diff --git a/playbooks/legacy/neutron-grenade-dvr-multinode/run.yaml b/playbooks/legacy/neutron-grenade-dvr-multinode/run.yaml
index 9fb53244628..60426b276bb 100644
--- a/playbooks/legacy/neutron-grenade-dvr-multinode/run.yaml
+++ b/playbooks/legacy/neutron-grenade-dvr-multinode/run.yaml
@@ -31,6 +31,7 @@
           export DEVSTACK_GATE_NEUTRON=1
           export DEVSTACK_GATE_CONFIGDRIVE=0
           export DEVSTACK_GATE_GRENADE=pullup
+          export DEVSTACK_GATE_USE_PYTHON3=True
           # Test DVR upgrade on multinode
           export PROJECTS="openstack-dev/grenade $PROJECTS"
           export DEVSTACK_GATE_NEUTRON_DVR=1
diff --git a/playbooks/legacy/neutron-grenade-multinode/run.yaml b/playbooks/legacy/neutron-grenade-multinode/run.yaml
index 0d7814a777b..02904d5706f 100644
--- a/playbooks/legacy/neutron-grenade-multinode/run.yaml
+++ b/playbooks/legacy/neutron-grenade-multinode/run.yaml
@@ -31,6 +31,7 @@
           export DEVSTACK_GATE_NEUTRON=1
           export DEVSTACK_GATE_CONFIGDRIVE=0
           export DEVSTACK_GATE_GRENADE=pullup
+          export DEVSTACK_GATE_USE_PYTHON3=True
           export PROJECTS="openstack-dev/grenade $PROJECTS"
           # Default to non DVR
           export DEVSTACK_GATE_NEUTRON_DVR=0