--- a/tests/package.json
+++ b/tests/package.json
@@ -47,7 +47,6 @@
     "testRemoveCollectionSponsor": "mocha --timeout 9999999 -r ts-node/register ./**/removeCollectionSponsor.test.ts",
     "testRemoveFromAllowList": "mocha --timeout 9999999 -r ts-node/register ./**/removeFromAllowList.test.ts",
     "testConnection": "mocha --timeout 9999999 -r ts-node/register ./**/connection.test.ts",
-    "testCollection": "mocha --timeout 9999999 -r ts-node/register ./**/createCollection.test.ts",
     "testContracts": "mocha --timeout 9999999 -r ts-node/register ./**/contracts.test.ts",
     "testCreateItem": "mocha --timeout 9999999 -r ts-node/register ./**/createItem.test.ts",
     "testCreateMultipleItems": "mocha --timeout 9999999 -r ts-node/register ./**/createMultipleItems.test.ts",
--- a/tests/src/burnItem.test.ts
+++ b/tests/src/burnItem.test.ts
@@ -217,22 +217,6 @@
     });
   });
 
-  it('Burn a token in a destroyed collection', async () => {
-    const createMode = 'NFT';
-    const collectionId = await createCollectionExpectSuccess({mode: {type: createMode}});
-    const tokenId = await createItemExpectSuccess(alice, collectionId, createMode);
-    await destroyCollectionExpectSuccess(collectionId);
-
-    await usingApi(async (api) => {
-      const tx = api.tx.unique.burnItem(collectionId, tokenId, 0);
-      const badTransaction = async function () {
-        await submitTransactionExpectFailAsync(alice, tx);
-      };
-      await expect(badTransaction()).to.be.rejected;
-    });
-
-  });
-
   it('Burn a token that was never created', async () => {
     const createMode = 'NFT';
     const collectionId = await createCollectionExpectSuccess({mode: {type: createMode}});
--- a/tests/src/check-event/createMultipleItemsEvent.test.ts
+++ b/tests/src/check-event/createMultipleItemsEvent.test.ts
@@ -39,7 +39,7 @@
   it('Check event from createMultipleItems(): ', async () => {
     await usingApi(async (api: ApiPromise) => {
       const collectionID = await createCollectionExpectSuccess();
-      const args = [{NFT: ['0x31', '0x31']}, {NFT: ['0x32', '0x32']}, {NFT: ['0x33', '0x33']}];
+      const args = [{NFT: {}}, {NFT: {}}, {NFT: {}}];
       const createMultipleItems = api.tx.unique.createMultipleItems(collectionID, normalizeAccountId(alice.address), args);
       const events = await submitTransactionAsync(alice, createMultipleItems);
       const msg = JSON.stringify(uniqueEventMessage(events));
--- a/tests/src/createCollection.test.ts
+++ b/tests/src/createCollection.test.ts
@@ -63,17 +63,16 @@
       const bob = privateKey('//Bob');
       const tx = api.tx.unique.createCollectionEx({
         mode: {Fungible: 8},
-        //access: 'AllowList',
+        permissions: {
+          access: 'AllowList'
+        },
         name: [1],
         description: [2],
         tokenPrefix: '0x000000',
-        //offchainSchema: '0x111111',
-        //schemaVersion: 'Unique',
         pendingSponsor: bob.address,
         limits: {
           accountTokenOwnershipLimit: 3,
         },
-        //constOnChainSchema: '0x333333',
       });
       const events = await submitTransactionAsync(alice, tx);
       const result = getCreateCollectionResult(events);
@@ -81,15 +80,12 @@
       const collection = (await getDetailedCollectionInfo(api, result.collectionId))!;
       expect(collection.owner.toString()).to.equal(alice.address);
       expect(collection.mode.asFungible.toNumber()).to.equal(8);
-      //expect(collection.access.isAllowList).to.be.true;
+      expect(collection.permissions.access.toHuman()).to.equal('AllowList');
       expect(collection.name.map(v => v.toNumber())).to.deep.equal([1]);
       expect(collection.description.map(v => v.toNumber())).to.deep.equal([2]);
       expect(collection.tokenPrefix.toString()).to.equal('0x000000');
-      //expect(collection.offchainSchema.toString()).to.equal('0x111111');
-      //expect(collection.schemaVersion.isUnique).to.be.true;
       expect(collection.sponsorship.asUnconfirmed.toString()).to.equal(bob.address);
       expect(collection.limits.accountTokenOwnershipLimit.unwrap().toNumber()).to.equal(3);
-      //expect(collection.constOnChainSchema.toString()).to.equal('0x333333');
     });
   });
 });
--- a/tests/src/limits.test.ts
+++ b/tests/src/limits.test.ts
@@ -27,7 +27,7 @@
   createItemExpectFailure,
   transferExpectSuccess,
   getFreeBalance,
-  waitNewBlocks,
+  waitNewBlocks, burnItemExpectSuccess,
 } from './util/helpers';
 import {expect} from 'chai';
 
@@ -48,6 +48,9 @@
       await createItemExpectSuccess(alice, collectionId, 'NFT');
     }
     await createItemExpectFailure(alice, collectionId, 'NFT');
+    for(let i = 1; i < 11; i++) {
+      await burnItemExpectSuccess(alice, collectionId, i);
+    }
     await destroyCollectionExpectSuccess(collectionId);
   });
 
@@ -57,6 +60,7 @@
     await setCollectionLimitsExpectSuccess(alice, collectionId, {accountTokenOwnershipLimit: 1});
     await createItemExpectSuccess(alice, collectionId, 'NFT');
     await createItemExpectFailure(alice, collectionId, 'NFT');
+    await burnItemExpectSuccess(alice, collectionId, 1);
     await destroyCollectionExpectSuccess(collectionId);
   });
 });
@@ -77,6 +81,9 @@
       await createItemExpectSuccess(alice, collectionId, 'ReFungible');
     }
     await createItemExpectFailure(alice, collectionId, 'ReFungible');
+    for(let i = 1; i < 11; i++) {
+      await burnItemExpectSuccess(alice, collectionId, i, 100);
+    }
     await destroyCollectionExpectSuccess(collectionId);
   });
 
@@ -85,6 +92,7 @@
     await setCollectionLimitsExpectSuccess(alice, collectionId, {accountTokenOwnershipLimit: 1});
     await createItemExpectSuccess(alice, collectionId, 'ReFungible');
     await createItemExpectFailure(alice, collectionId, 'ReFungible');
+    await burnItemExpectSuccess(alice, collectionId, 1, 100);
     await destroyCollectionExpectSuccess(collectionId);
   });
 });
--- a/tests/src/nextSponsoring.test.ts
+++ b/tests/src/nextSponsoring.test.ts
@@ -68,7 +68,7 @@
 
       // After transfer
       await transferExpectSuccess(collectionId, itemId, alice, bob, 1);
-      expect(await getNextSponsored(api, collectionId, normalizeAccountId(alice), itemId)).to.be.equal(5);
+      expect(await getNextSponsored(api, collectionId, normalizeAccountId(alice), itemId)).to.be.lessThanOrEqual(5);
 
       // Not existing token 
       expect(await getNextSponsored(api, collectionId, normalizeAccountId(alice), itemId+1)).to.be.equal(-1);
@@ -86,7 +86,7 @@
       expect(await getNextSponsored(api, funCollectionId, normalizeAccountId(alice), 0)).to.be.equal(0);
 
       await transferExpectSuccess(funCollectionId, 0, alice, bob, 10, 'Fungible');
-      expect(await getNextSponsored(api, funCollectionId, normalizeAccountId(alice), 0)).to.be.equal(5);
+      expect(await getNextSponsored(api, funCollectionId, normalizeAccountId(alice), 0)).to.be.lessThanOrEqual(5);
     });
   });
 
@@ -101,7 +101,7 @@
       expect(await getNextSponsored(api, refunCollectionId, normalizeAccountId(alice), refunItemId)).to.be.equal(0);
 
       await transferExpectSuccess(refunCollectionId, refunItemId, alice, bob, 10, 'ReFungible');
-      expect(await getNextSponsored(api, refunCollectionId, normalizeAccountId(alice), refunItemId)).to.be.equal(5);
+      expect(await getNextSponsored(api, refunCollectionId, normalizeAccountId(alice), refunItemId)).to.be.lessThanOrEqual(5);
 
       // Not existing token 
       expect(await getNextSponsored(api, refunCollectionId, normalizeAccountId(alice), refunItemId+1)).to.be.equal(-1);
--- a/tests/src/transfer.test.ts
+++ b/tests/src/transfer.test.ts
@@ -168,17 +168,20 @@
     // nft
     const nftCollectionId = await createCollectionExpectSuccess();
     const newNftTokenId = await createItemExpectSuccess(alice, nftCollectionId, 'NFT');
+    await burnItemExpectSuccess(alice, nftCollectionId, newNftTokenId);
     await destroyCollectionExpectSuccess(nftCollectionId);
     await transferExpectFailure(nftCollectionId, newNftTokenId, alice, bob, 1);
     // fungible
     const fungibleCollectionId = await createCollectionExpectSuccess({mode: {type: 'Fungible', decimalPoints: 0}});
     const newFungibleTokenId = await createItemExpectSuccess(alice, fungibleCollectionId, 'Fungible');
+    await burnItemExpectSuccess(alice, fungibleCollectionId, newFungibleTokenId, 10);
     await destroyCollectionExpectSuccess(fungibleCollectionId);
     await transferExpectFailure(fungibleCollectionId, newFungibleTokenId, alice, bob, 1);
     // reFungible
     const reFungibleCollectionId = await
     createCollectionExpectSuccess({mode: {type: 'ReFungible'}});
     const newReFungibleTokenId = await createItemExpectSuccess(alice, reFungibleCollectionId, 'ReFungible');
+    await burnItemExpectSuccess(alice, reFungibleCollectionId, newReFungibleTokenId, 100);
     await destroyCollectionExpectSuccess(reFungibleCollectionId);
     await transferExpectFailure(
       reFungibleCollectionId,