diff --git a/plugin/src/test/resources/rest-api-spec/api/xpack.ml.delete_expired_data.json b/plugin/src/test/resources/rest-api-spec/api/xpack.ml.delete_expired_data.json
index 88b73117ff3..4a4c079d522 100644
--- a/plugin/src/test/resources/rest-api-spec/api/xpack.ml.delete_expired_data.json
+++ b/plugin/src/test/resources/rest-api-spec/api/xpack.ml.delete_expired_data.json
@@ -3,7 +3,8 @@
     "methods": [ "DELETE" ],
     "url": {
       "path": "/_xpack/ml/_delete_expired_data",
-      "paths": [ "/_xpack/ml/_delete_expired_data" ]
+      "paths": [ "/_xpack/ml/_delete_expired_data" ],
+      "parts": {}
     },
     "body": null
   }