diff --git a/contracts/contracts/interfaces/IMevCommitMiddleware.sol b/contracts/contracts/interfaces/IMevCommitMiddleware.sol
index 75e0e4f2f..a785c919e 100644
--- a/contracts/contracts/interfaces/IMevCommitMiddleware.sol
+++ b/contracts/contracts/interfaces/IMevCommitMiddleware.sol
@@ -116,7 +116,7 @@ interface IMevCommitMiddleware {
     event SlashRecordCreated(address vault, address operator, uint256 blockNumber, uint256 numInitSlashableRegistered);
 
     /// @notice Emmitted when a validator position is swapped as a part of slashing
-    event ValidatorPositionSwapped(address vault, address operator, uint256 oldPosition, uint256 newPosition);
+    event ValidatorPositionSwapped(address vault, address operator, uint256 newPosition);
 
     error OnlySlashOracle(address slashOracle);
 
diff --git a/contracts/contracts/validator-registry/middleware/MevCommitMiddleware.sol b/contracts/contracts/validator-registry/middleware/MevCommitMiddleware.sol
index 23c214bba..e633f92d1 100644
--- a/contracts/contracts/validator-registry/middleware/MevCommitMiddleware.sol
+++ b/contracts/contracts/validator-registry/middleware/MevCommitMiddleware.sol
@@ -250,10 +250,9 @@ contract MevCommitMiddleware is IMevCommitMiddleware, MevCommitMiddlewareStorage
                 emit SlashRecordCreated(valRecord.vault, valRecord.operator, block.number, numSlashableRegistered);
             }
             // Swap about to be slashed pubkey with last slashable pubkey in valset.
-            uint256 oldPosition = _getPositionInValset(pubkey, valRecord.vault, valRecord.operator);
             uint256 newPosition = slashRecord.numInitSlashableRegistered - slashRecord.numSlashed; // 1-indexed
             _vaultAndOperatorToValset[valRecord.vault][valRecord.operator].swapWithPosition(pubkey, newPosition);
-            emit ValidatorPositionSwapped(valRecord.vault, valRecord.operator, oldPosition, newPosition);
+            emit ValidatorPositionSwapped(valRecord.vault, valRecord.operator, newPosition);
 
             ++slashRecord.numSlashed;
             _slashValidator(blsPubkeys[i], infractionTimestamps[i], valRecord);
diff --git a/contracts/test/validator-registry/middleware/MevCommitMiddlewareTest.sol b/contracts/test/validator-registry/middleware/MevCommitMiddlewareTest.sol
index 9597db01a..be23aa86c 100644
--- a/contracts/test/validator-registry/middleware/MevCommitMiddlewareTest.sol
+++ b/contracts/test/validator-registry/middleware/MevCommitMiddlewareTest.sol
@@ -63,7 +63,7 @@ contract MevCommitMiddlewareTest is Test {
     event SlashPeriodSecondsSet(uint256 slashPeriodSeconds);
     event SlashOracleSet(address slashOracle);
     event SlashRecordCreated(address vault, address operator, uint256 blockNumber, uint256 numInitSlashableRegistered);
-    event ValidatorPositionSwapped(address vault, address operator, uint256 oldPosition, uint256 newPosition);
+    event ValidatorPositionSwapped(address vault, address operator, uint256 newPosition);
 
     function setUp() public virtual {
         networkRegistryMock = new RegistryMock();
diff --git a/contracts/test/validator-registry/middleware/MevCommitMiddlewareTestCont.sol b/contracts/test/validator-registry/middleware/MevCommitMiddlewareTestCont.sol
index 9d58bbc85..e59058ede 100644
--- a/contracts/test/validator-registry/middleware/MevCommitMiddlewareTestCont.sol
+++ b/contracts/test/validator-registry/middleware/MevCommitMiddlewareTestCont.sol
@@ -967,11 +967,11 @@ contract MevCommitMiddlewareTestCont is MevCommitMiddlewareTest {
         vm.expectEmit(true, true, true, true);
         emit SlashRecordCreated(address(vault2), operator1, block.number, 3);
         vm.expectEmit(true, true, true, true);
-        emit ValidatorPositionSwapped(address(vault2), operator1, 1, 3);
+        emit ValidatorPositionSwapped(address(vault2), operator1, 3);
         vm.expectEmit(true, true, true, true);
         emit ValidatorSlashRequested(sampleValPubkey4, operator1, address(vault2), 0);
         vm.expectEmit(true, true, true, true);
-        emit ValidatorPositionSwapped(address(vault2), operator1, 2, 2);
+        emit ValidatorPositionSwapped(address(vault2), operator1, 2);
         vm.expectEmit(true, true, true, true);
         emit ValidatorSlashRequested(sampleValPubkey5, operator1, address(vault2), 1);
         mevCommitMiddleware.slashValidators(firstTwoBlsPubkeysFromVault2, timestamps); 
@@ -1052,7 +1052,7 @@ contract MevCommitMiddlewareTestCont is MevCommitMiddlewareTest {
         vm.expectEmit(true, true, true, true);
         emit SlashRecordCreated(address(vault2), operator1, block.number, 2);
         vm.expectEmit(true, true, true, true);
-        emit ValidatorPositionSwapped(address(vault2), operator1, 1, 2);
+        emit ValidatorPositionSwapped(address(vault2), operator1, 2);
         vm.expectEmit(true, true, true, true);
         emit ValidatorSlashRequested(sampleValPubkey6, operator1, address(vault2), 2);
         mevCommitMiddleware.slashValidators(pubkeys, timestamps);
@@ -1062,6 +1062,8 @@ contract MevCommitMiddlewareTestCont is MevCommitMiddlewareTest {
         assertEq(slashRecord.numInitSlashableRegistered, 2);
         assertEq(slashRecord.numSlashed, 1);
 
+        assertFalse(mevCommitMiddleware.isValidatorOptedIn(sampleValPubkey6));
+
         assertEq(mevCommitMiddleware.getPositionInValset(sampleValPubkey5, address(vault2), operator1), 1);
         assertEq(mevCommitMiddleware.getPositionInValset(sampleValPubkey6, address(vault2), operator1), 2);
     }