diff --git a/manifests/2.18.0/opensearch-2.18.0-test.yml b/manifests/2.18.0/opensearch-2.18.0-test.yml
index b945770c1f..5bbf6b73ba 100644
--- a/manifests/2.18.0/opensearch-2.18.0-test.yml
+++ b/manifests/2.18.0/opensearch-2.18.0-test.yml
@@ -146,3 +146,5 @@ components:
       test-configs:
         - with-security
         - without-security
+      additional-cluster-configs:
+        cluster.application_templates.enabled: true