Forgot the @ in class decorator ;)

celery/canvas.py

@@ -467,7 +467,7 @@ class group(Signature):
         return repr(self.tasks)
 
 
-Signature.register_type
+@Signature.register_type
 class chord(Signature):
 
     def __init__(self, header, body=None, task='celery.chord',

celery/tests/compat_modules/test_messaging.py

@@ -6,13 +6,6 @@ from celery.tests.case import Case
 
 class test_compat_messaging_module(Case):
 
-    def test_with_connection(self):
-
-        def foo(**kwargs):
-            pass
-
-        self.assertTrue(messaging.with_connection(foo))
-
     def test_get_consume_set(self):
         conn = messaging.establish_connection()
         messaging.get_consumer_set(conn).close()