The issue is that you have 2 classes extending the Mink shared testcase, which means that all tests coming from th shared testsuite are run twice: once in each testcase.

so your tests should either be in a testcase which does not extend the DriverTest classes from Mink (and so not ``BrowserKitDriverTest`` either as it extends the shared tests itself), or they should be defined in BrowserKitDriverTest itself