Fixed #24223 -- Prevented a session test from leaking.

        self.assertNotEqual(caches['sessions'].get(self.session.cache_key), None)

class SessionMiddlewareTests(unittest.TestCase):

class SessionMiddlewareTests(TestCase):

    @override_settings(SESSION_COOKIE_SECURE=True)

    def test_secure_session_cookie(self):

        )

class CookieSessionTests(SessionTestsMixin, TestCase):

# Don't need DB flushing for these tests, so can use unittest.TestCase as base class

class CookieSessionTests(SessionTestsMixin, unittest.TestCase):

    backend = CookieSession