diff --git a/argocd/prometheus-adapter/test/argocd_values.yaml b/argocd/prometheus-adapter/test/argocd_values.yaml
index 5bb635d..e8814d8 100644
--- a/argocd/prometheus-adapter/test/argocd_values.yaml
+++ b/argocd/prometheus-adapter/test/argocd_values.yaml
@@ -1,6 +1,7 @@
 prometheus-adapter:
   prometheus:
     url: http://prometheus-server.observability.svc
+    port: 80
 
   rules:
     resource: