Sign outgoing PDUs.

1 files changed, 2 insertions, 1 deletions

diff --git a/tests/utils.py b/tests/utils.py

index 60fd6085ac..d8be73dba8 100644
--- a/tests/utils.py
+++ b/tests/utils.py
@@ -118,13 +118,14 @@ class MockHttpResource(HttpServer):
 class MockKey(object):
     alg = "mock_alg"
     version = "mock_version"
+    signature = b"\x9a\x87$"
 
     @property
     def verify_key(self):
         return self
 
     def sign(self, message):
-        return b"\x9a\x87$"
+        return self
 
     def verify(self, message, sig):
         assert sig == b"\x9a\x87$"