1 files changed, 26 insertions, 14 deletions
diff --git a/tests/db_functions/comparison/test_nullif.py b/tests/db_functions/comparison/test_nullif.py
index 36f881ed57..a65885a3ec 100644
--- a/tests/db_functions/comparison/test_nullif.py
+++ b/tests/db_functions/comparison/test_nullif.py
@@ -9,32 +9,44 @@ from ..models import Author
 
 
 class NullIfTests(TestCase):
-
     @classmethod
     def setUpTestData(cls):
-        Author.objects.create(name='John Smith', alias='smithj')
-        Author.objects.create(name='Rhonda', alias='Rhonda')
+        Author.objects.create(name="John Smith", alias="smithj")
+        Author.objects.create(name="Rhonda", alias="Rhonda")
 
     def test_basic(self):
-        authors = Author.objects.annotate(nullif=NullIf('alias', 'name')).values_list('nullif')
+        authors = Author.objects.annotate(nullif=NullIf("alias", "name")).values_list(
+            "nullif"
+        )
         self.assertSequenceEqual(
-            authors, [
-                ('smithj',),
-                ('' if connection.features.interprets_empty_strings_as_nulls else None,)
-            ]
+            authors,
+            [
+                ("smithj",),
+                (
+                    ""
+                    if connection.features.interprets_empty_strings_as_nulls
+                    else None,
+                ),
+            ],
         )
 
     def test_null_argument(self):
-        authors = Author.objects.annotate(nullif=NullIf('name', Value(None))).values_list('nullif')
-        self.assertSequenceEqual(authors, [('John Smith',), ('Rhonda',)])
+        authors = Author.objects.annotate(
+            nullif=NullIf("name", Value(None))
+        ).values_list("nullif")
+        self.assertSequenceEqual(authors, [("John Smith",), ("Rhonda",)])
 
     def test_too_few_args(self):
         msg = "'NullIf' takes exactly 2 arguments (1 given)"
         with self.assertRaisesMessage(TypeError, msg):
-            NullIf('name')
+            NullIf("name")
 
-    @skipUnless(connection.vendor == 'oracle', 'Oracle specific test for NULL-literal')
+    @skipUnless(connection.vendor == "oracle", "Oracle specific test for NULL-literal")
     def test_null_literal(self):
-        msg = 'Oracle does not allow Value(None) for expression1.'
+        msg = "Oracle does not allow Value(None) for expression1."
         with self.assertRaisesMessage(ValueError, msg):
-            list(Author.objects.annotate(nullif=NullIf(Value(None), 'name')).values_list('nullif'))
+            list(
+                Author.objects.annotate(nullif=NullIf(Value(None), "name")).values_list(
+                    "nullif"
+                )
+            )