diff --git a/tests/test_account_invoice_history.py b/tests/test_account_invoice_history.py
index 7d957676ad..da95f3ac4c 100644
--- a/tests/test_account_invoice_history.py
+++ b/tests/test_account_invoice_history.py
@@ -1,31 +1,18 @@
-#!/usr/bin/env python
 #This file is part of Tryton.  The COPYRIGHT file at the top level of
 #this repository contains the full copyright notices and license terms.
-
-import sys
-import os
-DIR = os.path.abspath(os.path.normpath(os.path.join(__file__,
-    '..', '..', '..', '..', '..', 'trytond')))
-if os.path.isdir(DIR):
-    sys.path.insert(0, os.path.dirname(DIR))
-
 import unittest
 import trytond.tests.test_tryton
 from trytond.tests.test_tryton import test_depends
 
 
 class AccountInvoiceHistoryTestCase(unittest.TestCase):
-    '''
-    Test AccountInvoiceHistory module.
-    '''
+    'Test AccountInvoiceHistory module'
 
     def setUp(self):
         trytond.tests.test_tryton.install_module('account_invoice_history')
 
     def test0006depends(self):
-        '''
-        Test depends.
-        '''
+        'Test depends'
         test_depends()
 
 
@@ -34,6 +21,3 @@ def suite():
     suite.addTests(unittest.TestLoader().loadTestsFromTestCase(
         AccountInvoiceHistoryTestCase))
     return suite
-
-if __name__ == '__main__':
-    unittest.TextTestRunner(verbosity=2).run(suite())