Ticket #17882: 17882-better-fix-with-setting-changed-signal.diff

django/test/signals.py

@@ +1 @@
+from django.db import close_connection
 from django.dispatch import Signal
 
 template_rendered = Signal(providing_args=["template", "context"])
@@ -3 +4 @@
 
 setting_changed = Signal(providing_args=["setting", "value"])
+
+# Close the database connection to re-establish it with the proper time zone.
+def close_connection_on_time_zone_change(**kwargs):
+    if (kwargs['setting'] == 'USE_TZ'
+        or (kwargs['setting'] == 'TIME_ZONE' and not settings.USE_TZ)):
+        close_connection()
+setting_changed.connect(close_connection_on_time_zone_change)