diff --git a/categories/__init__.py b/categories/__init__.py
index eae85e8..cc97aec 100644
--- a/categories/__init__.py
+++ b/categories/__init__.py
@@ -21,16 +21,3 @@ __version__ = get_version()
 
 
 default_app_config = 'categories.apps.CategoriesConfig'
-
-
-def register():
-    from categories import settings
-    from categories.registration import (_process_registry, registry)
-    _process_registry(settings.FK_REGISTRY, registry.register_fk)
-    _process_registry(settings.M2M_REGISTRY, registry.register_m2m)
-
-
-try:
-    register()
-except Exception as e:
-    print(e)
diff --git a/categories/tests/test_mgmt_commands.py b/categories/tests/test_mgmt_commands.py
index 78c1b28..7466910 100644
--- a/categories/tests/test_mgmt_commands.py
+++ b/categories/tests/test_mgmt_commands.py
@@ -1,20 +1,28 @@
 # -*- coding: utf-8 -*-
-from unittest import skip
-
 from django.core import management
 from django.core.management.base import CommandError
+from django.db import connection
 from django.test import TestCase
 
 
 class TestMgmtCommands(TestCase):
 
+    @classmethod
+    def setUpClass(cls):
+        connection.disable_constraint_checking()
+        super(TestMgmtCommands, cls).setUpClass()
+
+    @classmethod
+    def tearDownClass(cls):
+        super(TestMgmtCommands, cls).tearDownClass()
+        connection.enable_constraint_checking()
+
     def test_add_category_fields(self):
         management.call_command('add_category_fields', verbosity=0)
 
     def test_add_category_fields_app(self):
         management.call_command('add_category_fields', 'flatpages', verbosity=0)
 
-    @skip("Breaks with Django > 2. Skipping until it can be fixed.")
     def test_drop_category_field(self):
         management.call_command('drop_category_field', 'flatpages', 'flatpage', 'category', verbosity=0)