title: Stop running tests on setup failures
body: <p>We are using NUnit to run a large number of integration tests.</p>
  
  <p>All these tests share a base class, which as a test fixture setup method that preps the data needed for the rest of the tests.</p>
  
  <p>Is there any way to stop running tests if there is a failure in the test fixture setup?</p>
  
  <p>Right now it waits until all the tests fail with the same setup error</p>