This issue is resolved in the latest ReSharper release, version 8.2.0.2160, download here. The issue appears when using the Test Explorer to run tests in any of the frameworks mentioned in the title. The tests are shown in the Test Explorer, but are not executed. It may look like this: Note: The tests shown dimmed are NUnit and XUnit tests, which have the issue. The other tests are MSTests, which are not affected. The tests are discovered by the adapter, but not executed. If you look in the Output ......