How to: Edit a Test Settings File from Microsoft Visual Studio
You can change the settings that are stored in your test settings files by using the test settings editor.
To edit the test settings file
In Solution Explorer, open the shortcut menu for the .testsettings file in your solution that you want to edit and choose Open.
The Test Settings dialog box appears, allowing you to edit the file.
For more information about how to edit the fields, see Create Test Settings to Run Automated Tests from Visual Studio.