try this?

Author: mydea

dev-packages/e2e-tests/test-applications/ember-embroider/package.json

@@ -12,7 +12,7 @@
   },
   "scripts": {
     "proxy": "ts-node-script start-event-proxy.ts",
-    "build": "ember build --environment=production",
+    "build": "ember build --environment=development",
     "start": "ember serve --prod",
     "test": "playwright test",
     "test:build": "pnpm install && npx playwright install && pnpm build",