NCrunch "no tests are queued for execution"

In Visual Studio 2015 Community Edition Update 3 and with NCrunch 2.15.0.9, my MSTest unit tests do compile (I can run them in MSTest), but NCrunch shows them as

No tests are queued for execution. Monitoring 2 tests, with no tests ignored

The status of those tests is

Running (First time run), Prioritized

If they are really running, they never complete. Running them in MSTest only takes milliseconds.

The C# class library is still a very simple project, almost HelloWorld complexity. It does not have any strange dependencies.

I have set my NCrunch configuration with the wizard

• 2/4 cores for NCrunch
• max 1 background processing thread
• optimize for fastest test execution
• run my tests one at a time
• run my tests automatically when changes are detected
• let my tests run - I will ignore them as I need to

The tests don't run even if I manually trigger it.

There is no content in the NCrunch Diagnostic Output window.

Not sure if it's relevant, but I have other plugins installed:

• VisualSVN 5.1.2
• Resharper 10.0.1
• OzCode 2.0.0.1029