diff --git a/scripts/pagespeed-sitemap.ts b/scripts/pagespeed-sitemap.ts
index a81709985..75c0e6faa 100644
--- a/scripts/pagespeed-sitemap.ts
+++ b/scripts/pagespeed-sitemap.ts
@@ -148,7 +148,7 @@ async function main() {
       execSync(lhciCommand, {
         encoding: 'utf8',
         stdio: 'inherit',
-        env: { ...process.env, CHROME_PATH: chromePath },
+        env: { ...process.env, CHROME_PATH: chromePath, TARGET_URL: targetUrl },
       });
     } catch (err: any) {
       console.warn('⚠️ LHCI assertion finished with warnings or errors.');