* As an admin, go to `/people/manage/123/` and select `Change Username`. Use the old username as the new username and select `Rename User`. Without the patch, get an exception. With the patch, get a proper error message within the dialog, as if you tried to set the new username to an empty string.
* As an admin, go to `/people/create/`, select `Create Standard User`, and successfully create a new user account.
* In an anonymous browser window, go to `/auth/start/`, click `Register New Account`, and successfully create a new user account.