diff --git a/addons/mass_mailing/wizard/test_mailing.py b/addons/mass_mailing/wizard/test_mailing.py
index 80b84de3deb..20c57f80609 100644
--- a/addons/mass_mailing/wizard/test_mailing.py
+++ b/addons/mass_mailing/wizard/test_mailing.py
@@ -33,6 +33,7 @@ class TestMassMailing(osv.TransientModel):
                     'body_html': '',
                     'notification': True,
                     'mailing_id': mailing.id,
+                    'attachment_ids': [(4, attachment.id) for attachment in mailing.attachment_ids],
                 }
                 mail_mail_obj = Mail.browse(cr, uid, Mail.create(cr, uid, mail_values, context=context), context=context)
                 unsubscribe_url = Mail._get_unsubscribe_url(cr, uid, mail_mail_obj, test_mail, context=context)