def METHOD_NAME(self, get_proxy: MagicMock, RequestParser: MagicMock) -> None:
    input_data = [
        json.dumps({
            'anykey1': 'anyval1'
        }),
        json.dumps({
            'anykey2': 'anyval2'
        })
    ]
    RequestParser().parse_args.return_value = dict(data=input_data, index='fake_index')
    with self.assertRaises(ValidationError):
        DocumentTablesAPI().put()