diff --git a/src/allmydata/test/cli/test_invite.py b/src/allmydata/test/cli/test_invite.py
index 452acbc9c..36021af13 100644
--- a/src/allmydata/test/cli/test_invite.py
+++ b/src/allmydata/test/cli/test_invite.py
@@ -1,4 +1,14 @@
-from past.builtins import unicode
+"""
+Ported to Pythn 3.
+"""
+from __future__ import absolute_import
+from __future__ import division
+from __future__ import print_function
+from __future__ import unicode_literals
+
+from future.utils import PY2
+if PY2:
+    from future.builtins import filter, map, zip, ascii, chr, hex, input, next, oct, open, pow, round, super, bytes, dict, list, object, range, str, max, min  # noqa: F401
 
 import os
 import mock
@@ -51,7 +61,7 @@ class _FakeWormhole(object):
 
 def _create_fake_wormhole(outgoing_messages):
     outgoing_messages = [
-        m.encode("utf-8") if isinstance(m, unicode) else m
+        m.encode("utf-8") if isinstance(m, str) else m
         for m in outgoing_messages
     ]
     return _FakeWormhole(outgoing_messages)
diff --git a/src/allmydata/util/_python3.py b/src/allmydata/util/_python3.py
index 8cf6a61b3..5a29020b8 100644
--- a/src/allmydata/util/_python3.py
+++ b/src/allmydata/util/_python3.py
@@ -145,6 +145,7 @@ PORTED_MODULES = [
 PORTED_TEST_MODULES = [
     "allmydata.test.cli.test_alias",
     "allmydata.test.cli.test_create",
+    "allmydata.test.cli.test_invite",
     "allmydata.test.cli.test_status",
 
     "allmydata.test.mutable.test_checker",