diff --git a/devstack-vm-gate.sh b/devstack-vm-gate.sh
index d46c160c..607d0f6c 100755
--- a/devstack-vm-gate.sh
+++ b/devstack-vm-gate.sh
@@ -248,6 +248,7 @@ TARGET_DEVSTACK_BRANCH=$GRENADE_NEW_BRANCH
 TARGET_RUN_SMOKE=False
 SAVE_DIR=\$BASE_RELEASE_DIR/save
 DO_NOT_UPGRADE_SERVICES=$DO_NOT_UPGRADE_SERVICES
+TEMPEST_CONCURRENCY=$TEMPEST_CONCURRENCY
 EOF
     # Make the workspace owned by the stack user
     sudo chown -R stack:stack $BASE