diff --git a/scripts/check-memory-fd-repro.mjs b/scripts/check-memory-fd-repro.mjs
index edc08a8af2af..1e8487c129b7 100644
--- a/scripts/check-memory-fd-repro.mjs
+++ b/scripts/check-memory-fd-repro.mjs
@@ -712,7 +712,7 @@ async function main() {
     OPENCLAW_CONFIG_PATH: configPath,
     OPENCLAW_GATEWAY_TOKEN: token,
   };
-  let child = null;
+  let child;
 
   const summary = {
     generatedAt: new Date().toISOString(),