diff --git a/tests/system_tests_delivery_counts.py b/tests/system_tests_delivery_counts.py
index f6c7b14c6..1bf5f995e 100644
--- a/tests/system_tests_delivery_counts.py
+++ b/tests/system_tests_delivery_counts.py
@@ -980,7 +980,6 @@ def on_released(self, event):
                 self.poll_timer_started = True
                 self.poll_timer = event.reactor.schedule(0.5, PollTimeout(self))
 
-
     def verify_released(self, large_message=False):
         """
         Verify the link released count by releasing all received messages