diff --git a/tsdb/challenges/default.json b/tsdb/challenges/default.json
index baab7494d..9303093da 100644
--- a/tsdb/challenges/default.json
+++ b/tsdb/challenges/default.json
@@ -150,9 +150,9 @@
           "warmup-iterations": 50,
           "clients": {{ search_clients | default(1) | int }},
           "iterations": 100
-        },
+        }
         {% endif %}
-        {
+        ,{
           "operation": "esql-fetch-500",
           "warmup-iterations": 50,
           "clients": {{ search_clients | default(1) | int }},