def set_test_params(self):
        self.num_nodes = 2
        # We lower the various required feerates for this test
        # to catch a corner-case where feefilter used to slightly undercut
        # mempool and wallet feerate calculation based on GetFee
        # rounding down 3 places, leading to stranded transactions.
        # See issue #16499
        self.extra_args = [["-minrelaytxfee=0.00000100", "-mintxfee=0.00000100"]]*self.num_nodes