diff --git a/src/L2/L2VotingPower.sol b/src/L2/L2VotingPower.sol
index a8f358d4..2742bf37 100644
--- a/src/L2/L2VotingPower.sol
+++ b/src/L2/L2VotingPower.sol
@@ -79,15 +79,25 @@ contract L2VotingPower is ERC20VotesUpgradeable, OwnableUpgradeable, UUPSUpgrade
     /// @param positionAfter Locking position after the adjustment.
     function adjustVotingPower(
         address ownerAddress,
-        LockingPosition memory positionBefore,
-        LockingPosition memory positionAfter
+        LockingPosition[] memory positionBefore,
+        LockingPosition[] memory positionAfter
     )
         public
         virtual
         onlyStakingContract
     {
-        _mint(ownerAddress, votingPower(positionAfter));
-        _burn(ownerAddress, votingPower(positionBefore));
+        require(
+            positionBefore.length == 0 || positionBefore.length == 1, "L2VotingPower: invalid positionBefore length"
+        );
+        require(positionAfter.length == 0 || positionAfter.length == 1, "L2VotingPower: invalid positionAfter length");
+
+        if (positionAfter.length > 0) {
+            _mint(ownerAddress, votingPower(positionAfter[0]));
+        }
+
+        if (positionBefore.length > 0) {
+            _burn(ownerAddress, votingPower(positionBefore[0]));
+        }
     }
 
     /// @notice Overrides clock() function to make the token & governor timestamp-based
diff --git a/test/L2/L2VotingPower.t.sol b/test/L2/L2VotingPower.t.sol
index dccbd070..7c9f2963 100644
--- a/test/L2/L2VotingPower.t.sol
+++ b/test/L2/L2VotingPower.t.sol
@@ -33,6 +33,8 @@ contract L2VotingPowerTest is Test {
     L2VotingPower public l2VotingPower;
 
     address stakingContractAddress;
+    LockingPosition[] public positionBefore;
+    LockingPosition[] public positionAfter;
 
     function setUp() public {
         utils = new Utils();
@@ -80,8 +82,8 @@ contract L2VotingPowerTest is Test {
     }
 
     function test_AdjustVotingPower_EventsAreEmitted() public {
-        LockingPosition memory positionBefore = LockingPosition(50, 50, 50);
-        LockingPosition memory positionAfter = LockingPosition(100, 100, 100);
+        positionBefore.push(LockingPosition(50, 50, 50));
+        positionAfter.push(LockingPosition(100, 100, 100));
 
         // check that events for mint and burn are emitted
         vm.expectEmit(true, true, true, true);
@@ -95,14 +97,71 @@ contract L2VotingPowerTest is Test {
     }
 
     function test_AdjustVotingPower_NotStakingContract() public {
-        LockingPosition memory positionBefore = LockingPosition(50, 50, 50);
-        LockingPosition memory positionAfter = LockingPosition(100, 100, 100);
+        positionBefore.push(LockingPosition(50, 50, 50));
+        positionAfter.push(LockingPosition(100, 100, 100));
 
         // call it as non-staking contract
         vm.expectRevert("L2VotingPower: only staking contract can call this function");
         l2VotingPower.adjustVotingPower(address(this), positionBefore, positionAfter);
     }
 
+    function test_AdjustVotingPower_PositionBeforeLength() public {
+        positionBefore.push(LockingPosition(50, 50, 50));
+        positionBefore.push(LockingPosition(50, 50, 50));
+        positionAfter.push(LockingPosition(100, 100, 100));
+
+        // call it as staking contract
+        vm.prank(stakingContractAddress);
+        vm.expectRevert("L2VotingPower: invalid positionBefore length");
+        l2VotingPower.adjustVotingPower(address(this), positionBefore, positionAfter);
+    }
+
+    function test_AdjustVotingPower_PositionAfterLength() public {
+        positionBefore.push(LockingPosition(50, 50, 50));
+        positionAfter.push(LockingPosition(100, 100, 100));
+        positionAfter.push(LockingPosition(100, 100, 100));
+
+        // call it as staking contract
+        vm.prank(stakingContractAddress);
+        vm.expectRevert("L2VotingPower: invalid positionAfter length");
+        l2VotingPower.adjustVotingPower(address(this), positionBefore, positionAfter);
+    }
+
+    function test_AdjustVotingPower_PositionBeforeIsNull() public {
+        positionAfter.push(LockingPosition(100, 100, 100));
+
+        // check that event for mint is emitted
+        vm.expectEmit(true, true, true, true);
+        emit IERC20.Transfer(address(0), address(this), 6250);
+
+        // call it as staking contract
+        vm.prank(stakingContractAddress);
+        l2VotingPower.adjustVotingPower(address(this), positionBefore, positionAfter);
+    }
+
+    function test_AdjustVotingPower_PositionAfterIsNull() public {
+        // mint some tokens that then can be burned
+        positionAfter.push(LockingPosition(500, 500, 500));
+        vm.prank(stakingContractAddress);
+        l2VotingPower.adjustVotingPower(address(this), positionBefore, positionAfter);
+
+        // clear positionAfter array
+        positionAfter.pop();
+        assertEq(positionAfter.length, 0);
+        assertEq(positionBefore.length, 0);
+
+        // only positionBefore is set
+        positionBefore.push(LockingPosition(50, 50, 50));
+
+        // check that event for burn is emitted
+        vm.expectEmit(true, true, true, true);
+        emit IERC20.Transfer(address(this), address(0), 2500);
+
+        // call it as staking contract
+        vm.prank(stakingContractAddress);
+        l2VotingPower.adjustVotingPower(address(this), positionBefore, positionAfter);
+    }
+
     function test_Clock() public {
         assertEq(l2VotingPower.clock(), vm.getBlockNumber());