One final test module to port to Python 3 (nominally).

src/allmydata/test/test_python2_regressions.py

@@ -2,6 +2,16 @@
 Tests to check for Python2 regressions
 """
 
+from __future__ import unicode_literals
+from __future__ import absolute_import
+from __future__ import division
+from __future__ import print_function
+
+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
+
+from unittest import skipUnless
 from inspect import isclass
 
 from twisted.python.modules import getModule
@@ -37,10 +47,12 @@ def defined_here(cls, where):
     """
     return cls.__module__ == where
 
+
 class PythonTwoRegressions(TestCase):
     """
     Regression tests for Python 2 behaviors related to Python 3 porting.
     """
+    @skipUnless(PY2, "No point in running on Python 3.")
     def test_new_style_classes(self):
         """
         All classes in Tahoe-LAFS are new-style.

src/allmydata/util/_python3.py

@@ -240,6 +240,7 @@ PORTED_TEST_MODULES = [
     "allmydata.test.test_node",
     "allmydata.test.test_observer",
     "allmydata.test.test_pipeline",
+    "allmydata.test.test_python2_regressions",
     "allmydata.test.test_python3",
     "allmydata.test.test_repairer",
     "allmydata.test.test_runner",