diff --git a/modoboa/core/tests/test_core.py b/modoboa/core/tests/test_core.py
index c722432da..6e316db47 100644
--- a/modoboa/core/tests/test_core.py
+++ b/modoboa/core/tests/test_core.py
@@ -289,4 +289,6 @@ class APICommunicationTestCase(ModoTestCase):
                 mocks.modo_api_instance_update,
                 mocks.modo_api_versions_no_update):
             management.call_command("communicate_with_public_api")
+        for mails in mail.outbox:
+            print(mails.body)
         self.assertEqual(len(mail.outbox), 1)