The second method I added.

test_version.py

class VersionCommandTestCase(CommandBaseTestCase):
    def test_has_version(self):
        result = self.run_command(['--version'])
        self.assertThat(result.exit_code, Equals(0))

    def test_has_version_without_hyphens(self):
        result = self.run_command(['version'])
        print(result.output)
        self.assertThat(result.exit_code, Equals(0))