diff --git a/tests/test_formatter/test_formatter_output.py b/tests/test_formatter/test_formatter_output.py
index 144def6f2..027deb916 100644
--- a/tests/test_formatter/test_formatter_output.py
+++ b/tests/test_formatter/test_formatter_output.py
@@ -121,7 +121,10 @@ def test_formatter_correct(snapshot, cli_options, output):
     )
 
 
-@pytest.mark.skipif(sys.version_info < (3, 7), '3.6 is not supported by nbqa')
+@pytest.mark.skipif(
+    sys.version_info < (3, 7),
+    reason='3.6 is not supported by nbqa',
+)
 def test_ipynb(snapshot):
     """All correct code should not raise any violations and no output."""
     filename = './tests/fixtures/notebook.ipynb'