1 files changed, 3 insertions, 4 deletions

diff --git a/src/mailman/testing/mta.py b/src/mailman/testing/mta.py
index 4699cb882..bba450352 100644
--- a/src/mailman/testing/mta.py
+++ b/src/mailman/testing/mta.py
@@ -17,7 +17,7 @@
 
 """Fake MTA for testing purposes."""
 
-from __future__ import absolute_import, unicode_literals
+from __future__ import absolute_import, print_function, unicode_literals
 
 __metaclass__ = type
 __all__ = [
@@ -31,7 +31,7 @@ from Queue import Empty, Queue
 
 from lazr.smtptest.controller import QueueController
 from lazr.smtptest.server import Channel, QueueServer
-from zope.interface import implements
+from zope.interface import implementer
 
 from mailman.interfaces.mta import IMailTransportAgentLifecycle
 
@@ -40,11 +40,10 @@ log = logging.getLogger('lazr.smtptest')
 
 
 
+@implementer(IMailTransportAgentLifecycle)
 class FakeMTA:
     """Fake MTA for testing purposes."""
 
-    implements(IMailTransportAgentLifecycle)
-
     def create(self, mlist):
         pass