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 5bbf6b73ba..102c347be5 100644
--- a/manifests/2.18.0/opensearch-2.18.0-test.yml
+++ b/manifests/2.18.0/opensearch-2.18.0-test.yml
@@ -148,3 +148,4 @@ components:
         - without-security
       additional-cluster-configs:
         cluster.application_templates.enabled: true
+        opensearch.experimental.feature.application_templates.enabled: true