def set_test_params(self):
        self.num_nodes = 1
        self.setup_clean_chain = True
        # This script tests NULLDUMMY activation, which is part of the 'segwit' deployment, so we go through
        # normal segwit activation here (and don't use the default always-on behaviour).
        self.extra_args = [[
            f'-segwitheight={COINBASE_MATURITY + 5}',
            '-addresstype=legacy',
        ]]