How to: Apply Test Settings from Microsoft Visual Studio
After you create or edit test settings, the details are saved to a file. You can then make one of your saved test settings active. Only one test settings can be active at a time. The active test settings is the setting that the test engine uses when it runs tests. Your choice of an active test settings is maintained from one user session to the next.
To set the active test settings
On the Test menu, click Select Active Test Settings.
A submenu lists all the test settings in your current solution or project.
Click a test settings to make it active.
This test settings will now be used when you run tests.