diff --git a/codex-rs/core/tests/common/apps_test_server.rs b/codex-rs/core/tests/common/apps_test_server.rs
index 0d3d3b1b80..ccdbd247b4 100644
--- a/codex-rs/core/tests/common/apps_test_server.rs
+++ b/codex-rs/core/tests/common/apps_test_server.rs
@@ -417,6 +417,7 @@ async fn mount_streamable_http_json_rpc(
         searchable,
         include_app_only_tool,
         tools_list_behavior,
+        tool_call_delay,
     )
     .await;
 }