diff --git a/trytond/trytond/tests/test_modelsql.py b/trytond/trytond/tests/test_modelsql.py
index cbc48288c9..8b8d7bf5d5 100644
--- a/trytond/trytond/tests/test_modelsql.py
+++ b/trytond/trytond/tests/test_modelsql.py
@@ -1429,6 +1429,7 @@ class TranslationTestCase(TestCase):
     @classmethod
     def setUpClass(cls):
         super().setUpClass()
+        activate_module('tests')
         cls.setup_language()
 
     @classmethod
@@ -1485,7 +1486,6 @@ class ModelSQLTranslationTestCase(TranslationTestCase):
     @classmethod
     def setUpClass(cls):
         super().setUpClass()
-        activate_module('tests')
 
     @with_transaction()
     def test_create_default_language(self):