In one of our build definitions, I'm trying to configure the Visual Studio Test build step to run a specific set of tests.
There is a test filter criteria field (see below), but this does not seem to have any effect, regardless of all tests. This is not like the search filter field in Test Explorer in VS2015, and there are some links to “TestCaseFilter”, but this is not applicable here (and maybe only TFS2012).

Can this be used to actually filter the tests, or should I do it differently (for example, provide a settings file?)
FWIW we use Xunit for our unit tests.
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