File
The path and file to a testable file. You can specify a dll or a Visual Studio/NUnit project file.
Fail action if any tests fail
If any tests fail the build will be stopped and marked as failed. This option isn't applied to tests that have any errors. If a test errors then the build is stopped and marked as errored regardless of this option.
Project configuration
If you've specified a Visual Studio or NUnit project then you can specify the configuration you want to test against. For example, Debug, Release, etc...
Text Fixture
If you want to test a certain fixture, enter it here. If you leave this input empty it will test every fixture.
.NET Framework
Select the .NET framework to run the tests under.