diff --git a/tests/__init__.py b/tests/__init__.py
index e8604144ae..82616d6961 100644
--- a/tests/__init__.py
+++ b/tests/__init__.py
@@ -2,7 +2,8 @@
 # this repository contains the full copyright notices and license terms.
 
 try:
-    from trytond.modules.account_invoice.tests.test_account_invoice import suite
+    from trytond.modules.account_invoice.tests.test_account_invoice import (
+        suite, set_invoice_sequences)
 except ImportError:
     from .test_account_invoice import suite, set_invoice_sequences