def get_edit_url(self, project_slug=''):
        return reverse(
            self.url_name, args=(project_slug or self.project.slug,)
        )
self.url points to using the view for creating a new project. Use
dataset/ETHPy150Open python/raspberryio/raspberryio/project/tests/test_views.py/ProjectCreateEditTestCase.get_edit_url