diff --git a/wagtail/tests/settings.py b/wagtail/tests/settings.py
index ace1493cd..da059751b 100644
--- a/wagtail/tests/settings.py
+++ b/wagtail/tests/settings.py
@@ -50,6 +50,7 @@ TEMPLATES = [
                 'wagtail.tests.context_processors.do_not_use_static_url',
                 'wagtail.contrib.settings.context_processors.settings',
             ],
+            'debug': True,
         },
     },
     {