No test found. Make sure that installed test discoverers & executors, platform & framework version settings are appropriate and try again

Question

I am in the process of upgrading our existing solution to .Net 4.6.1 and have been unable to get our unit tests to run during a server build. Locally they run as expected an

Answer 1

In my case Reinstalling Nunit3 Adapter, Deleting temp folders, Changing architecture and nothing worked. Its because of the Daemon Resharper caused the problem.

Add or Remove Programs> Find Resharper > Repair > Install again > Restart VS 

That resolves the issues.