def test_sysfind_no_permisson(self):

       dir = py.test.ensuretemp('sysfind') 

       env = py.std.os.environ

       oldpath = env['PATH']

       try:

           noperm = dir.ensure('noperm', dir=True)

           env['PATH'] += ":%s" % (noperm)

           noperm.chmod(0)

           assert py.path.local.sysfind('a') is None

       finally:

           env['PATH'] = oldpath

           noperm.chmod(0644)

->         noperm.remove()