virtualenvでsys.stdout.encodingが狂う

27out.txt

None
cp932
今日は

32out-venv.txt

'ascii'
cp932

32out.txt

'cp932'
cp932
今日は

test.py

# -*- coding: utf-8 -*-
import sys, locale
print(repr(sys.stdout.encoding))
print((locale.getpreferredencoding()))
print('今日は')