diff --git a/tests/files/packet_debian12-custom-cni-helm.yml b/tests/files/packet_debian12-custom-cni-helm.yml
index 183a7caf1aa..0ed919828c7 100644
--- a/tests/files/packet_debian12-custom-cni-helm.yml
+++ b/tests/files/packet_debian12-custom-cni-helm.yml
@@ -19,4 +19,5 @@ custom_cni_chart_values:
     enabled: false
   ipam:
     operator:
-      clusterPoolIPv4PodCIDR: "{{ kube_pods_subnet }}"
+      clusterPoolIPv4PodCIDRList:
+        - "{{ kube_pods_subnet }}"