In this page of ReSharper options, you can adjust unit testing settings related to MSTest tests.
|Enable MSTest support||Enables or disables support of MSTest tests in ReSharper test runner.|
|Select Test Run Configuration||
For more information on MSTest test settings, see MSDN. Specifying Test Settings for Visual Studio Tests
ReSharper's settings are saved in settings layers that enable you to have different settings for different solutions as well as to share your settings with your team. To learn more, study the Managing and Sharing Options section.