diff --git a/neutron_tempest_plugin/config.py b/neutron_tempest_plugin/config.py
index 7880eff..38d6ac6 100644
--- a/neutron_tempest_plugin/config.py
+++ b/neutron_tempest_plugin/config.py
@@ -207,6 +207,10 @@
                 deprecated_for_removal=True,
                 deprecated_reason='Tests are skipped according to '
                                   'the available extensions.'),
+    cfg.StrOpt('driver',
+               default=None,
+               choices=['openvswitch', 'ovn'],
+               help='Driver used by the FWaaS plugin.'),
 ]
 
 fwaas_group = cfg.OptGroup(