ReSharper not running new unit tests

Try cleaning the solution and delete RS related files and folders from your project folder. It has worked for me. I use VS2008 though.

It also helped me to make the unit test class public :D

Unit test methods must be public.

This test will not be recognized:

[Test]
void RunTest(){
    Assert.True;
}

Whereas this test is recognized:

[Test]
public void RunTest(){
    Assert.True;
}

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