diff --git a/tests/regressiontests/generic_views/dates.py b/tests/regressiontests/generic_views/dates.py
index f3984c6c0e..eb1f7d0a95 100644
--- a/tests/regressiontests/generic_views/dates.py
+++ b/tests/regressiontests/generic_views/dates.py
@@ -456,15 +456,17 @@ class DayArchiveViewTests(TestCase):
 
     @override_settings(USE_TZ=True, TIME_ZONE='Africa/Nairobi')
     def test_aware_datetime_day_view(self):
-        BookSigning.objects.create(event_date=datetime.datetime(2008, 4, 2, 12, 0, tzinfo=timezone.utc))
+        bs = BookSigning.objects.create(event_date=datetime.datetime(2008, 4, 2, 12, 0, tzinfo=timezone.utc))
         res = self.client.get('/dates/booksignings/2008/apr/2/')
         self.assertEqual(res.status_code, 200)
         # 2008-04-02T00:00:00+03:00 (beginning of day) > 2008-04-01T22:00:00+00:00 (book signing event date)
-        BookSigning.objects.filter(pk=1).update(event_date=datetime.datetime(2008, 4, 1, 22, 0, tzinfo=timezone.utc))
+        bs.event_date = datetime.datetime(2008, 4, 1, 22, 0, tzinfo=timezone.utc)
+        bs.save()
         res = self.client.get('/dates/booksignings/2008/apr/2/')
         self.assertEqual(res.status_code, 200)
         # 2008-04-03T00:00:00+03:00 (end of day) > 2008-04-02T22:00:00+00:00 (book signing event date)
-        BookSigning.objects.filter(pk=1).update(event_date=datetime.datetime(2008, 4, 2, 22, 0, tzinfo=timezone.utc))
+        bs.event_date = datetime.datetime(2008, 4, 2, 22, 0, tzinfo=timezone.utc)
+        bs.save()
         res = self.client.get('/dates/booksignings/2008/apr/2/')
         self.assertEqual(res.status_code, 404)
 
@@ -524,20 +526,22 @@ class DateDetailViewTests(TestCase):
         self.assertEqual(res.status_code, 404)
 
     def test_datetime_date_detail(self):
-        BookSigning.objects.create(event_date=datetime.datetime(2008, 4, 2, 12, 0))
-        res = self.client.get('/dates/booksignings/2008/apr/2/1/')
+        bs = BookSigning.objects.create(event_date=datetime.datetime(2008, 4, 2, 12, 0))
+        res = self.client.get('/dates/booksignings/2008/apr/2/%d/' % bs.pk)
         self.assertEqual(res.status_code, 200)
 
     @override_settings(USE_TZ=True, TIME_ZONE='Africa/Nairobi')
     def test_aware_datetime_date_detail(self):
-        BookSigning.objects.create(event_date=datetime.datetime(2008, 4, 2, 12, 0, tzinfo=timezone.utc))
-        res = self.client.get('/dates/booksignings/2008/apr/2/1/')
+        bs = BookSigning.objects.create(event_date=datetime.datetime(2008, 4, 2, 12, 0, tzinfo=timezone.utc))
+        res = self.client.get('/dates/booksignings/2008/apr/2/%d/' % bs.pk)
         self.assertEqual(res.status_code, 200)
         # 2008-04-02T00:00:00+03:00 (beginning of day) > 2008-04-01T22:00:00+00:00 (book signing event date)
-        BookSigning.objects.filter(pk=1).update(event_date=datetime.datetime(2008, 4, 1, 22, 0, tzinfo=timezone.utc))
-        res = self.client.get('/dates/booksignings/2008/apr/2/1/')
+        bs.event_date = datetime.datetime(2008, 4, 1, 22, 0, tzinfo=timezone.utc)
+        bs.save()
+        res = self.client.get('/dates/booksignings/2008/apr/2/%d/' % bs.pk)
         self.assertEqual(res.status_code, 200)
         # 2008-04-03T00:00:00+03:00 (end of day) > 2008-04-02T22:00:00+00:00 (book signing event date)
-        BookSigning.objects.filter(pk=1).update(event_date=datetime.datetime(2008, 4, 2, 22, 0, tzinfo=timezone.utc))
-        res = self.client.get('/dates/booksignings/2008/apr/2/1/')
+        bs.event_date = datetime.datetime(2008, 4, 2, 22, 0, tzinfo=timezone.utc)
+        bs.save()
+        res = self.client.get('/dates/booksignings/2008/apr/2/%d/' % bs.pk)
         self.assertEqual(res.status_code, 404)