diff --git a/t/unit/test_models.py b/t/unit/test_models.py
index 94fb0fa9..98f5c08a 100644
--- a/t/unit/test_models.py
+++ b/t/unit/test_models.py
@@ -2,19 +2,43 @@
 
 import importlib
 
-from django.test import TestCase
+from django.test import TestCase, override_settings
+from django.utils import six
 
-from django_celery_beat.models import PeriodicTask
+from django_celery_beat import models
 
 
 class ModelMigrationTests(TestCase):
     def test_periodic_task_name_max_length_defaults_to_200_in_model(self):
-        self.assertEqual(200, PeriodicTask._meta.get_field('name').max_length)
+        six.moves.reload_module(models)
+        self.assertEqual(
+            200, models.PeriodicTask._meta.get_field('name').max_length)
+
+    @override_settings(DJANGO_CELERY_BEAT_NAME_MAX_LENGTH=191)
+    def test_periodic_task_name_max_length_changed_to_191_in_model(self):
+        six.moves.reload_module(models)
+        self.assertEqual(
+            191, models.PeriodicTask._meta.get_field('name').max_length)
 
     def test_periodic_task_name_max_length_defaults_to_200_in_migration(self):
-        initial_migration = importlib.import_module('django_celery_beat.migrations.0001_initial').Migration
+        initial_migration_module = importlib.import_module(
+            'django_celery_beat.migrations.0001_initial')
+        six.moves.reload_module(initial_migration_module)
+        initial_migration = initial_migration_module.Migration
         periodic_task_creation = initial_migration.operations[2]
         fields = dict(periodic_task_creation.fields)
 
         self.assertEqual('PeriodicTask', periodic_task_creation.name)
         self.assertEqual(200, fields['name'].max_length)
+
+    @override_settings(DJANGO_CELERY_BEAT_NAME_MAX_LENGTH=191)
+    def test_periodic_task_name_max_length_changed_to_191_in_migration(self):
+        initial_migration_module = importlib.import_module(
+            'django_celery_beat.migrations.0001_initial')
+        six.moves.reload_module(initial_migration_module)
+        initial_migration = initial_migration_module.Migration
+        periodic_task_creation = initial_migration.operations[2]
+        fields = dict(periodic_task_creation.fields)
+
+        self.assertEqual('PeriodicTask', periodic_task_creation.name)
+        self.assertEqual(191, fields['name'].max_length)
diff --git a/tox.ini b/tox.ini
index d301bdf5..48bbface 100644
--- a/tox.ini
+++ b/tox.ini
@@ -37,7 +37,11 @@ recreate = False
 commands =
     pip install -U https://github.com/celery/celery/zipball/master#egg=celery
     pip install -U https://github.com/celery/kombu/zipball/master#egg=kombu
-    py.test -xv
+    py.test -xv --ignore=t/unit/test_models.py
+
+[testenv:models]
+commands =
+    py.test -xv -k 'ModelMigrationTests'
 
 [testenv:apicheck]
 basepython = python3.5
@@ -70,4 +74,4 @@ usedevelop = true
 commands =
     pip install -U https://github.com/celery/celery/zipball/master#egg=celery
     pip install -U https://github.com/celery/kombu/zipball/master#egg=kombu
-    py.test -x --cov=django_celery_beat --cov-report=xml --no-cov-on-fail
+    py.test -x --cov=django_celery_beat --cov-report=xml --no-cov-on-fail --ignore=t/unit/test_models.py