diff --git a/__init__.py b/__init__.py
index 907d04b850..5a01bfc8f1 100644
--- a/__init__.py
+++ b/__init__.py
@@ -1,5 +1,5 @@
 #This file is part of Tryton.  The COPYRIGHT file at the top level of
 #this repository contains the full copyright notices and license terms.
 
-from purchase import *
-from invoice import *
+from .purchase import *
+from .invoice import *
diff --git a/tests/__init__.py b/tests/__init__.py
index e703636f02..b1fbc5724f 100644
--- a/tests/__init__.py
+++ b/tests/__init__.py
@@ -1,4 +1,4 @@
 #This file is part of Tryton.  The COPYRIGHT file at the top level of
 #this repository contains the full copyright notices and license terms.
 
-from test_purchase_invoice_line_standalone import suite
+from .test_purchase_invoice_line_standalone import suite