Comment 34 for bug 1177924

Horizon is one of projects which do not use testtools for testing. This is because we use Django test framework which depends on python standard unittest. testtools support in Django is out of scope of the horizon project and replacing horizon test from Django to testtools is not productive. we mark this bug as Won't Fix.

On the other hand, Django supports several test runners. Looking at the bug description, the motivation of switching to testtools is to run tests in parallel (and use subunit for output serialization though it is not explicitly mentioned). It is better to be explored separately.