diff --git a/tests/bin/install.sh b/tests/bin/install.sh
index e75436ef986..0dc2cff9d2b 100755
--- a/tests/bin/install.sh
+++ b/tests/bin/install.sh
@@ -175,6 +175,7 @@ install_e2e_site() {
 		php wp-cli.phar core config --dbname=$DB_NAME --dbuser=$DB_USER --dbpass=$DB_PASS --dbhost=$DB_HOST --dbprefix=wp_ --extra-php <<PHP
 /* Change WP_MEMORY_LIMIT to increase the memory limit for public pages. */
 define('WP_MEMORY_LIMIT', '256M');
+define('SCRIPT_DEBUG', true);
 PHP
 		php wp-cli.phar core install --url="$WP_SITE_URL" --title="Example" --admin_user=admin --admin_password=password --admin_email=info@example.com --path=$WP_CORE_DIR --skip-email
 		php wp-cli.phar db import $WP_DB_DATA