Paint it Black by the Rolling Stones (#920)

diff --git a/tests/test_util.py b/tests/test_util.py
index 91847e0..6224448 100644
--- a/tests/test_util.py
+++ b/tests/test_util.py
@@ -7,6 +7,7 @@
     """
     Tests for handling of certain OpenSSL error cases.
     """
+
     def test_exception_from_error_queue_nonexistent_reason(self):
         """
         :func:`exception_from_error_queue` raises ``ValueError`` when it