diff --git a/rhodecode/tests/test_validators.py b/rhodecode/tests/test_validators.py
--- a/rhodecode/tests/test_validators.py
+++ b/rhodecode/tests/test_validators.py
@@ -12,6 +12,9 @@ from rhodecode.model.repos_group import 
 from rhodecode.config.routing import ADMIN_PREFIX
 from rhodecode.model.db import ChangesetStatus, Repository
 from rhodecode.model.changeset_status import ChangesetStatusModel
+from rhodecode.tests.fixture import Fixture
+
+fixture = Fixture()
 
 
 class TestReposGroups(unittest.TestCase):
@@ -55,9 +58,9 @@ class TestReposGroups(unittest.TestCase)
         self.assertRaises(formencode.Invalid, validator.to_python, 'default')
         self.assertRaises(formencode.Invalid, validator.to_python, '.,')
 
-        gr = UserGroupModel().create('test')
-        gr2 = UserGroupModel().create('tes2')
-        Session.commit()
+        gr = fixture.create_user_group('test')
+        gr2 = fixture.create_user_group('tes2')
+        Session().commit()
         self.assertRaises(formencode.Invalid, validator.to_python, 'test')
         assert gr.users_group_id != None
         validator = v.ValidUserGroup(edit=True,
@@ -69,7 +72,7 @@ class TestReposGroups(unittest.TestCase)
         self.assertRaises(formencode.Invalid, validator.to_python, 'TEST')
         UserGroupModel().delete(gr)
         UserGroupModel().delete(gr2)
-        Session.commit()
+        Session().commit()
 
     def test_ValidReposGroup(self):
         validator = v.ValidReposGroup()