diff --git a/Lib/test/test_ssl.py b/Lib/test/test_ssl.py
index 7bbaa9f..b704b78 100644
--- a/Lib/test/test_ssl.py
+++ b/Lib/test/test_ssl.py
@@ -4101,7 +4101,9 @@
                 self.assertTrue(session)
                 with self.assertRaises(TypeError) as e:
                     s.session = object
-                self.assertEqual(str(e.exception), 'Value is not a SSLSession.')
+                self.assertEqual(
+                    str(e.exception), 'Value is not an SSLSession.'
+                )
 
             with client_context.wrap_socket(socket.socket(),
                                             server_hostname=hostname) as s: