diff --git a/tests/test_proto.py b/tests/test_proto.py
index 8031222..1e4df3b 100644
--- a/tests/test_proto.py
+++ b/tests/test_proto.py
@@ -137,7 +137,7 @@ class TestPacket(TestCase):
         self.packet = Packet(
             random_request_id(),
             Type.SERVERDATA_EXECCOMMAND,
-            'Lorem ipsum sit amet...'
+            'Lorem ipsum sit amet...'.encode()
         )
 
     def test_bytes_rw(self):