diff --git a/zuul.d/ironic-python-agent-jobs.yaml b/zuul.d/ironic-python-agent-jobs.yaml
index f5683b06c..34c4647a0 100644
--- a/zuul.d/ironic-python-agent-jobs.yaml
+++ b/zuul.d/ironic-python-agent-jobs.yaml
@@ -22,6 +22,8 @@
         IRONIC_BUILD_DEPLOY_RAMDISK: True
         IRONIC_VM_COUNT: 2
         IRONIC_VM_SPECS_RAM: 2750
+        # This matches the default in ironic-base, specifying for clarity
+        IRONIC_RAMDISK_TYPE: dib
       devstack_services:
         dstat: false