJunit.
If I use steps in tests Intellij seems to think that they never finish.

Any ideas how to fix these problems?