--- a/tests/src/approve.test.ts
+++ b/tests/src/approve.test.ts
@@ -33,7 +33,7 @@
   transferFromExpectSuccess,
   transferFromExpectFail,
   requirePallets,
-  Pallets
+  Pallets,
 } from './util/helpers';
 
 chai.use(chaiAsPromised);
--- a/tests/src/burnItem.test.ts
+++ b/tests/src/burnItem.test.ts
@@ -26,7 +26,7 @@
   setCollectionLimitsExpectSuccess,
   isTokenExists,
   requirePallets,
-  Pallets
+  Pallets,
 } from './util/helpers';
 
 import chai from 'chai';
--- a/tests/src/confirmSponsorship.test.ts
+++ b/tests/src/confirmSponsorship.test.ts
@@ -34,7 +34,7 @@
   getCreatedCollectionCount,
   UNIQUE,
   requirePallets,
-  Pallets
+  Pallets,
 } from './util/helpers';
 import {IKeyringPair} from '@polkadot/types/types';
 
--- a/tests/src/createItem.test.ts
+++ b/tests/src/createItem.test.ts
@@ -30,7 +30,7 @@
   normalizeAccountId,
   getCreateItemResult,
   requirePallets,
-  Pallets
+  Pallets,
 } from './util/helpers';
 
 const expect = chai.expect;
--- a/tests/src/createMultipleItems.test.ts
+++ b/tests/src/createMultipleItems.test.ts
@@ -35,7 +35,7 @@
   getTokenProperties,
   requirePallets,
   Pallets,
-  checkPalletsPresence
+  checkPalletsPresence,
 } from './util/helpers';
 
 chai.use(chaiAsPromised);
@@ -416,7 +416,7 @@
     await usingApi(async (api: ApiPromise) => {
       const collectionId = await createCollectionExpectSuccess();
 
-      let types = ['NFT', 'Fungible'];
+      const types = ['NFT', 'Fungible'];
 
       if (await checkPalletsPresence([Pallets.ReFungible])) {
         types.push('ReFungible');
--- a/tests/src/destroyCollection.test.ts
+++ b/tests/src/destroyCollection.test.ts
@@ -26,7 +26,7 @@
   getCreatedCollectionCount,
   createItemExpectSuccess,
   requirePallets,
-  Pallets
+  Pallets,
 } from './util/helpers';
 
 chai.use(chaiAsPromised);
--- a/tests/src/limits.test.ts
+++ b/tests/src/limits.test.ts
@@ -28,7 +28,7 @@
   getFreeBalance,
   waitNewBlocks, burnItemExpectSuccess,
   requirePallets,
-  Pallets
+  Pallets,
 } from './util/helpers';
 import {expect} from 'chai';
 
--- a/tests/src/nesting/nest.test.ts
+++ b/tests/src/nesting/nest.test.ts
@@ -18,7 +18,7 @@
   transferFromExpectSuccess,
   setCollectionLimitsExpectSuccess,
   requirePallets,
-  Pallets
+  Pallets,
 } from '../util/helpers';
 import {IKeyringPair} from '@polkadot/types/types';
 
--- a/tests/src/nesting/properties.test.ts
+++ b/tests/src/nesting/properties.test.ts
@@ -9,7 +9,7 @@
   getCreateCollectionResult,
   transferExpectSuccess,
   requirePallets,
-  Pallets
+  Pallets,
 } from '../util/helpers';
 import {IKeyringPair} from '@polkadot/types/types';
 import {tokenIdToAddress} from '../eth/util/helpers';
--- a/tests/src/nesting/unnest.test.ts
+++ b/tests/src/nesting/unnest.test.ts
@@ -11,7 +11,7 @@
   transferExpectSuccess,
   transferFromExpectSuccess,
   requirePallets,
-  Pallets
+  Pallets,
 } from '../util/helpers';
 import {IKeyringPair} from '@polkadot/types/types';
 
--- a/tests/src/nextSponsoring.test.ts
+++ b/tests/src/nextSponsoring.test.ts
@@ -28,7 +28,7 @@
   normalizeAccountId,
   getNextSponsored,
   requirePallets,
-  Pallets
+  Pallets,
 } from './util/helpers';
 
 chai.use(chaiAsPromised);
--- a/tests/src/refungible.test.ts
+++ b/tests/src/refungible.test.ts
@@ -38,7 +38,7 @@
   getDestroyItemsResult,
   getModuleNames,
   Pallets,
-  requirePallets
+  requirePallets,
 } from './util/helpers';
 
 import chai from 'chai';
--- a/tests/src/rmrk/acceptNft.test.ts
+++ b/tests/src/rmrk/acceptNft.test.ts
@@ -8,7 +8,7 @@
 } from './util/tx';
 import {NftIdTuple} from './util/fetch';
 import {isNftChildOfAnother, expectTxFailure} from './util/helpers';
-import { requirePallets, Pallets } from '../util/helpers';
+import {requirePallets, Pallets} from '../util/helpers';
 
 describe('integration test: accept NFT', () => {
   let api: any;
--- a/tests/src/rmrk/addResource.test.ts
+++ b/tests/src/rmrk/addResource.test.ts
@@ -12,7 +12,7 @@
   addNftComposableResource,
 } from './util/tx';
 import {RmrkTraitsResourceResourceInfo as ResourceInfo} from '@polkadot/types/lookup';
-import { requirePallets, Pallets } from '../util/helpers';
+import {requirePallets, Pallets} from '../util/helpers';
 
 describe('integration test: add NFT resource', () => {
   const Alice = '//Alice';
--- a/tests/src/rmrk/addTheme.test.ts
+++ b/tests/src/rmrk/addTheme.test.ts
@@ -3,7 +3,7 @@
 import {createBase, addTheme} from './util/tx';
 import {expectTxFailure} from './util/helpers';
 import {getThemeNames} from './util/fetch';
-import { requirePallets, Pallets } from '../util/helpers';
+import {requirePallets, Pallets} from '../util/helpers';
 
 describe('integration test: add Theme to Base', () => {
   let api: any;
--- a/tests/src/rmrk/burnNft.test.ts
+++ b/tests/src/rmrk/burnNft.test.ts
@@ -5,7 +5,7 @@
 
 import chai from 'chai';
 import chaiAsPromised from 'chai-as-promised';
-import { requirePallets, Pallets } from '../util/helpers';
+import {requirePallets, Pallets} from '../util/helpers';
 
 chai.use(chaiAsPromised);
 const expect = chai.expect;
--- a/tests/src/rmrk/changeCollectionIssuer.test.ts
+++ b/tests/src/rmrk/changeCollectionIssuer.test.ts
@@ -1,5 +1,5 @@
 import {getApiConnection} from '../substrate/substrate-api';
-import { requirePallets, Pallets } from '../util/helpers';
+import {requirePallets, Pallets} from '../util/helpers';
 import {expectTxFailure} from './util/helpers';
 import {
   changeIssuer,
--- a/tests/src/rmrk/createBase.test.ts
+++ b/tests/src/rmrk/createBase.test.ts
@@ -1,5 +1,5 @@
 import {getApiConnection} from '../substrate/substrate-api';
-import { requirePallets, Pallets } from '../util/helpers';
+import {requirePallets, Pallets} from '../util/helpers';
 import {createCollection, createBase} from './util/tx';
 
 describe('integration test: create new Base', () => {
--- a/tests/src/rmrk/deleteCollection.test.ts
+++ b/tests/src/rmrk/deleteCollection.test.ts
@@ -1,5 +1,5 @@
 import {getApiConnection} from '../substrate/substrate-api';
-import { requirePallets, Pallets } from '../util/helpers';
+import {requirePallets, Pallets} from '../util/helpers';
 import {expectTxFailure} from './util/helpers';
 import {createCollection, deleteCollection} from './util/tx';
 
--- a/tests/src/rmrk/getOwnedNfts.test.ts
+++ b/tests/src/rmrk/getOwnedNfts.test.ts
@@ -1,6 +1,6 @@
 import {expect} from 'chai';
 import {getApiConnection} from '../substrate/substrate-api';
-import { requirePallets, Pallets } from '../util/helpers';
+import {requirePallets, Pallets} from '../util/helpers';
 import {getOwnedNfts} from './util/fetch';
 import {mintNft, createCollection} from './util/tx';
 
--- a/tests/src/rmrk/lockCollection.test.ts
+++ b/tests/src/rmrk/lockCollection.test.ts
@@ -1,5 +1,5 @@
 import {getApiConnection} from '../substrate/substrate-api';
-import { requirePallets, Pallets } from '../util/helpers';
+import {requirePallets, Pallets} from '../util/helpers';
 import {expectTxFailure} from './util/helpers';
 import {createCollection, lockCollection, mintNft} from './util/tx';
 
--- a/tests/src/rmrk/mintNft.test.ts
+++ b/tests/src/rmrk/mintNft.test.ts
@@ -1,6 +1,6 @@
 import {expect} from 'chai';
 import {getApiConnection} from '../substrate/substrate-api';
-import { requirePallets, Pallets } from '../util/helpers';
+import {requirePallets, Pallets} from '../util/helpers';
 import {getNft} from './util/fetch';
 import {expectTxFailure} from './util/helpers';
 import {createCollection, mintNft} from './util/tx';
--- a/tests/src/rmrk/rejectNft.test.ts
+++ b/tests/src/rmrk/rejectNft.test.ts
@@ -8,7 +8,7 @@
 } from './util/tx';
 import {getChildren, NftIdTuple} from './util/fetch';
 import {isNftChildOfAnother, expectTxFailure} from './util/helpers';
-import { requirePallets, Pallets } from '../util/helpers';
+import {requirePallets, Pallets} from '../util/helpers';
 
 describe('integration test: reject NFT', () => {
   let api: any;
--- a/tests/src/rmrk/removeResource.test.ts
+++ b/tests/src/rmrk/removeResource.test.ts
@@ -1,7 +1,7 @@
 import {expect} from 'chai';
 import privateKey from '../substrate/privateKey';
 import {executeTransaction, getApiConnection} from '../substrate/substrate-api';
-import { requirePallets, Pallets } from '../util/helpers';
+import {requirePallets, Pallets} from '../util/helpers';
 import {getNft, NftIdTuple} from './util/fetch';
 import {expectTxFailure} from './util/helpers';
 import {
--- a/tests/src/rmrk/sendNft.test.ts
+++ b/tests/src/rmrk/sendNft.test.ts
@@ -3,7 +3,7 @@
 import {createCollection, mintNft, sendNft} from './util/tx';
 import {NftIdTuple} from './util/fetch';
 import {isNftChildOfAnother, expectTxFailure} from './util/helpers';
-import { requirePallets, Pallets } from '../util/helpers';
+import {requirePallets, Pallets} from '../util/helpers';
 
 describe('integration test: send NFT', () => {
   let api: any;
--- a/tests/src/rmrk/setCollectionProperty.test.ts
+++ b/tests/src/rmrk/setCollectionProperty.test.ts
@@ -1,5 +1,5 @@
 import {getApiConnection} from '../substrate/substrate-api';
-import { requirePallets, Pallets } from '../util/helpers';
+import {requirePallets, Pallets} from '../util/helpers';
 import {expectTxFailure} from './util/helpers';
 import {createCollection, setPropertyCollection} from './util/tx';
 
--- a/tests/src/rmrk/setEquippableList.test.ts
+++ b/tests/src/rmrk/setEquippableList.test.ts
@@ -1,5 +1,5 @@
 import {getApiConnection} from '../substrate/substrate-api';
-import { requirePallets, Pallets } from '../util/helpers';
+import {requirePallets, Pallets} from '../util/helpers';
 import {expectTxFailure} from './util/helpers';
 import {createCollection, createBase, setEquippableList} from './util/tx';
 
--- a/tests/src/rmrk/setNftProperty.test.ts
+++ b/tests/src/rmrk/setNftProperty.test.ts
@@ -1,5 +1,5 @@
 import {getApiConnection} from '../substrate/substrate-api';
-import { requirePallets, Pallets } from '../util/helpers';
+import {requirePallets, Pallets} from '../util/helpers';
 import {NftIdTuple} from './util/fetch';
 import {expectTxFailure} from './util/helpers';
 import {createCollection, mintNft, sendNft, setNftProperty} from './util/tx';
--- a/tests/src/rmrk/setResourcePriorities.test.ts
+++ b/tests/src/rmrk/setResourcePriorities.test.ts
@@ -1,5 +1,5 @@
 import {getApiConnection} from '../substrate/substrate-api';
-import { requirePallets, Pallets } from '../util/helpers';
+import {requirePallets, Pallets} from '../util/helpers';
 import {expectTxFailure} from './util/helpers';
 import {mintNft, createCollection, setResourcePriorities} from './util/tx';
 
--- a/tests/src/setCollectionSponsor.test.ts
+++ b/tests/src/setCollectionSponsor.test.ts
@@ -24,7 +24,7 @@
   addCollectionAdminExpectSuccess,
   getCreatedCollectionCount,
   requirePallets,
-  Pallets
+  Pallets,
 } from './util/helpers';
 import {IKeyringPair} from '@polkadot/types/types';
 
--- a/tests/src/transfer.test.ts
+++ b/tests/src/transfer.test.ts
@@ -42,7 +42,7 @@
   subToEth,
   itWeb3, 
 } from './eth/util/helpers';
-import { request } from 'https';
+import {request} from 'https';
 
 let alice: IKeyringPair;
 let bob: IKeyringPair;
--- a/tests/src/transferFrom.test.ts
+++ b/tests/src/transferFrom.test.ts
@@ -32,7 +32,7 @@
   setCollectionLimitsExpectSuccess,
   getCreatedCollectionCount,
   requirePallets,
-  Pallets
+  Pallets,
 } from './util/helpers';
 
 chai.use(chaiAsPromised);
--- a/tests/src/util/helpers.ts
+++ b/tests/src/util/helpers.ts
@@ -28,7 +28,7 @@
 import {hexToStr, strToUTF16, utf16ToStr} from './util';
 import {UpDataStructsRpcCollection, UpDataStructsCreateItemData, UpDataStructsProperty} from '@polkadot/types/lookup';
 import {UpDataStructsTokenChild} from '../interfaces';
-import { Context } from 'mocha';
+import {Context} from 'mocha';
 
 chai.use(chaiAsPromised);
 const expect = chai.expect;