diff --git a/tests/test_emails.py b/tests/test_emails.py
index 02983eb..ab70a25 100644
--- a/tests/test_emails.py
+++ b/tests/test_emails.py
@@ -11,6 +11,7 @@ import socket
 import threading
 
 from django.core.exceptions import ValidationError
+from django.utils import six
 from django.utils.encoding import force_text
 
 from hobo.emails.validators import validate_email_address
@@ -46,8 +47,12 @@ def dns_resolver(monkeypatch):
 def smtp_server(monkeypatch):
     class RecipientValidatingSMTPChannel(smtpd.SMTPChannel):
         def smtp_RCPT(self, arg):
-            address = self._SMTPChannel__getaddr('TO:', arg)
-            domain = address.split('@')[-1]
+            if six.PY2:
+                address = self._SMTPChannel__getaddr('TO:', arg)
+                domain = address.split('@')[-1]
+            else:
+                address = self._getaddr(arg)
+                domain = address[1].split('@')[-1][:-1]
             if domain in ('example.com', 'example-spf.com', 'example-spf-allow-all.com', 'example-invalid-spf.com'):
                 self._SMTPChannel__rcpttos.append(address)
                 self.push('250 Ok')