On 08/08/2016 07:10 PM, Germano Massullo wrote: I don't see the error in the log you posted. The "python-testtools" package doesn't contain a runtests module, so that's not likely to help. The problem is that the package released on PyPI doesn't include the runtests module. You could file a bug with upstream telling them they should include it. Or you can use a tarball from Github instead of the PyPI one: https://github.com/carljm/django-model-utils/releases -- Petr Viktorin