I have the following django test case that is giving me errors:

class MyTesting(unittest.TestCase):
    def setUp(self):
        self.u1 = User.objects.create(username='user1')
        self.up1 = UserProfile.objects.create(user=self.u1)

    def testA(self):
        ...

    def testB(self):
        ...

When I run my tests, testA will pass sucessfully but before testB starts, I get the following error:

IntegrityError: column username is not unique

It's clear that it is trying to create self.u1 before each test case and finding that it already exists in the Database. How do I get it to properly clean up after each test case so that subsequent cases run correctly?