$ python setup.py test --addopts='-k environment_with_spaces' ... ====================================== test session starts ======================================= platform darwin -- Python 3.4.3 -- py-1.4.28 -- pytest-2.6.4 collected 128 items / 2 skipped setuptools/tests/test_easy_install.py F >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> traceback >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> self = <setuptools.tests.test_easy_install.TestCommandSpec object at 0x1048f3e80> def test_from_environment_with_spaces_in_executable(self): with mock.patch('sys.executable', TestScriptHeader.exe_with_spaces): cmd = ei.CommandSpec.from_environment() assert len(cmd) == 1 > assert cmd.as_header().startswith('#!"') E assert <built-in method startswith of str object at 0x1048f74e0>('#!"') E + where <built-in method startswith of str object at 0x1048f74e0> = '#!/Library/Frameworks/Python.framework/Versions/3.4/bin/python3\n'.startswith E + where '#!/Library/Frameworks/Python.framework/Versions/3.4/bin/python3\n' = <bound method CommandSpec.as_header of ['/Library/Frameworks/Python.framework/Versions/3.4/bin/python3']>() E + where <bound method CommandSpec.as_header of ['/Library/Frameworks/Python.framework/Versions/3.4/bin/python3']> = ['/Library/Frameworks/Python.framework/Versions/3.4/bin/python3'].as_header setuptools/tests/test_easy_install.py:495: AssertionError