diff --git a/rskj-core/src/test/java/co/rsk/peg/RegisterBtcTransactionIT.java b/rskj-core/src/test/java/co/rsk/peg/RegisterBtcTransactionIT.java
index a3d7bc04b7..42d39b761e 100644
--- a/rskj-core/src/test/java/co/rsk/peg/RegisterBtcTransactionIT.java
+++ b/rskj-core/src/test/java/co/rsk/peg/RegisterBtcTransactionIT.java
@@ -79,7 +79,7 @@ void setUp() throws Exception{
         rskReceiver = new RskAddress(ecKey.getAddress());
         bitcoinTransaction = createPegInTransaction(federationSupport.getActiveFederation().getAddress(), BTC_TRANSFERRED, btcPublicKey);
 
-        pmtWithTransactions = createValidPmtForTransactions(Collections.singletonList(bitcoinTransaction.getHash()), bridgeConstants.getBtcParams());
+        pmtWithTransactions = createValidPmtForTransactions(List.of(bitcoinTransaction.getHash()), bridgeConstants.getBtcParams());
         btcBlockWithPmtHeight = bridgeConstants.getBtcHeightWhenPegoutTxIndexActivates() + bridgeConstants.getPegoutTxIndexGracePeriodInBtcBlocks();
         int chainHeight = btcBlockWithPmtHeight + bridgeConstants.getBtc2RskMinimumAcceptableConfirmations();