I have some tests that use the built in Microsoft.VisualStudio.TestTools.UnitTesting, but can not get them to run.
Microsoft.VisualStudio.TestTools.UnitTesting
I am using visual studio 2012 ultimat
From menu bar on top...
Test -> Run -> All Tests
You may also view all tests from Test Explorer (Test -> Windows -> Test Explorer)
Further with VS 2012, if you miss out anything try searching it using Quick Launch bar on top right (Ctrl + Q) "Test"
Hope this helps.