Actually, the [AbstractPackageSanityTests](https://code.google.com/p/guava-libraries/source/browse/guava-testlib/src/com/google/common/testing/AbstractPackageSanityTests.java?r=a3df035531ff51546466335635e72500a7a95348) class runs automatic tests on public classes in the package. The Timer and Counter code is just some code for making it work with those classes. You should probably just remove the overridden setUp method but keep the class.