diff --git a/tests/__init__.py b/tests/__init__.py
index d0a1c0e888..f050999e72 100644
--- a/tests/__init__.py
+++ b/tests/__init__.py
@@ -2,3 +2,5 @@
 #repository contains the full copyright notices and license terms.
 
 from .test_sale_invoice_grouping import suite
+
+__all__ = ['suite']