As of version 2015.3.1015 Visual Studio 2010 is not supported!
Open the Test View tool window. This can be found by clicking Test > Windows > Test View.
Right click on your test and choose Run Selection.
A browser window or WPF app will open and the steps of your test will automatically execute.
After the test run, click the link (in red above) in the Test Results area to view the execution log.