diff --git a/terraform/testcases/containerinsight_ecs_prometheus/ecs_taskdef.tpl b/terraform/testcases/containerinsight_ecs_prometheus/ecs_taskdef.tpl
index 6b3845cd3..ba6268aee 100644
--- a/terraform/testcases/containerinsight_ecs_prometheus/ecs_taskdef.tpl
+++ b/terraform/testcases/containerinsight_ecs_prometheus/ecs_taskdef.tpl
@@ -2,7 +2,7 @@
     {
       "name": "aoc-collector",
       "image": "${aoc_image}",
-      "user": 0,
+      "user": "root",
       "cpu": 10,
       "memory": 256,
       "secrets": [