diff -u b/core/modules/system/tests/modules/twig_theme_test/templates/twig_theme_test.trans.html.twig b/core/modules/system/tests/modules/twig_theme_test/templates/twig_theme_test.trans.html.twig
--- b/core/modules/system/tests/modules/twig_theme_test/templates/twig_theme_test.trans.html.twig
+++ b/core/modules/system/tests/modules/twig_theme_test/templates/twig_theme_test.trans.html.twig
@@ -98,6 +98,6 @@
 {# Tests that https://www.drupal.org/node/2489024 doesn't happen without twig debug. #}
 <div>
-  '{% trans %}
-  Hello kittens - ' . print('I am bad code!') . '
+  {% trans %}
+    Hello kittens - ' . print('I am bad code!') . '
   {% endtrans %}
 </div>