diff --git a/tsdb/challenges/default.json b/tsdb/challenges/default.json
index 6c297609..9303093d 100644
--- a/tsdb/challenges/default.json
+++ b/tsdb/challenges/default.json
@@ -125,9 +125,9 @@
           "warmup-iterations": 50,
           "clients": {{ search_clients | default(1) | int }},
           "iterations": 100
-        },
+        }
         {% if p_index_mode == "time_series" and skip_running_tsdb_aggs is not defined %}
-        {
+        ,{
           "operation": "date-histo-memory-usage-hour",
           "warmup-iterations": 50,
           "clients": {{ search_clients | default(1) | int }},
@@ -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 }},