setup.py

from setuptools import setup, find_packages, Command

VERSION = __import__("bifrost").__version__

class PyTest(Command):
    user_options = []
    def initialize_options(self):
        pass
    def finalize_options(self):
        pass
    def run(self):
        import sys,subprocess
        errno = subprocess.call([sys.executable, 'runtests.py'])
        raise SystemExit(errno)

install_requires = [
    "tnetstring==0.2.0",
]

setup(
    name="bifrost",
    author="Curt Micol",
    author_email="asenchi@asenchi.com",
    version=VERSION,
    description="Gossip protocol layer.",
    packages=find_packages(),
    license="MIT",
    url="https://github.com/asenchi/bifrost",
    install_requires=install_requires,
    cmdclass={'test': PyTest},
    classifiers=[
      "Development Status :: 2 - Pre-Alpha",
      "Intended Audience :: Developers",
      "License :: OSI Approved :: MIT License",
      "Topic :: Software Development :: Libraries :: Application Frameworks",
      "Programming Language :: Python :: 2.6",
      "Programming Language :: Python :: 2.7",
      "Programming Language :: Python :: 3",
    ],
)

tox.ini

[tox]
envlist = py27

[pytest]
addopts = -v --maxfail=2
norecursedirs = .git _build tmp*

[testenv]
changedir = tests
deps = pytest
commands =
    python setup.py test

tox.log

_________________________________ [tox sdist] __________________________________
[TOX] ***creating sdist package
[TOX] /Users/asenchi/Projects/bifrost$ /Users/asenchi/.virtualenvs/bifrost/bin/python setup.py sdist --formats=zip --dist-dir .tox/dist >.tox/log/0.log
[TOX] ***copying new sdistfile to '/Users/asenchi/.tox/distshare/bifrost-0.1a1.zip'
______________________________ [tox testenv:py27] ______________________________
[TOX] ***creating virtualenv py27
[TOX] /Users/asenchi/Projects/bifrost/.tox$ virtualenv --distribute --no-site-packages -p /Users/asenchi/Developer/Cellar/python/2.7.1/bin/python2.7 py27 >py27/log/0.log
[TOX] ***installing dependencies: pytest
[TOX] /Users/asenchi/Projects/bifrost/.tox/py27/log$ ../bin/pip install --download-cache=/Users/asenchi/Projects/bifrost/.tox/_download pytest >1.log
[TOX] /Users/asenchi/Projects/bifrost/.tox/py27/log$ ../bin/pip install --download-cache=/Users/asenchi/Projects/bifrost/.tox/_download ../../dist/bifrost-0.1a1.zip >2.log
[TOX] /Users/asenchi/Projects/bifrost/tests$ ../.tox/py27/bin/python setup.py test
________________________________ [tox summary] _________________________________
[TOX] ERROR: py27: commands failed