diff --git a/wagtail/test/settings_ui.py b/wagtail/test/settings_ui.py
index 2f49142928..fd16445ab6 100644
--- a/wagtail/test/settings_ui.py
+++ b/wagtail/test/settings_ui.py
@@ -25,3 +25,5 @@ PATTERN_LIBRARY = {
     "PATTERN_BASE_TEMPLATE_NAME": "",
     "BASE_TEMPLATE_NAMES": [],
 }
+
+DEBUG = True