diff --git a/tests/__init__.py b/tests/__init__.py
index cc2ec58..a087600 100644
--- a/tests/__init__.py
+++ b/tests/__init__.py
@@ -3,3 +3,5 @@
 # the full copyright notices and license terms.
 
 from .test_account_payment_es_csb_32 import suite
+
+__all__ = ['suite']