4 files changed, 3 insertions, 5 deletions
diff --git a/tests/test_runner_apps/sample/doctests.py b/tests/test_runner_apps/sample/doctests.py
index 8707ecaf86..a657d9bdf3 100644
--- a/tests/test_runner_apps/sample/doctests.py
+++ b/tests/test_runner_apps/sample/doctests.py
@@ -32,6 +32,7 @@ def factorial(n):
     """
 
     import math
+
     if not n >= 0:
         raise ValueError("n must be >= 0")
     if math.floor(n) != n:
diff --git a/tests/test_runner_apps/sample/pattern_tests.py b/tests/test_runner_apps/sample/pattern_tests.py
index f62a233d75..4500eacb8e 100644
--- a/tests/test_runner_apps/sample/pattern_tests.py
+++ b/tests/test_runner_apps/sample/pattern_tests.py
@@ -2,6 +2,5 @@ from unittest import TestCase
 
 
 class Test(TestCase):
-
     def test_sample(self):
         self.assertEqual(1, 1)
diff --git a/tests/test_runner_apps/sample/tests/tests.py b/tests/test_runner_apps/sample/tests/tests.py
index 58bd4e7f1e..a9faf514f2 100644
--- a/tests/test_runner_apps/sample/tests/tests.py
+++ b/tests/test_runner_apps/sample/tests/tests.py
@@ -2,6 +2,5 @@ from unittest import TestCase
 
 
 class Test(TestCase):
-
     def test_sample(self):
         pass
diff --git a/tests/test_runner_apps/sample/tests_sample.py b/tests/test_runner_apps/sample/tests_sample.py
index eb977e44fb..6e876ebd41 100644
--- a/tests/test_runner_apps/sample/tests_sample.py
+++ b/tests/test_runner_apps/sample/tests_sample.py
@@ -1,19 +1,18 @@
 import doctest
 from unittest import TestCase
 
-from django.test import SimpleTestCase, TestCase as DjangoTestCase
+from django.test import SimpleTestCase
+from django.test import TestCase as DjangoTestCase
 
 from . import doctests
 
 
 class TestVanillaUnittest(TestCase):
-
     def test_sample(self):
         self.assertEqual(1, 1)
 
 
 class TestDjangoTestCase(DjangoTestCase):
-
     def test_sample(self):
         self.assertEqual(1, 1)