One very annoying issue I had after upgrading from Visual Studio 2010 Beta 2 to the RC, that the ‘Run Tests in Current Context’ options runs all tests in my solution. As I’m having a lot of tests, I needed a solution.
It turns out that this is caused by a change that was made in Visual Studio 2010 RC to the way Test Settings files are stored. In this blog post, they describe that you can fix the issue by opening each Test Settings file (*.testsettings) contained in your solution, making a trivial change, and saving it.