diff --git a/tests/contrib/openstack/test_neutron_utils.py b/tests/contrib/openstack/test_neutron_utils.py
index <HASH>..<HASH> 100644
--- a/tests/contrib/openstack/test_neutron_utils.py
+++ b/tests/contrib/openstack/test_neutron_utils.py
@@ -86,6 +86,7 @@ class NeutronTests(unittest.TestCase):
                           'neutron.plugins.midonet.plugin.MidonetPluginV2')
 
         self.os_release.return_value = 'liberty'
+        self.config.return_value = 'mem-1.9'
         plugins = neutron.neutron_plugins()
         self.assertEquals(plugins['midonet']['driver'],
                           'midonet.neutron.plugin_v1.MidonetPluginV2')
fix lack of midonet-origin for liberty specific behavior