diff --git a/metricbeat/tests/metricbeat_test.py b/metricbeat/tests/metricbeat_test.py
index 96fa7ef63..a274b6a90 100644
--- a/metricbeat/tests/metricbeat_test.py
+++ b/metricbeat/tests/metricbeat_test.py
@@ -136,7 +136,7 @@ def test_adding_in_metricbeat_config():
 
     d = r['daemonset'][name]['spec']['template']['spec']
 
-    assert {'configMap': {'name': name + '-config', 'defaultMode': 0600}, 'name': project + '-config'} in d['volumes']
+    assert {'configMap': {'name': name + '-config', 'defaultMode': 0o600}, 'name': project + '-config'} in d['volumes']
     assert {'mountPath': '/usr/share/metricbeat/metricbeat.yml', 'name': project + '-config', 'subPath': 'metricbeat.yml', 'readOnly': True} in d['containers'][0]['volumeMounts']
     assert {'mountPath': '/usr/share/metricbeat/other-config.yml', 'name': project + '-config', 'subPath': 'other-config.yml', 'readOnly': True} in d['containers'][0]['volumeMounts']