I have a problem where sometimes four tests that mock a static method pass, sometimes they don't when running in NCrunch. Other tests use the same mock in the exact same way and they pass every time.

Specifics on what's happening:
- We have an Assert setup on a static class/method to verify the mock runs only once per test. I see that the first failure, the count is 2. The second is 3. And so on through each of these tests. Other places this mock is called the tests pass. There is nothing different in how the mock is setup between failing and passing tests.

If I Resyncronise NCrunch then run all the tests, these four specific tests fail. If I rerun all the tests without resyncronizing, the tests pass. If I run each of the four tests individually or as a selected group, they pass every time.

NCrunch version 3.14.0.1 in Visual Studio 2017
JustMock (free version) 2016.1.107.7
NUnit 2.6.4

I realize these are old versions of JustMock and NUnit and we're discussing moving to the current version. But other test runners work every time.

Thanks, Remco

We worked some more with this and I think it's an issue with the singleton not being thread safe. We've adjusted the setup of the mock in the test so it happens per test. This solved the issue. We'll be looking at the singleton code next.