Visual Studio 2013 doesn't discover unit tests

Question

I have a simple solution in visual studio 2013 that is composed by one web project, one library project and one unit test project. When I open the solution and try to run th

Answer 1

I had the exact same problem.

It was due to incompatible version of NUnit I'd added to my project (3.2.0) and the Test Adapter I had installed (2.0.0).

To fix, use "Tools > Extensions and Updates" and search for NUnit3 Test Adapter, it discovered my tests after that.

Cheers