nunit tests throwing exception only when run as part of tfs msbuild process

Question

I\'m building and deploying a solution from Visual Studio 2015 using TFS 2012 without issues. I have decided to incorporate my unit tests as part of the prerequisites for th

Answer 1

I had the same problem on my build server when using NUnit 3 via NuGet. I uninstalled NUnit 2 and 3 test adapters from Visual Studio, and NUnit 2 from the machine. I still had the problem.

In my case the issue was caused by 4 NUnit2 DLLs hiding in :

C:\Program Files (x86)\Microsoft Visual Studio 14.0\Common7\IDE\CommonExtensions\Microsoft\TestWindow\Extensions

As soon as they were deleted the TFS build executed perfectly.