[Zope] Running zope egg-packaged product tests

Hello, I'm trying to run tests for an egg-packaged product, deployed in development mode (I'm using zope 2.10.1). I'm using the "zopectl test" command, with "--path" set to my product source directory. The problem is that the test runner seems to call the product initialize() function 2 times, resulting in duplicated profile id declarations... Is there a way to run the tests for an egg-packaged product without setting the --path option to the source dir, in order to prevent this duplication ? Thanks Seb