diff --git a/tox.ini b/tox.ini
index 034d828..e8023fa 100644
--- a/tox.ini
+++ b/tox.ini
@@ -22,7 +22,7 @@ deps =
     django40: django<5.0,>=4.2
     django50: django<5.3,>=5
 set_env =
-    DJANGO_SETTINGS_MODULE
+    DJANGO_SETTINGS_MODULE = tests.testapp.settings.settings
 commands =
     pytest --cov