diff --git a/tests/test_throttling.py b/tests/test_throttling.py
index 456467e5d..00b31ad7e 100644
--- a/tests/test_throttling.py
+++ b/tests/test_throttling.py
@@ -424,6 +424,9 @@ class AnonRateThrottleTests(TestCase):
     def setUp(self):
         self.throttle = AnonRateThrottle()
 
+    def tearDown(self):
+        User.objects.all().delete()
+
     def test_authenticated_user_not_affected(self):
         request = Request(HttpRequest())
         user = User.objects.create(username='test')
@@ -435,3 +438,20 @@ class AnonRateThrottleTests(TestCase):
         request = Request(HttpRequest())
         cache_key = self.throttle.get_cache_key(request, view={})
         assert cache_key == 'throttle_anon_None'
+
+
+class UserRateThrottleTests(TestCase):
+
+    def setUp(self):
+        self.throttle = UserRateThrottle()
+
+    def tearDown(self):
+        User.objects.all().delete()
+
+    def test_get_cache_key_returns_correct_key_if_user_is_authenticated(self):
+        request = Request(HttpRequest())
+        user = User.objects.create(username='test')
+        force_authenticate(request, user)
+        request.user = user
+        cache_key = self.throttle.get_cache_key(request, view={})
+        assert cache_key == 'throttle_user_2'  # user_1 is AnonymousUser