diff --git a/zaza/openstack/charm_tests/ovn/tests.py b/zaza/openstack/charm_tests/ovn/tests.py
index 30abddd..c5eae5e 100644
--- a/zaza/openstack/charm_tests/ovn/tests.py
+++ b/zaza/openstack/charm_tests/ovn/tests.py
@@ -72,7 +72,8 @@ class BaseCharmOperationTest(test_utils.BaseCharmTest):
                 'check_{}.cfg'.format(check_name)
             )
         ret = self._retry_check_commands_on_units(cmds, units)
-        logging.info(ret)
+        if ret:
+            logging.info(ret)
         self.assertIsNone(ret, msg=ret)