diff --git a/legacy/public/setup/database-setup.php b/legacy/public/setup/database-setup.php
index 46cfb8003..134b70687 100644
--- a/legacy/public/setup/database-setup.php
+++ b/legacy/public/setup/database-setup.php
@@ -294,6 +294,6 @@ class DatabaseSetup extends Setup
      */
     private function updateDjangoTables()
     {
-        shell_exec('LIBRETIME_CONFIG_FILEPATH=' . INSTALLER_CONFIG_FILEPATH . ' libretime-api migrate');
+        shell_exec('DJANGO_SETTINGS_MODULE=libretime_api.settings.testing LIBRETIME_CONFIG_FILEPATH=' . INSTALLER_CONFIG_FILEPATH . ' libretime-api migrate');
     }
 }