diff --git a/neutron/tests/functional/contrib/gate_hook.sh b/neutron/tests/functional/contrib/gate_hook.sh
index 5251bd9392..9b04233ac2 100644
--- a/neutron/tests/functional/contrib/gate_hook.sh
+++ b/neutron/tests/functional/contrib/gate_hook.sh
@@ -4,14 +4,9 @@ set -ex
 
 $BASE/new/devstack-gate/devstack-vm-gate.sh
 
-# Ideally devstack would only install dependencies
-# rather than starting services, but for now unstack is
-# a cheap way of accomplishing the same result.
-$BASE/new/devstack/unstack.sh
-
 # Add a rootwrap filter to support test-only
 # configuration (e.g. a KillFilter for processes that
 # use the python installed in a tox env).
 FUNC_FILTER=$BASE/new/neutron/neutron/tests/functional/contrib/filters.template
 sed -e "s+\$BASE_PATH+$BASE/new/neutron/.tox/dsvm-functional+" \
-    $FUNC_FILTER > /etc/neutron/rootwrap.d/functional.filters
+    $FUNC_FILTER | sudo tee /etc/neutron/rootwrap.d/functional.filters > /dev/null