1 files changed, 10 insertions, 10 deletions
diff --git a/tests/db_functions/window/test_validation.py b/tests/db_functions/window/test_validation.py
index 2efc88fdfa..43adde442d 100644
--- a/tests/db_functions/window/test_validation.py
+++ b/tests/db_functions/window/test_validation.py
@@ -4,36 +4,36 @@ from django.test import SimpleTestCase
 
 class ValidationTests(SimpleTestCase):
     def test_nth_negative_nth_value(self):
-        msg = 'NthValue requires a positive integer as for nth'
+        msg = "NthValue requires a positive integer as for nth"
         with self.assertRaisesMessage(ValueError, msg):
-            NthValue(expression='salary', nth=-1)
+            NthValue(expression="salary", nth=-1)
 
     def test_nth_null_expression(self):
-        msg = 'NthValue requires a non-null source expression'
+        msg = "NthValue requires a non-null source expression"
         with self.assertRaisesMessage(ValueError, msg):
             NthValue(expression=None)
 
     def test_lag_negative_offset(self):
-        msg = 'Lag requires a positive integer for the offset'
+        msg = "Lag requires a positive integer for the offset"
         with self.assertRaisesMessage(ValueError, msg):
-            Lag(expression='salary', offset=-1)
+            Lag(expression="salary", offset=-1)
 
     def test_lead_negative_offset(self):
-        msg = 'Lead requires a positive integer for the offset'
+        msg = "Lead requires a positive integer for the offset"
         with self.assertRaisesMessage(ValueError, msg):
-            Lead(expression='salary', offset=-1)
+            Lead(expression="salary", offset=-1)
 
     def test_null_source_lead(self):
-        msg = 'Lead requires a non-null source expression'
+        msg = "Lead requires a non-null source expression"
         with self.assertRaisesMessage(ValueError, msg):
             Lead(expression=None)
 
     def test_null_source_lag(self):
-        msg = 'Lag requires a non-null source expression'
+        msg = "Lag requires a non-null source expression"
         with self.assertRaisesMessage(ValueError, msg):
             Lag(expression=None)
 
     def test_negative_num_buckets_ntile(self):
-        msg = 'num_buckets must be greater than 0'
+        msg = "num_buckets must be greater than 0"
         with self.assertRaisesMessage(ValueError, msg):
             Ntile(num_buckets=-1)