diff --git a/examples/general/config-array/webpack.config.js b/examples/general/config-array/webpack.config.js
index 9880fdf366..3c15ca173b 100644
--- a/examples/general/config-array/webpack.config.js
+++ b/examples/general/config-array/webpack.config.js
@@ -34,6 +34,7 @@ module.exports = [
     output: {
       filename: "bundle2.js",
     },
+    mode: "development",
     module: {
       rules: [
         {