diff --git a/src/tests/test_api.py b/src/tests/test_api.py
index ba197127..64f3fdbe 100644
--- a/src/tests/test_api.py
+++ b/src/tests/test_api.py
@@ -103,6 +103,7 @@ class TestAPI(TestAPIProto):
             len(json.loads(
                 self.api.getAllInboxMessages())["inboxMessages"]),
             4,
+            # Custom AssertError message for details
             json.loads(self.api.getAllInboxMessages())["inboxMessages"]
         )
         self.assertEqual(