diff --git a/tests/validation/tests.py b/tests/validation/tests.py
index b571e0c..3a78ed1 100644
--- a/tests/validation/tests.py
+++ b/tests/validation/tests.py
@@ -1,5 +1,7 @@
 from __future__ import absolute_import, unicode_literals
 
+import unittest
+
 from django import forms
 from django.core.exceptions import NON_FIELD_ERRORS
 from django.test import TestCase
@@ -47,6 +49,13 @@ class BaseModelValidationTests(ValidationTestCase):
         mtv = ModelToValidate(number=10, name='Some Name', email='valid@email.com')
         self.assertEqual(None, mtv.full_clean())
 
+    @unittest.expectedFailure
+    def test_trailing_dot_on_email_passes(self):
+        #regression test for #12027
+        #EmailValidator regex will needs to be updated for this to fail.
+        mtv = ModelToValidate(number=10, name="Some Name", email="should@fail.com.")
+        self.assertFailsValidation(mtv.full_clean, ['email'])
+
     def test_wrong_url_value_raises_error(self):
         mtv = ModelToValidate(number=10, name='Some Name', url='not a url')
         self.assertFieldFailsValidationWithMessage(mtv.full_clean, 'url', ['Enter a valid URL.'])