diff --git a/tests/modeltests/model_formsets/tests.py b/tests/modeltests/model_formsets/tests.py
index a45b44375f..d343fc7296 100644
--- a/tests/modeltests/model_formsets/tests.py
+++ b/tests/modeltests/model_formsets/tests.py
@@ -15,7 +15,7 @@ class DeletionTests(TestCase):
         }
         formset = PoetFormSet(data, queryset=Poet.objects.all())
         formset.save()
-        self.assertTrue(formset.is_valid())
+        self.failUnless(formset.is_valid())
         self.assertEqual(Poet.objects.count(), 0)
 
     def test_add_form_deletion_when_invalid(self):
diff --git a/tests/regressiontests/inline_formsets/tests.py b/tests/regressiontests/inline_formsets/tests.py
index f1527ac3c3..1d9a730479 100644
--- a/tests/regressiontests/inline_formsets/tests.py
+++ b/tests/regressiontests/inline_formsets/tests.py
@@ -17,7 +17,7 @@ class DeletionTests(TestCase):
         }
         formset = PoemFormSet(data, instance=poet)
         formset.save()
-        self.assertTrue(formset.is_valid())
+        self.failUnless(formset.is_valid())
         self.assertEqual(Poem.objects.count(), 0)
 
     def test_add_form_deletion_when_invalid(self):