Why is the Visual Studio 2015/2017/2019 Test Runner not discovering my xUnit v2 tests

Answer 1

1. Close all Visual Studio instances
2. Go to %TEMP%\VisualStudioTestExplorerExtensions\
3. Delete specrun related folders
4. Try again

let me know, thanks

Answer 2

Follow this steps :

1. Update your MsTest.TestAdapter and MsTest.TestFramework dll's from nugget package manager.
2. Clean your solution
3. Build your solution.

Answer 3

This can also be due to the build check box not being ticked for the current platform project in the build configuration. Click Build | Configuration manager, then make sure the test projects have a tick in the build column for the platform that you're using (for example 'x86').

This was definitely the solution that worked for me.

Answer 4

Also check if a completely empty app.config file (completely blank with absolutely no markup) is within the test project. This was the culprit in my case.

Answer 5

I don't know if some of you also use JustMock, but I had to disable the profiler in VS 2017 for test detection to work.

Answer 6

I was suffering from this problem for long times.

• I had about 100 projects different version was deployed in different server.

• Updating xunit from 2.2.0 to 2.3.1 was not a solution because build was failing in 2.3.1.

Then I just updated xunit.runner.visualstudio to 2.3.1 and everything started to work fine. I have used this command in my package manager console to updated my xunit.runner.visualstudio package

Get-Project ComapanyName.ProjectName.*.Tests | Install-Package xunit.runner.visualstudio -Version 2.3.1