diff --git a/src/allmydata/test/test_openmetrics.py b/src/allmydata/test/test_openmetrics.py
index 9ef7c9c8e..fdb645b42 100644
--- a/src/allmydata/test/test_openmetrics.py
+++ b/src/allmydata/test/test_openmetrics.py
@@ -115,3 +115,4 @@ class OpenMetrics(unittest.TestCase):
         # The parser throws if it does not like its input.
         # Wrapped in a list() to drain the generator.
         families = list(parser.text_string_to_metric_families(metrics))
+