After installing Visual Studio 2012 Update 2, the unit test runner in ReSharper fails to run tests – all unit tests display “pending” status and never complete.
This is a known issue with current versions of ReSharper (7.1.2 and 8.0).
Grab the latest “private” 7.1.3 build from the links above, install, and carry on with your unit testing.
There seems to be some issues with the private build, at least according to random comments in the issue tracker. I haven’t found any problems, but contents may be hot etc.