We use FxCop for all of our projects. For our UnitTests I am not sure it is worth it. We end up with many suppresses:
[SuppressMessage("Microsoft.Performance", "CA1822:MarkMembersAsStatic", Justification = SuppressJustifications.CA1822MethodIsUsedExternallyAsNonStatic)]
[SuppressMessage("Microsoft.Usage", "CA1806:DoNotIgnoreMethodResults", MessageId = "Cantaloupe.Seed.Security.RijndaelEncryption", Justification = SuppressJustifications.CA1806MethodIsCalledForExceptionThrowingTest)]
What are people's thoughts on FxCop on Unit test code?