diff --git a/environments/services-docker/ironic.yaml b/environments/services-docker/ironic.yaml
index e927ecb32f..d98ca1d467 100644
--- a/environments/services-docker/ironic.yaml
+++ b/environments/services-docker/ironic.yaml
@@ -3,3 +3,5 @@ resource_registry:
   OS::TripleO::Services::IronicConductor: ../../docker/services/ironic-conductor.yaml
   OS::TripleO::Services::IronicPxe: ../../docker/services/ironic-pxe.yaml
   OS::TripleO::Services::NovaIronic: ../../docker/services/nova-ironic.yaml
+parameter_defaults:
+  NovaSchedulerDiscoverHostsInCellsInterval: 15