In the current user permission tests we include at least one test that attempts to modify a super user's `is_superuser` flag. This is supposed to fail, that's what we're verifying. But, if its run on a version where this bug still exists, then it would leave the test instance's admin user without their appropriate super user flag and need repaired or reset.

To fix this, change the test to create a new superuser just for this test to use.