def test_pythonpath(self):
        target_path = FilePath(self.mktemp())
        create_virtualenv(root=target_path)
        output = check_output([
            target_path.descendant(['bin', 'python']).path,
            '-c', r'import sys; sys.stdout.write("\n".join(sys.path))'
        ])
        # We should probably check for lib64 as well here.
        self.assertNotIn(
            '/usr/lib/python2.7/site-packages', output.splitlines())
``create_virtualenv`` installs a virtual python whose path does not
dataset/ETHPy150Open ClusterHQ/flocker/admin/test/test_packaging.py/CreateVirtualenvTests.test_pythonpath