diff --git a/playbooks/legacy/grenade-dsvm-ironic-multinode-multitenant/run.yaml b/playbooks/legacy/grenade-dsvm-ironic-multinode-multitenant/run.yaml
index 128ab7bf97..4bce330626 100644
--- a/playbooks/legacy/grenade-dsvm-ironic-multinode-multitenant/run.yaml
+++ b/playbooks/legacy/grenade-dsvm-ironic-multinode-multitenant/run.yaml
@@ -146,7 +146,7 @@
           export DEVSTACK_GATE_IRONIC_BUILD_RAMDISK=0
           export DEVSTACK_LOCAL_CONFIG+=$'\n'"IRONIC_INSPECTOR_BUILD_RAMDISK=False"
 
-          export DEVSTACK_LOCAL_CONFIG+=$'\n'"IRONIC_VM_COUNT=7"
+          export DEVSTACK_LOCAL_CONFIG+=$'\n'"IRONIC_VM_COUNT=4"
 
           # Ensure the ironic-vars-EARLY file exists
           touch ironic-vars-early
diff --git a/playbooks/legacy/grenade-dsvm-ironic/run.yaml b/playbooks/legacy/grenade-dsvm-ironic/run.yaml
index 4c4b2690ed..856254c04b 100644
--- a/playbooks/legacy/grenade-dsvm-ironic/run.yaml
+++ b/playbooks/legacy/grenade-dsvm-ironic/run.yaml
@@ -93,7 +93,7 @@
           export DEVSTACK_LOCAL_CONFIG+=$'\n'"IRONIC_AUTOMATED_CLEAN_ENABLED=False"
           export DEVSTACK_GATE_TEMPEST_REGEX=test_server_basic_ops
 
-          export DEVSTACK_LOCAL_CONFIG+=$'\n'"IRONIC_VM_COUNT=7"
+          export DEVSTACK_LOCAL_CONFIG+=$'\n'"IRONIC_VM_COUNT=4"
 
           # Ensure the ironic-vars-EARLY file exists
           touch ironic-vars-early
diff --git a/zuul.d/ironic-jobs.yaml b/zuul.d/ironic-jobs.yaml
index 421c20a03b..512bca523e 100644
--- a/zuul.d/ironic-jobs.yaml
+++ b/zuul.d/ironic-jobs.yaml
@@ -107,7 +107,7 @@
         IRONIC_ENABLED_DEPLOY_INTERFACES: "iscsi,direct,ansible"
         IRONIC_ENABLED_RESCUE_INTERFACES: "fake,agent,no-rescue"
         IRONIC_RPC_TRANSPORT: json-rpc
-        IRONIC_VM_COUNT: 6
+        IRONIC_VM_COUNT: 4
         IRONIC_VM_VOLUME_COUNT: 2
         # We're using a lot of disk space in this job. Some testing nodes have
         # a small root partition, so use /opt which is mounted from a bigger
@@ -141,6 +141,7 @@
         IRONIC_DEPLOY_DRIVER: redfish
         IRONIC_ENABLED_HARDWARE_TYPES: redfish
         IRONIC_VM_COUNT: 2
+        IRONIC_AUTOMATED_CLEAN_ENABLED: False
 
 - job:
     name: ironic-tempest-pxe_ipmitool-postgres
@@ -251,6 +252,7 @@
         IRONIC_AUTOMATED_CLEAN_ENABLED: False
         SWIFT_ENABLE_TEMPURLS: True
         SWIFT_TEMPURL_KEY: secretkey
+        IRONIC_VM_COUNT: 1
       devstack_plugins:
         ironic-inspector: https://opendev.org/openstack/ironic-inspector
       devstack_services: