diff --git a/bolt-contracts/src/contracts/BoltChallenger.sol b/bolt-contracts/src/contracts/BoltChallenger.sol
index 8bac9bb4f..fe77a2f89 100644
--- a/bolt-contracts/src/contracts/BoltChallenger.sol
+++ b/bolt-contracts/src/contracts/BoltChallenger.sol
@@ -1,6 +1,8 @@
 // SPDX-License-Identifier: MIT
 pragma solidity 0.8.25;
 
+import {console} from "forge-std/Test.sol";
+
 import {EnumerableSet} from "@openzeppelin/contracts/utils/structs/EnumerableSet.sol";
 import {ECDSA} from "@openzeppelin/contracts/utils/cryptography/ECDSA.sol";
 import {Time} from "@openzeppelin/contracts/utils/types/Time.sol";
@@ -126,6 +128,11 @@ contract BoltChallenger is IBoltChallenger {
         (address txSender, address commitmentSigner, TransactionData memory firstTransactionData) =
             _recoverCommitmentData(commitments[0]);
 
+        console.log("first");
+        console.log(txSender);
+        console.log(commitmentSigner);
+        console.logBytes32(firstTransactionData.txHash);
+
         transactionsData[0] = firstTransactionData;
 
         for (uint256 i = 1; i < commitments.length; i++) {
@@ -134,6 +141,11 @@ contract BoltChallenger is IBoltChallenger {
 
             transactionsData[i] = otherTransactionData;
 
+            console.log("other");
+            console.log(otherTxSender);
+            console.log(otherCommitmentSigner);
+            console.logBytes32(otherTransactionData.txHash);
+
             // check that all commitments are for the same slot
             if (commitments[i].slot != targetSlot) {
                 revert UnexpectedMixedSlots();
diff --git a/bolt-contracts/test/BoltChallenger.t.sol b/bolt-contracts/test/BoltChallenger.t.sol
index 9ea074e39..0d759a412 100644
--- a/bolt-contracts/test/BoltChallenger.t.sol
+++ b/bolt-contracts/test/BoltChallenger.t.sol
@@ -355,6 +355,10 @@ contract BoltChallengerTest is Test {
         // Prove the full defense of a challenge: the block headers, account proof, and tx proofs
         // are all valid and the proposer has included the transaction in their slot.
         // This time, the proposer has committed to multiple transactions in their slot.
+        //
+        // The test data for this test was generated by querying for an Ethereum block with a
+        // sender that has sent multiple transactions in the same block.
+        // Check out https://etherscan.io/block/20817618
 
         uint256 inclusionBlockNumber = 20_817_618;
         IBoltChallenger.SignedCommitment[] memory commitments = new IBoltChallenger.SignedCommitment[](3);
@@ -362,6 +366,18 @@ contract BoltChallengerTest is Test {
         commitments[1] = _createRecentBoltCommitment(inclusionBlockNumber, 2);
         commitments[2] = _createRecentBoltCommitment(inclusionBlockNumber, 3);
 
+        // Sanity check senders of the transactions: they should all be the same
+        for (uint256 i = 0; i < commitments.length; i++) {
+            address recovered = commitments[i].signedTx.decodeEnveloped().recoverSender();
+            assertEq(recovered, 0xc21fb45Eeb45D883B838E30ABBd2896aE5AC888c);
+        }
+
+        // Sanity check signers of the commitments: they should all be the same
+        for (uint256 i = 0; i < commitments.length; i++) {
+            address signer = ECDSA.recover(_computeCommitmentID(commitments[i].signedTx, commitments[i].slot), commitments[i].signature);
+            assertEq(signer, target);
+        }
+
         // Open a challenge
         vm.prank(challenger);
         boltChallenger.openChallenge{value: 1 ether}(commitments);
@@ -436,6 +452,9 @@ contract BoltChallengerTest is Test {
         (uint8 v, bytes32 r, bytes32 s) = vm.sign(targetPK, commitmentID);
         commitment.signature = abi.encodePacked(r, s, v);
 
+        // Sanity check
+        assertEq(ECDSA.recover(commitmentID, commitment.signature), target);
+
         return commitment;
     }