3 files changed, 9 insertions, 10 deletions
diff --git a/src/mailman/testing/helpers.py b/src/mailman/testing/helpers.py
index b0fe14a0d..1de0e98cf 100644
--- a/src/mailman/testing/helpers.py
+++ b/src/mailman/testing/helpers.py
@@ -59,8 +59,8 @@ from contextlib import contextmanager
 from email import message_from_string
 from httplib2 import Http
 from lazr.config import as_timedelta
-from urllib import urlencode
-from urllib2 import HTTPError
+from six.moves.urllib_error import HTTPError
+from six.moves.urllib_parse import urlencode
 from zope import event
 from zope.component import getUtility
 
@@ -342,7 +342,7 @@ def call_api(url, data=None, method=None, username=None, password=None):
     if len(content) == 0:
         return None, response
     # XXX Workaround http://bugs.python.org/issue10038
-    content = unicode(content)
+    content = content.decode('utf-8')
     return json.loads(content), response
 
 
@@ -506,9 +506,8 @@ def specialized_message_from_string(unicode_text):
     """
     # This mimic what Switchboard.dequeue() does when parsing a message from
     # text into a Message instance.
-    text = unicode_text.encode('ascii')
-    original_size = len(text)
-    message = message_from_string(text, Message)
+    original_size = len(unicode_text)
+    message = message_from_string(unicode_text, Message)
     message.original_size = original_size
     return message
 
diff --git a/src/mailman/testing/layers.py b/src/mailman/testing/layers.py
index 74ad99dc8..8ec6c307f 100644
--- a/src/mailman/testing/layers.py
+++ b/src/mailman/testing/layers.py
@@ -46,7 +46,7 @@ import datetime
 import tempfile
 
 from lazr.config import as_boolean
-from pkg_resources import resource_string
+from pkg_resources import resource_string as resource_bytes
 from textwrap import dedent
 from zope.component import getUtility
 
@@ -132,7 +132,8 @@ class ConfigLayer(MockAndMonkeyLayer):
         configuration: {1}
         """.format(cls.var_dir, postfix_cfg))
         # Read the testing config and push it.
-        test_config += resource_string('mailman.testing', 'testing.cfg')
+        more = resource_bytes('mailman.testing', 'testing.cfg')
+        test_config += more.decode('utf-8')
         config.create_paths = True
         config.push('test config', test_config)
         # Initialize everything else.
diff --git a/src/mailman/testing/mta.py b/src/mailman/testing/mta.py
index 875647485..234540e98 100644
--- a/src/mailman/testing/mta.py
+++ b/src/mailman/testing/mta.py
@@ -27,10 +27,9 @@ __all__ = [
 
 import logging
 
-from Queue import Empty, Queue
-
 from lazr.smtptest.controller import QueueController
 from lazr.smtptest.server import Channel, QueueServer
+from six.moves.queue import Empty, Queue
 from zope.interface import implementer
 
 from mailman.interfaces.mta import IMailTransportAgentLifecycle