diff --git a/tests/test_module.py b/tests/test_module.py
index a7cd077..c408be5 100644
--- a/tests/test_module.py
+++ b/tests/test_module.py
@@ -3,18 +3,27 @@
 # The COPYRIGHT file at the top level of this repository contains the
 # full copyright notices and license terms.
 
-from trytond.modules.cashbook.tests.test_module import CashbookTestCase
+from trytond.tests.test_tryton import activate_module
+from trytond.modules.cashbook_investment.tests.test_module import \
+    CashbookInvestmentTestCase
 from .planner import PlannerTestCase
 
 
 class CashbookPlannerTestCase(
         PlannerTestCase,
-        CashbookTestCase):
-    """ run all test from 'cashbook', add test for planner
+        CashbookInvestmentTestCase):
+    """ run all test from 'cashbook_investment', add test for planner
     """
     module = 'cashbook_planner'
 
+    @classmethod
+    def setUpClass(cls):
+        """ activate modules
+        """
+        super(CashbookPlannerTestCase, cls).setUpClass()
+        activate_module(['cashbook_investment'])
+
 # end CashbookPlannerTestCase
 
 
-del CashbookTestCase
+del CashbookInvestmentTestCase