    def test_it_validates_using_draft4_when_specified(self):
        """
        Specifically, `const` validation *does not* apply for Draft 4.
        """
        schema = """
            {
                "$schema": "http://json-schema.org/draft-04/schema#",
                "const": "check"
            }
            """
        instance = '"foo"'
        self.assertOutputs(
            files=dict(some_schema=schema, some_instance=instance),
            argv=["-i", "some_instance", "some_schema"],
            stdout="",
            stderr="",
        )
Specifically, `const` validation *does not* apply for Draft 4.
jsonschema/tests/test_cli.py