diff --git a/argocd/prometheus/test/argocd_values.yaml b/argocd/prometheus/test/argocd_values.yaml
index 7cad2cc..7fe4828 100644
--- a/argocd/prometheus/test/argocd_values.yaml
+++ b/argocd/prometheus/test/argocd_values.yaml
@@ -1,4 +1,8 @@
 kube-prometheus-stack:
+  prometheusOperator:
+    admissionWebhooks:
+      certManager:
+        enabled: true
   prometheus-node-exporter:
     hostRootFsMount:
       mountPropagation: None