diff --git a/sys_test/swarm_test_rig/test_response_time.py b/sys_test/swarm_test_rig/test_response_time.py
index 197cc6b5a793a2db7dd20ddb0c2159b175f17281..159e2c14f0f4ff3d6c3e0f49e27892860ad386fd 100644
--- a/sys_test/swarm_test_rig/test_response_time.py
+++ b/sys_test/swarm_test_rig/test_response_time.py
@@ -141,4 +141,4 @@ class TestResponseTime(unittest.TestCase):
         pass
 
     def _link_error_cb(self, errmsg):
-        self.fail()
+        self.fail(errmsg)