diff --git a/test/functional/rpc_psbt.py b/test/functional/rpc_psbt.py
index 5e89ad9f5e0eee..7a4cf42b2d4cff 100755
--- a/test/functional/rpc_psbt.py
+++ b/test/functional/rpc_psbt.py
@@ -7,7 +7,7 @@
 
 from decimal import Decimal
 from test_framework.test_framework import BitcoinTestFramework
-from test_framework.util import assert_equal, assert_raises_rpc_error, connect_nodes_bi, disconnect_nodes, find_output, sync_blocks
+from test_framework.util import assert_equal, assert_greater_than, assert_raises_rpc_error, connect_nodes_bi, disconnect_nodes, find_output, sync_blocks
 
 import json
 import os
@@ -22,7 +22,7 @@ def set_test_params(self):
         self.num_nodes = 3
         self.extra_args = [
             ["-walletrbf=1"],
-            [],
+            ["-walletrbf=0"],
             []
         ]
 
@@ -199,7 +199,7 @@ def run_test(self):
         psbtx_info = self.nodes[0].walletcreatefundedpsbt([{"txid":unspent["txid"], "vout":unspent["vout"]}], [{self.nodes[2].getnewaddress():unspent["amount"]+1}], block_height+2, {"replaceable":False}, False)
         decoded_psbt = self.nodes[0].decodepsbt(psbtx_info["psbt"])
         for tx_in, psbt_in in zip(decoded_psbt["tx"]["vin"], decoded_psbt["inputs"]):
-            assert(tx_in["sequence"] > MAX_BIP125_RBF_SEQUENCE)
+            assert_greater_than(tx_in["sequence"], MAX_BIP125_RBF_SEQUENCE)
             assert "bip32_derivs" not in psbt_in
         assert_equal(decoded_psbt["tx"]["locktime"], block_height+2)
 
@@ -218,6 +218,13 @@ def run_test(self):
             assert_equal(tx_in["sequence"], MAX_BIP125_RBF_SEQUENCE)
         assert_equal(decoded_psbt["tx"]["locktime"], 0)
 
+        # Same construction without optional arguments, for a node with -walletrbf=0
+        unspent1 = self.nodes[1].listunspent()[0]
+        psbtx_info = self.nodes[1].walletcreatefundedpsbt([{"txid":unspent1["txid"], "vout":unspent1["vout"]}], [{self.nodes[2].getnewaddress():unspent1["amount"]+1}], block_height)
+        decoded_psbt = self.nodes[1].decodepsbt(psbtx_info["psbt"])
+        for tx_in in decoded_psbt["tx"]["vin"]:
+            assert_greater_than(tx_in["sequence"], MAX_BIP125_RBF_SEQUENCE)
+
         # Make sure change address wallet does not have P2SH innerscript access to results in success
         # when attempting BnB coin selection
         self.nodes[0].walletcreatefundedpsbt([], [{self.nodes[2].getnewaddress():unspent["amount"]+1}], block_height+2, {"changeAddress":self.nodes[1].getnewaddress()}, False)