MSTest run fails because source assembly is not trusted

Question

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

Answer 1

I had the same problem with moq. But would not 'unblock'. Every time I unblocked it, it was still blocked!?!?

I had to unblock the original zip file I downloaded. Then copy the DLL from the zip file again. It work after that.