1 files changed, 7 insertions, 0 deletions
diff --git a/django/test/signals.py b/django/test/signals.py
index 371b90c9ee..6f6d5aec81 100644
--- a/django/test/signals.py
+++ b/django/test/signals.py
@@ -10,6 +10,7 @@ from django.db import connections, router
 from django.db.utils import ConnectionRouter
 from django.dispatch import Signal, receiver
 from django.utils import six, timezone
+from django.utils.formats import FORMAT_SETTINGS, reset_format_cache
 from django.utils.functional import empty
 
 template_rendered = Signal(providing_args=["template", "context"])
@@ -118,6 +119,12 @@ def language_changed(**kwargs):
 
 
 @receiver(setting_changed)
+def localize_settings_changed(**kwargs):
+    if kwargs['setting'] in FORMAT_SETTINGS or kwargs['setting'] == 'USE_THOUSAND_SEPARATOR':
+        reset_format_cache()
+
+
+@receiver(setting_changed)
 def file_storage_changed(**kwargs):
     if kwargs['setting'] == 'DEFAULT_FILE_STORAGE':
         from django.core.files.storage import default_storage