diff --git a/tests/performance/test_concurrency.py b/tests/performance/test_concurrency.py
index 1c4dc251..ec016d32 100644
--- a/tests/performance/test_concurrency.py
+++ b/tests/performance/test_concurrency.py
@@ -20,7 +20,8 @@ def server(request):
     p.join(timeout=15)
 
 
-@pytest.mark.xfail(reason="currently fails >85% of requests on GitHub runner, requires several re-runs to pass")
+@pytest.mark.xfail(reason="currently fails >85% of requests on GitHub runner, "
+                   "requires several re-runs to pass")
 @pytest.mark.skipif(platform.python_implementation() == "PyPy", reason="Not working currently.")
 def test_concurrency_error_rates(server):
     """Test with Apache benchmark tool."""