diff --git a/trytond/trytond/tests/test_modelsql.py b/trytond/trytond/tests/test_modelsql.py
index a9169c3b6a..bf7cac2a1e 100644
--- a/trytond/trytond/tests/test_modelsql.py
+++ b/trytond/trytond/tests/test_modelsql.py
@@ -1323,6 +1323,7 @@ class TranslationTestCase(unittest.TestCase):
     @classmethod
     def setUpClass(cls):
         super().setUpClass()
+        activate_module('tests')
         cls.setup_language()
 
     @classmethod
@@ -1379,7 +1380,6 @@ class ModelSQLTranslationTestCase(TranslationTestCase):
     @classmethod
     def setUpClass(cls):
         super().setUpClass()
-        activate_module('tests')
 
     @with_transaction()
     def test_create_default_language(self):