diff --git a/playbooks/legacy/ironic-inspector-grenade-dsvm/run.yaml b/playbooks/legacy/ironic-inspector-grenade-dsvm/run.yaml
index 5c504c6ed..a90f51b76 100644
--- a/playbooks/legacy/ironic-inspector-grenade-dsvm/run.yaml
+++ b/playbooks/legacy/ironic-inspector-grenade-dsvm/run.yaml
@@ -105,6 +105,7 @@
           export DEVSTACK_GATE_CONFIGDRIVE=1
           export DEVSTACK_GATE_IRONIC_DRIVER=ipmi
           export DEVSTACK_LOCAL_CONFIG+=$'\n'"IRONIC_DEFAULT_DEPLOY_INTERFACE=iscsi"
+          export DEVSTACK_LOCAL_CONFIG+=$'\n'"IRONIC_DEFAULT_BOOT_OPTION=netboot"
 
           export BRANCH_OVERRIDE="{{ zuul.override_checkout | default('default') }}"
           if [ "$BRANCH_OVERRIDE" != "default" ] ; then
diff --git a/zuul.d/ironic-inspector-jobs.yaml b/zuul.d/ironic-inspector-jobs.yaml
index 30dc1534a..f2e2beda5 100644
--- a/zuul.d/ironic-inspector-jobs.yaml
+++ b/zuul.d/ironic-inspector-jobs.yaml
@@ -47,6 +47,7 @@
     parent: ironic-inspector-base
     vars:
       devstack_localrc:
+        IRONIC_DEFAULT_BOOT_OPTION: netboot
         IRONIC_INSPECTOR_STANDALONE: False
       devstack_services:
         s-account: True
@@ -79,6 +80,7 @@
     parent: ironic-inspector-base
     vars:
       devstack_localrc:
+        IRONIC_DEFAULT_BOOT_OPTION: netboot
         IRONIC_INSPECTOR_MANAGED_BOOT: True
         IRONIC_INSPECTOR_NODE_NOT_FOUND_HOOK: ''