diff --git a/tripleoclient/tests/v1/test_container_image.py b/tripleoclient/tests/v1/test_container_image.py
index bce13e6a3..1b98d99f4 100644
--- a/tripleoclient/tests/v1/test_container_image.py
+++ b/tripleoclient/tests/v1/test_container_image.py
@@ -603,7 +603,7 @@ class TestContainerImagePrepare(TestPluginV1):
             'neutron_driver': 'ovn',
             'name_suffix': '',
             'tag': 'latest',
-            'namespace': 'docker.io/tripleou',
+            'namespace': 'docker.io/tripleomaster',
             'name_prefix':
             'centos-binary-'
         }
@@ -623,7 +623,7 @@ class TestContainerImagePrepare(TestPluginV1):
                 'neutron_driver': 'ovn',
                 'name_suffix': '',
                 'tag': 'latest',
-                'namespace': 'docker.io/tripleou',
+                'namespace': 'docker.io/tripleomaster',
                 'name_prefix':
                 'centos-binary-'
             },
diff --git a/tripleoclient/v2/tripleo_container_image.py b/tripleoclient/v2/tripleo_container_image.py
index 4209c6279..5c8c9c37b 100644
--- a/tripleoclient/v2/tripleo_container_image.py
+++ b/tripleoclient/v2/tripleo_container_image.py
@@ -138,7 +138,7 @@ class Build(command.Command):
             "--namespace",
             dest="namespace",
             metavar="<registry-namespace>",
-            default="tripleou",
+            default="tripleomaster",
             help=_("Container registry namespace (default: %(default)s)"),
         )
         parser.add_argument(