Refs #35402 -- Added tests for invalid usage of submodules in some settings.

tests/auth_tests/test_validators.py

@@ -14,7 +14,7 @@ from django.contrib.auth.password_validation import (
     password_validators_help_texts,
     validate_password,
 )
-from django.core.exceptions import ValidationError
+from django.core.exceptions import ImproperlyConfigured, ValidationError
 from django.db import models
 from django.test import SimpleTestCase, TestCase, override_settings
 from django.test.utils import isolate_apps
@@ -50,6 +50,15 @@ class PasswordValidationTest(SimpleTestCase):
 
         self.assertEqual(get_password_validators([]), [])
 
+    def test_get_password_validators_custom_invalid(self):
+        validator_config = [{"NAME": "json.tool"}]
+        msg = (
+            "The module in NAME could not be imported: json.tool. "
+            "Check your AUTH_PASSWORD_VALIDATORS setting."
+        )
+        with self.assertRaisesMessage(ImproperlyConfigured, msg):
+            get_password_validators(validator_config)
+
     def test_validate_password(self):
         self.assertIsNone(validate_password("sufficiently-long"))
         msg_too_short = (