Rafał Nowicki - BDD: You’re doing it wrong! Talk about mistakes we made and best practises we have elaborated while implementation Behave Driven Development into one of the projects. Great idea to coverage whole application with functional tests fall down in development chaos and reborn on new better foundations. Project referred is web-based big data management which main features are transcoding and file sharing. Thanks to Django and many Python frameworks we have web interface for it and we are able to run automation tests with Selenium.