diff --git a/devstack-vm-gate-wrap.sh b/devstack-vm-gate-wrap.sh
index 89e470a9..b8c3f4cd 100755
--- a/devstack-vm-gate-wrap.sh
+++ b/devstack-vm-gate-wrap.sh
@@ -316,6 +316,9 @@ export OVERRIDE_ZUUL_BRANCH=${OVERRIDE_ZUUL_BRANCH:-$ZUUL_BRANCH}
 # postgresql, mongodb.
 export DEVSTACK_GATE_CEILOMETER_BACKEND=${DEVSTACK_GATE_CEILOMETER_BACKEND:-mysql}
 
+# Set Zaqar backend to override the default one. It could be mongodb, redis.
+export DEVSTACK_GATE_ZAQAR_BACKEND=${DEVSTACK_GATE_ZAQAR_BACKEND:-mongodb}
+
 if ! function_exists "gate_hook"; then
     # the command we use to run the gate
     function gate_hook {
diff --git a/devstack-vm-gate.sh b/devstack-vm-gate.sh
index c7bc6256..7eafff6b 100755
--- a/devstack-vm-gate.sh
+++ b/devstack-vm-gate.sh
@@ -113,6 +113,7 @@ CINDER_PERIODIC_INTERVAL=10
 export OS_NO_CACHE=True
 CEILOMETER_BACKEND=$DEVSTACK_GATE_CEILOMETER_BACKEND
 LIBS_FROM_GIT=$DEVSTACK_PROJECT_FROM_GIT
+ZAQAR_BACKEND=$DEVSTACK_GATE_ZAQAR_BACKEND
 EOF
 
     if [[ "$DEVSTACK_CINDER_SECURE_DELETE" -eq "0" ]]; then