diff --git a/tests/roles/bootstrap-host/templates/user_variables.aio.yml.j2 b/tests/roles/bootstrap-host/templates/user_variables.aio.yml.j2
index 75bd997910..7a5bddba01 100644
--- a/tests/roles/bootstrap-host/templates/user_variables.aio.yml.j2
+++ b/tests/roles/bootstrap-host/templates/user_variables.aio.yml.j2
@@ -72,6 +72,7 @@ nova_api_threads: 1
 nova_osapi_compute_workers: 1
 nova_conductor_workers: 1
 nova_metadata_workers: 1
+nova_scheduler_workers: 1
 
 ## Neutron
 neutron_rpc_workers: 1