Hi,

v3.9 of NCrunch changed the xunit integration, so instead of packaging xunit runtime assemblies (namely xunit.execution.*) with NCrunch, it now calls into xunit and lets xunit itself find these assemblies. Considering the search code and the handling of xunit.execution is inside xunit itself, it's my expectation that your current setup also won't work on any other xunit compatible test runner.

The root of the problem is that the xunit.execution DLL does not exist in the build output directory of your test project. It's quite possible that uninstalling and reinstalling the xunit nuget package will solve this problem.