Comment 1 for bug 344323

Here we go!

[1]
- # Mock registration-failed call
+ # Mock registration-failed call. why? I don't know.
         reactor_mock = self.mocker.patch(self.reactor)
         reactor_mock.fire("registration-failed")
         self.mocker.replay()

You created a docstring, so I suppose you know now?

The rest is great, +1.