diff --git a/test/functional/rpc_psbt.py b/test/functional/rpc_psbt.py
index 8f672f2307..deb519803c 100755
--- a/test/functional/rpc_psbt.py
+++ b/test/functional/rpc_psbt.py
@@ -111,7 +111,7 @@ class PSBTTest(BitcoinTestFramework):
         # Mine a transaction that credits the offline address
         offline_addr = offline_node.getnewaddress(address_type="bech32m")
         online_addr = w2.getnewaddress(address_type="bech32m")
-        wonline.importaddress(offline_addr, "", False)
+        wonline.importaddress(offline_addr, label="", rescan=False)
         mining_wallet = mining_node.get_wallet_rpc(self.default_wallet_name)
         mining_wallet.sendtoaddress(address=offline_addr, amount=1.0)
         self.generate(mining_node, nblocks=1, sync_fun=lambda: self.sync_all([online_node, mining_node]))
@@ -312,9 +312,9 @@ class PSBTTest(BitcoinTestFramework):
         wmulti = self.nodes[2].get_wallet_rpc('wmulti')
 
         # Create all the addresses
-        p2sh = wmulti.addmultisigaddress(2, [pubkey0, pubkey1, pubkey2], "", "legacy")['address']
-        p2wsh = wmulti.addmultisigaddress(2, [pubkey0, pubkey1, pubkey2], "", "bech32")['address']
-        p2sh_p2wsh = wmulti.addmultisigaddress(2, [pubkey0, pubkey1, pubkey2], "", "p2sh-segwit")['address']
+        p2sh = wmulti.addmultisigaddress(2, [pubkey0, pubkey1, pubkey2], label="", address_type="legacy")["address"]
+        p2wsh = wmulti.addmultisigaddress(2, [pubkey0, pubkey1, pubkey2], label="", address_type="bech32")["address"]
+        p2sh_p2wsh = wmulti.addmultisigaddress(2, [pubkey0, pubkey1, pubkey2], label="", address_type="p2sh-segwit")["address"]
         p2wpkh = self.nodes[1].getnewaddress("", "bech32")
         p2pkh = self.nodes[1].getnewaddress("", "legacy")
         p2sh_p2wpkh = self.nodes[1].getnewaddress("", "p2sh-segwit")
diff --git a/test/functional/test_framework/test_node.py b/test/functional/test_framework/test_node.py
index 30b9c37be4..9f0baaccca 100755
--- a/test/functional/test_framework/test_node.py
+++ b/test/functional/test_framework/test_node.py
@@ -931,7 +931,7 @@ class RPCOverloadWrapper():
     def __getattr__(self, name):
         return getattr(self.rpc, name)
 
-    def importprivkey(self, privkey, label=None, rescan=None):
+    def importprivkey(self, privkey, *, label=None, rescan=None):
         wallet_info = self.getwalletinfo()
         if 'descriptors' not in wallet_info or ('descriptors' in wallet_info and not wallet_info['descriptors']):
             return self.__getattr__('importprivkey')(privkey, label, rescan)
@@ -939,13 +939,13 @@ class RPCOverloadWrapper():
         req = [{
             'desc': desc,
             'timestamp': 0 if rescan else 'now',
-            'label': label if label else ''
+            'label': label if label else '',
         }]
         import_res = self.importdescriptors(req)
         if not import_res[0]['success']:
             raise JSONRPCException(import_res[0]['error'])
 
-    def addmultisigaddress(self, nrequired, keys, label=None, address_type=None):
+    def addmultisigaddress(self, nrequired, keys, *, label=None, address_type=None):
         wallet_info = self.getwalletinfo()
         if 'descriptors' not in wallet_info or ('descriptors' in wallet_info and not wallet_info['descriptors']):
             return self.__getattr__('addmultisigaddress')(nrequired, keys, label, address_type)
@@ -953,14 +953,14 @@ class RPCOverloadWrapper():
         req = [{
             'desc': cms['descriptor'],
             'timestamp': 0,
-            'label': label if label else ''
+            'label': label if label else '',
         }]
         import_res = self.importdescriptors(req)
         if not import_res[0]['success']:
             raise JSONRPCException(import_res[0]['error'])
         return cms
 
-    def importpubkey(self, pubkey, label=None, rescan=None):
+    def importpubkey(self, pubkey, *, label=None, rescan=None):
         wallet_info = self.getwalletinfo()
         if 'descriptors' not in wallet_info or ('descriptors' in wallet_info and not wallet_info['descriptors']):
             return self.__getattr__('importpubkey')(pubkey, label, rescan)
@@ -968,13 +968,13 @@ class RPCOverloadWrapper():
         req = [{
             'desc': desc,
             'timestamp': 0 if rescan else 'now',
-            'label': label if label else ''
+            'label': label if label else '',
         }]
         import_res = self.importdescriptors(req)
         if not import_res[0]['success']:
             raise JSONRPCException(import_res[0]['error'])
 
-    def importaddress(self, address, label=None, rescan=None, p2sh=None):
+    def importaddress(self, address, *, label=None, rescan=None, p2sh=None):
         wallet_info = self.getwalletinfo()
         if 'descriptors' not in wallet_info or ('descriptors' in wallet_info and not wallet_info['descriptors']):
             return self.__getattr__('importaddress')(address, label, rescan, p2sh)
@@ -988,13 +988,13 @@ class RPCOverloadWrapper():
         reqs = [{
             'desc': desc,
             'timestamp': 0 if rescan else 'now',
-            'label': label if label else ''
+            'label': label if label else '',
         }]
         if is_hex and p2sh:
             reqs.append({
                 'desc': descsum_create('p2sh(raw(' + address + '))'),
                 'timestamp': 0 if rescan else 'now',
-                'label': label if label else ''
+                'label': label if label else '',
             })
         import_res = self.importdescriptors(reqs)
         for res in import_res:
diff --git a/test/functional/wallet_address_types.py b/test/functional/wallet_address_types.py
index 27adb15595..d8c2aab36d 100755
--- a/test/functional/wallet_address_types.py
+++ b/test/functional/wallet_address_types.py
@@ -344,7 +344,7 @@ class AddressTypeTest(BitcoinTestFramework):
         self.test_address(3, self.nodes[3].getrawchangeaddress(), multisig=False, typ='bech32')
 
         self.log.info('test invalid address type arguments')
-        assert_raises_rpc_error(-5, "Unknown address type ''", self.nodes[3].addmultisigaddress, 2, [compressed_1, compressed_2], None, '')
+        assert_raises_rpc_error(-5, "Unknown address type ''", self.nodes[3].addmultisigaddress, 2, [compressed_1, compressed_2], address_type="")
         assert_raises_rpc_error(-5, "Unknown address type ''", self.nodes[3].getnewaddress, None, '')
         assert_raises_rpc_error(-5, "Unknown address type ''", self.nodes[3].getrawchangeaddress, '')
         assert_raises_rpc_error(-5, "Unknown address type 'bech23'", self.nodes[3].getrawchangeaddress, 'bech23')
diff --git a/test/functional/wallet_fundrawtransaction.py b/test/functional/wallet_fundrawtransaction.py
index 1339f9e28c..aeaa8e5462 100755
--- a/test/functional/wallet_fundrawtransaction.py
+++ b/test/functional/wallet_fundrawtransaction.py
@@ -192,7 +192,7 @@ class RawTransactionsTest(BitcoinTestFramework):
         watchonly_address = self.nodes[0].getnewaddress()
         watchonly_pubkey = self.nodes[0].getaddressinfo(watchonly_address)["pubkey"]
         self.watchonly_amount = Decimal(200)
-        wwatch.importpubkey(watchonly_pubkey, "", True)
+        wwatch.importpubkey(watchonly_pubkey, label="", rescan=True)
         self.watchonly_utxo = self.create_outpoints(self.nodes[0], outputs=[{watchonly_address: self.watchonly_amount}])[0]
 
         # Lock UTXO so nodes[0] doesn't accidentally spend it
diff --git a/test/functional/wallet_labels.py b/test/functional/wallet_labels.py
index fb26b87a64..800f3ad7c4 100755
--- a/test/functional/wallet_labels.py
+++ b/test/functional/wallet_labels.py
@@ -49,7 +49,7 @@ class WalletLabelsTest(BitcoinTestFramework):
         assert_equal(response[0]['error']['message'], "Invalid label name")
 
         for rpc_call in rpc_calls:
-            assert_raises_rpc_error(-11, "Invalid label name", *rpc_call, "*")
+            assert_raises_rpc_error(-11, "Invalid label name", *rpc_call, label="*")
 
     def run_test(self):
         # Check that there's no UTXO on the node