Copy 3 new templates into your source code like in the installation process :
- tests/Application/templates/bundles/SyliusShopBundle/Cart/Summary/_totals.html.twig
- tests/Application/templates/bundles/SyliusShopBundle/Checkout/_summary.html.twig
- tests/Application/templates/bundles/SyliusShopBundle/_scripts.html.twig