diff --git a/apps/ai-game-creator-shell/src-tauri/src/agent/codex_app_server/process_tree.rs b/apps/ai-game-creator-shell/src-tauri/src/agent/codex_app_server/process_tree.rs
index 54fc35f92..795adfbcf 100644
--- a/apps/ai-game-creator-shell/src-tauri/src/agent/codex_app_server/process_tree.rs
+++ b/apps/ai-game-creator-shell/src-tauri/src/agent/codex_app_server/process_tree.rs
@@ -304,8 +304,11 @@ mod tests {
     use std::process::Stdio;
     use tokio::io::{AsyncBufReadExt, AsyncWriteExt};
 
+    // 夹具用 `--exact` 复跑本测试二进制，这个字符串必须与真实模块路径逐字一致；本模块随
+    // codex provider 收敛挂到 `agent::codex_provider::app_server::` 下，故同步更新（否则子进程跑 0 个用例、
+    // 父进程等 marker 超时 → `Elapsed(())`）。
     const FIXTURE: &str =
-        "agent::codex_app_server::process_tree::tests::owned_tree_process_fixture";
+        "agent::codex_provider::app_server::process_tree::tests::owned_tree_process_fixture";
 
     #[cfg(target_os = "linux")]
     #[test]