pytest-xdist with Buildout on Python 3

gistfile1.txt

buildout.cfg:

[py]
recipe = zc.recipe.egg
...
interpreter = py
initialization =
    import sys, os

    try:
        if '-u' in sys.argv:
            class Unbuffered(object):
                def __init__(self, stream):
                    self.stream = stream
                def write(self, data):
                    self.stream.write(data)
                    self.stream.flush()
                def __getattr__(self, attr):
                    return getattr(self.stream, attr)

            sys.stdout = Unbuffered(sys.stdout)
            sys.argv.remove('-u')
    except ValueError:
        pass


Run tests:

bin/py.test --tx='2*popen//python=bin/py' --dist=load