diff --git a/.zuul.yaml b/.zuul.yaml
index 1b82909..325dd58 100644
--- a/.zuul.yaml
+++ b/.zuul.yaml
@@ -831,6 +831,8 @@
           neutron-trunk: true
           neutron-log: true
           neutron-port-forwarding: true
+        devstack_localrc:
+          USE_PYTHON3: true
         devstack_local_conf:
           post-config:
             $NEUTRON_CONF: