fix tests with ref using old binary format

        if add_option_list is not None:

            command.extend(add_option_list)

        # add to fix test failed to be removed after merge             

        if self._type == "REF":

            if '-hrtf' in command:

                command[command.index('-hrtf') + 1] = command[command.index('-hrtf') + 1] + "old" 

        # add mandatory parameters

        # output_config is mandatory for IVAS; EVS does not have this parameter, indicated by ""

        if output_config != "":