diff --git a/zaza/openstack/utilities/openstack.py b/zaza/openstack/utilities/openstack.py
index 64d42a8..bb834f0 100644
--- a/zaza/openstack/utilities/openstack.py
+++ b/zaza/openstack/utilities/openstack.py
@@ -1609,7 +1609,7 @@ def get_undercloud_auth():
             'API_VERSION': 3,
         }
         if domain:
-            auth_settings['OS_DOMAIN_NAME': 'admin_domain'] = domain
+            auth_settings['OS_DOMAIN_NAME'] = domain
         else:
             auth_settings['OS_USER_DOMAIN_NAME'] = (
                 os.environ.get('OS_USER_DOMAIN_NAME'))