diff --git a/test/functional/abc_p2p_avalanche_peer_discovery.py b/test/functional/abc_p2p_avalanche_peer_discovery.py
--- a/test/functional/abc_p2p_avalanche_peer_discovery.py
+++ b/test/functional/abc_p2p_avalanche_peer_discovery.py
@@ -139,7 +139,7 @@
         bad_interface = get_ava_p2p_interface(node)
         wrong_key = ECKey()
         wrong_key.generate()
-        with self.nodes[0].assert_debug_log(
+        with node.assert_debug_log(
                 ["Misbehaving",
                  "peer=1 (0 -> 100) BAN THRESHOLD EXCEEDED: invalid-avahello-signature"]):
             bad_interface.send_avahello(interface_delegation_hex, wrong_key)
diff --git a/test/functional/abc_p2p_avalanche_voting.py b/test/functional/abc_p2p_avalanche_voting.py
--- a/test/functional/abc_p2p_avalanche_voting.py
+++ b/test/functional/abc_p2p_avalanche_voting.py
@@ -242,7 +242,7 @@
 
         self.log.info(
             "Check the node is discouraging unexpected avaresponses.")
-        with self.nodes[0].assert_debug_log(
+        with node.assert_debug_log(
                 ['Misbehaving', 'peer=1 (0 -> 2): unexpected-ava-response']):
             # unknown voting round
             poll_node.send_avaresponse(
diff --git a/test/functional/abc_p2p_proof_inventory.py b/test/functional/abc_p2p_proof_inventory.py
--- a/test/functional/abc_p2p_proof_inventory.py
+++ b/test/functional/abc_p2p_proof_inventory.py
@@ -268,7 +268,7 @@
             }],
             outputs={ADDRESS_BCHREG_UNSPENDABLE: 25_000_000 - 250.00},
         )
-        signed_tx = self.nodes[0].signrawtransactionwithkey(
+        signed_tx = node.signrawtransactionwithkey(
             hexstring=raw_tx,
             privkeys=[node.get_deterministic_priv_key().key],
         )