The change seems to be causing some Windows buildbot failures <http://buildbot.python.org/all/builders/AMD64%20Windows7%20SP1%203.5/builds/666/steps/test/logs/stdio>:

======================================================================
ERROR: test_walk_bad_dir (test.test_os.BytesWalkTests)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "C:\buildbot.python.org\3.5.kloth-win64\build\lib\test\test_os.py", line 931, in test_walk_bad_dir
    root, dirs, files = next(walk_it)
  File "C:\buildbot.python.org\3.5.kloth-win64\build\lib\test\test_os.py", line 1027, in walk
    for broot, bdirs, bfiles in os.walk(os.fsencode(top), **kwargs):
  File "C:\buildbot.python.org\3.5.kloth-win64\build\lib\os.py", line 372, in walk
    entries = list(scandir(top))
TypeError: os.scandir() doesn't support bytes path on Windows, use Unicode instead

======================================================================
ERROR: test_walk_bottom_up (test.test_os.BytesWalkTests)
ERROR: test_walk_prune (test.test_os.BytesWalkTests)

Was this line

entries = list(scandir(top))

meant to be

entries = list(scandir_it)