1 files changed, 17 insertions, 9 deletions
diff --git a/tests/db_functions/text/test_left.py b/tests/db_functions/text/test_left.py
index 873bbf859b..8871f9ac79 100644
--- a/tests/db_functions/text/test_left.py
+++ b/tests/db_functions/text/test_left.py
@@ -8,20 +8,28 @@ from ..models import Author
 class LeftTests(TestCase):
     @classmethod
     def setUpTestData(cls):
-        Author.objects.create(name='John Smith', alias='smithj')
-        Author.objects.create(name='Rhonda')
+        Author.objects.create(name="John Smith", alias="smithj")
+        Author.objects.create(name="Rhonda")
 
     def test_basic(self):
-        authors = Author.objects.annotate(name_part=Left('name', 5))
-        self.assertQuerysetEqual(authors.order_by('name'), ['John ', 'Rhond'], lambda a: a.name_part)
+        authors = Author.objects.annotate(name_part=Left("name", 5))
+        self.assertQuerysetEqual(
+            authors.order_by("name"), ["John ", "Rhond"], lambda a: a.name_part
+        )
         # If alias is null, set it to the first 2 lower characters of the name.
-        Author.objects.filter(alias__isnull=True).update(alias=Lower(Left('name', 2)))
-        self.assertQuerysetEqual(authors.order_by('name'), ['smithj', 'rh'], lambda a: a.alias)
+        Author.objects.filter(alias__isnull=True).update(alias=Lower(Left("name", 2)))
+        self.assertQuerysetEqual(
+            authors.order_by("name"), ["smithj", "rh"], lambda a: a.alias
+        )
 
     def test_invalid_length(self):
         with self.assertRaisesMessage(ValueError, "'length' must be greater than 0"):
-            Author.objects.annotate(raises=Left('name', 0))
+            Author.objects.annotate(raises=Left("name", 0))
 
     def test_expressions(self):
-        authors = Author.objects.annotate(name_part=Left('name', Value(3, output_field=IntegerField())))
-        self.assertQuerysetEqual(authors.order_by('name'), ['Joh', 'Rho'], lambda a: a.name_part)
+        authors = Author.objects.annotate(
+            name_part=Left("name", Value(3, output_field=IntegerField()))
+        )
+        self.assertQuerysetEqual(
+            authors.order_by("name"), ["Joh", "Rho"], lambda a: a.name_part
+        )