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TFS Build Test Task–How to exclude a set of tests

The Test Task in TFS Build allows you to specify which assemblies should be searched for (unit) tests.

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By using the Test Filter criteria, you can further filter the set of Tests you want to be executed:

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Based on the Tooltip you get the impression you can only specify which tests to include based on things like TestName, TestCategory, … But under the hood there is a lot more possible. You can not only include tests(using ‘=’), but also exclude tests(using ‘!=’), execute a contains check (using ‘~’) and group subexpressions (using ‘( <subexpression>)’).

Here is a short sample where I exclude all PerformanceTests, include tests with Priority 1 and where the name contains the word ‘UnitTest’:

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