diff --git a/.gas-snapshot b/.gas-snapshot
index 200333d..8bf28f5 100644
--- a/.gas-snapshot
+++ b/.gas-snapshot
@@ -164,19 +164,19 @@ DN420OnlyERC20Test:testTransferFromInsufficientBalanceReverts(address,uint256,ui
 DN420OnlyERC20Test:testTransferInsufficientBalanceReverts() (gas: 67140)
 DN420OnlyERC20Test:testTransferInsufficientBalanceReverts(address,uint256,uint256) (runs: 258, μ: 68173, ~: 68227)
 DN420OnlyERC20Test:test__codesize() (gas: 26885)
-DN420Test:testERC1155Methods(uint256) (runs: 258, μ: 4350728, ~: 4584934)
-DN420Test:testERC1155MethodsSelfTransfers(uint256) (runs: 258, μ: 2352430, ~: 2068336)
+DN420Test:testERC1155Methods(uint256) (runs: 258, μ: 4346596, ~: 4601179)
+DN420Test:testERC1155MethodsSelfTransfers(uint256) (runs: 258, μ: 2546320, ~: 2685708)
 DN420Test:testFindOwnedIds() (gas: 2651260)
 DN420Test:testMintNext() (gas: 2126914)
-DN420Test:testMintToNonERC155RecipientReverts(uint256) (runs: 258, μ: 914483, ~: 799285)
-DN420Test:testMintToRevertingERC155RecipientReverts(uint256) (runs: 258, μ: 1458154, ~: 981686)
-DN420Test:testMintToZeroReverts(uint256) (runs: 258, μ: 742464, ~: 665153)
-DN420Test:testMixed(uint256) (runs: 258, μ: 10537405, ~: 6419873)
-DN420Test:testSafeBatchTransferFromToERC1155Recipient(uint256) (runs: 258, μ: 2284301, ~: 2182469)
-DN420Test:testSafeTransferFromToERC1155Recipient(uint256) (runs: 258, μ: 1752377, ~: 1475201)
-DN420Test:testTransferFromToERC1155Recipient(uint256) (runs: 258, μ: 2882201, ~: 2868451)
-DN420Test:testTransferMixedReverts(uint256) (runs: 258, μ: 4563582, ~: 3427133)
-DN420Test:test__codesize() (gas: 65521)
+DN420Test:testMintToNonERC155RecipientReverts(uint256) (runs: 258, μ: 899013, ~: 798557)
+DN420Test:testMintToRevertingERC155RecipientReverts(uint256) (runs: 258, μ: 1453715, ~: 982568)
+DN420Test:testMintToZeroReverts(uint256) (runs: 258, μ: 742100, ~: 665294)
+DN420Test:testMixed(uint256) (runs: 258, μ: 10547010, ~: 6465435)
+DN420Test:testSafeBatchTransferFromToERC1155Recipient(uint256) (runs: 258, μ: 2238368, ~: 2182182)
+DN420Test:testSafeTransferFromToERC1155Recipient(uint256) (runs: 258, μ: 1784409, ~: 1475200)
+DN420Test:testTransferFromToERC1155Recipient(uint256) (runs: 258, μ: 2881452, ~: 2868451)
+DN420Test:testTransferMixedReverts(uint256) (runs: 258, μ: 4214140, ~: 3287831)
+DN420Test:test__codesize() (gas: 66295)
 MappingsTest:testAddressPairMapSetAndGet(address[2],address[2],uint256,uint256) (runs: 258, μ: 45763, ~: 47075)
 MappingsTest:testBitmapSetAndGet(uint256) (runs: 258, μ: 453208, ~: 413769)
 MappingsTest:testBitmapSetAndGet(uint256,uint256,bool,bool) (runs: 258, μ: 25592, ~: 26270)
diff --git a/test/DN420.t.sol b/test/DN420.t.sol
index 8f40e16..78390e4 100644
--- a/test/DN420.t.sol
+++ b/test/DN420.t.sol
@@ -237,9 +237,13 @@ contract DN420Test is SoladyTest {
         }
         vm.prank(_ALICE);
         dn.setApprovalForAll(address(this), true);
+
+        uint88 aliceAux = uint88(_random());
+        dn.setAux(_ALICE, aliceAux);
         _testERC1155Methods();
         _testERC1155Methods2();
         _testERC1155Methods3();
+        assertEq(dn.getAux(_ALICE), aliceAux);
     }
 
     function _testERC1155Methods() internal {
@@ -383,8 +387,11 @@ contract DN420Test is SoladyTest {
         vm.prank(_ALICE);
         dn.setApprovalForAll(address(this), true);
 
+        uint88 aliceAux = uint88(_random());
+        dn.setAux(_ALICE, aliceAux);
         _testERC1155MethodsSelfTransfers();
         _testERC1155MethodsSelfTransfers2();
+        assertEq(dn.getAux(_ALICE), aliceAux);
     }
 
     function _testERC1155MethodsSelfTransfers() internal {
@@ -896,6 +903,17 @@ contract DN420Test is SoladyTest {
         uint256 amount = _bound(_random(), 1, 10) * _WAD;
         dn.mint(from, amount, "");
 
+        uint88 fromAux = uint88(_random());
+        dn.setAux(from, fromAux);
+        _testTransferMixedReverts(from);
+        _testTransferMixedReverts2(from);
+        _testTransferMixedReverts3(from);
+        assertEq(dn.getAux(from), fromAux);
+    }
+
+    function _testTransferMixedReverts(address from) internal {
+        uint256 amount = dn.balanceOf(from);
+
         if (_random() % 4 == 0) {
             vm.expectRevert(DN420.TransferToZeroAddress.selector);
             dn.mint(address(0), _random(), "");
@@ -934,7 +952,9 @@ contract DN420Test is SoladyTest {
                 _safeTransferFromNFT(to, to, from, 1);
             }
         }
+    }
 
+    function _testTransferMixedReverts2(address from) internal {
         if (_random() % 4 == 0) {
             uint256 id = _bound(_random(), 0, 256);
             while (dn.owns(from, id)) id = _bound(_random(), 0, 256);
@@ -951,7 +971,9 @@ contract DN420Test is SoladyTest {
             vm.expectRevert(DN420.TransferFromIncorrectOwner.selector);
             dn.safeBatchTransferFromNFTs(from, from, to, ids);
         }
+    }
 
+    function _testTransferMixedReverts3(address from) internal {
         if (_random() % 2 == 0) {
             address to = _random() % 2 == 0 ? from : _randomNonZeroAddress();
             uint256[] memory ids = dn.findOwnedIds(from);