diff --git a/ethereum/referencetests/src/main/java/org/hyperledger/besu/ethereum/referencetests/ReferenceTestEnv.java b/ethereum/referencetests/src/main/java/org/hyperledger/besu/ethereum/referencetests/ReferenceTestEnv.java
index bac137b2a58..230efc4f92c 100644
--- a/ethereum/referencetests/src/main/java/org/hyperledger/besu/ethereum/referencetests/ReferenceTestEnv.java
+++ b/ethereum/referencetests/src/main/java/org/hyperledger/besu/ethereum/referencetests/ReferenceTestEnv.java
@@ -97,7 +97,7 @@ Withdrawal asWithdrawal() {
    */
   @JsonCreator
   public ReferenceTestEnv(
-      @JsonProperty("beaconRoot") final String beaconRoot,
+      @JsonProperty("parentBeaconBlockRoot") final String beaconRoot,
       @JsonProperty("blockHashes") final Map<String, String> blockHashes,
       @JsonProperty("ommers") final List<String> _ommers,
       @JsonProperty("previousHash") final String previousHash,