diff --git a/src/Test/TestMsgpack.py b/src/Test/TestMsgpack.py
index 753e2365..abbdaade 100644
--- a/src/Test/TestMsgpack.py
+++ b/src/Test/TestMsgpack.py
@@ -27,7 +27,7 @@ class TestMsgpack:
 
         messages = []
         for char in data:
-            unpacker.feed(char)
+            unpacker.feed(bytes([char]))
             for message in unpacker:
                 messages.append(message)