diff --git a/tests/catalog/test_models.py b/tests/catalog/test_models.py
index 8f8a5a2..6ff98da 100644
--- a/tests/catalog/test_models.py
+++ b/tests/catalog/test_models.py
@@ -287,7 +287,7 @@ def test_long_name(self):
         group = catalog_models.MockTagGroup.objects.first()
         try:
             tag = catalog_models.MockTag.objects.create(group=group, name=name)
-            self.assertLessEqual(len(tag.slug), catalog.models.SLUG_MAX_LENGTH)
+            self.assertLessEqual(len(tag.slug), catalog.models.Tag.SLUG_MAX_LENGTH)
         except DataError as e:
             self.assertTrue(False, f'Tag has too long name. {e}')