diff --git a/test/functional/interface_usdt_utxocache.py b/test/functional/interface_usdt_utxocache.py
--- a/test/functional/interface_usdt_utxocache.py
+++ b/test/functional/interface_usdt_utxocache.py
@@ -186,7 +186,7 @@
         # Create a transaction and invalidate it by changing the txid of the previous
         # output to the coinbase txid of the block at height 1.
         invalid_tx = self.wallet.create_self_transfer(from_node=self.nodes[0])["tx"]
-        invalid_tx.vin[0].prevout.hash = int(block_1_coinbase_txid, 16)
+        invalid_tx.vin[0].prevout.txid = int(block_1_coinbase_txid, 16)
 
         self.log.info("hooking into the utxocache:uncache tracepoint")
         ctx = USDT(pid=self.nodes[0].process.pid)