diff --git a/test_communication/test/subscriber_py.py b/test_communication/test/subscriber_py.py
index 48aa9b31..57d8d4cf 100644
--- a/test_communication/test/subscriber_py.py
+++ b/test_communication/test/subscriber_py.py
@@ -68,7 +68,7 @@ def listener(message_name, namespace):
     node.destroy_node()
     rclpy.shutdown()
 
-    assert len(received_messages) == len(expected_msgs),\
+    assert len(received_messages) == len(expected_msgs), \
         'Should have received {} {} messages from talker'.format(len(expected_msgs), message_name)