def METHOD_NAME(self):
    self.assertEqual(
        self.pathfix(
            '#! /usr/bin/env python -R',
            ['-i', '/usr/bin/python3', '-k']),
        '#! /usr/bin/python3 -R')
    self.assertEqual(
        self.pathfix(
            '#! /usr/bin/env python',
            ['-i', '/usr/bin/python3', '-k']),
        '#! /usr/bin/python3')