diff --git a/packages/beacon-node/src/chain/chain.ts b/packages/beacon-node/src/chain/chain.ts
index 08eeb17c28c9..6f0dc7307d59 100644
--- a/packages/beacon-node/src/chain/chain.ts
+++ b/packages/beacon-node/src/chain/chain.ts
@@ -963,7 +963,8 @@ export class BeaconChain implements IBeaconChain {
 
       // Set pivotValidatorIndex to 0 if `historicalValidatorLengths` does not
       // contain validator length for cpEpoch to ensure `newFinalizedValidators` to be empty
-      const pivotValidatorIndex = headState.epochCtx.historicalValidatorLengths.get((headEpoch - cpEpoch + 1) * -1) ?? 0;
+      const pivotValidatorIndex =
+        headState.epochCtx.historicalValidatorLengths.get((headEpoch - cpEpoch + 1) * -1) ?? 0;
 
       // Note EIP-6914 will break this logic
       const newFinalizedValidators = headState.epochCtx.unfinalizedPubkey2index.filter(
diff --git a/packages/beacon-node/test/sim/6110-interop.test.ts b/packages/beacon-node/test/sim/6110-interop.test.ts
index 58850ad7e1f0..52da74756d30 100644
--- a/packages/beacon-node/test/sim/6110-interop.test.ts
+++ b/packages/beacon-node/test/sim/6110-interop.test.ts
@@ -415,7 +415,7 @@ describe("executionEngine / ExecutionEngineHttp", function () {
     // Its historicalValidatorLengths should store lengths for epoch 3 and 4 hence size should be 2
     console.log(`haha ${epochCtx.historicalValidatorLengths.size}`);
     if (epochCtx.historicalValidatorLengths.size !== 2) {
-      throw Error("Historical validator lengths is not updated correctly")
+      throw Error("Historical validator lengths is not updated correctly");
     }
 
     if (headState.depositReceiptsStartIndex === UNSET_DEPOSIT_RECEIPTS_START_INDEX) {