I just added xUnit to our test project (for the Asserts, we\'re still using MSTest as the framework) and immediately the test runs refused to execute any of the tests. This
In my team we had the same problem.
Your solution didn't work, but this post by Charles Sterling did help.
We used the following line:
caspol -machine -addgroup 1 -url file://\\server/share/* FullTrust -name DevShare