--- a/tests/src/addCollectionAdmin.test.ts
+++ b/tests/src/addCollectionAdmin.test.ts
@@ -15,12 +15,7 @@
 // along with Unique Network. If not, see <http://www.gnu.org/licenses/>.
 
 import {IKeyringPair} from '@polkadot/types/types';
-import chai from 'chai';
-import chaiAsPromised from 'chai-as-promised';
-import {itSub, usingPlaygrounds} from './util/playgrounds';
-
-chai.use(chaiAsPromised);
-const expect = chai.expect;
+import {itSub, usingPlaygrounds, expect} from './util/playgrounds';
 
 describe('Integration Test addCollectionAdmin(collection_id, new_admin_id):', () => {
   let donor: IKeyringPair;
--- a/tests/src/fungible.test.ts
+++ b/tests/src/fungible.test.ts
@@ -16,13 +16,9 @@
 
 import {IKeyringPair} from '@polkadot/types/types';
 import {U128_MAX} from './util/helpers';
-import {itSub, usingPlaygrounds} from './util/playgrounds';
-import chai from 'chai';
-import chaiAsPromised from 'chai-as-promised';
+import {itSub, usingPlaygrounds, expect} from './util/playgrounds';
 
-chai.use(chaiAsPromised);
-const expect = chai.expect;
-
+// todo:playgrounds get rid of globals
 let alice: IKeyringPair;
 let bob: IKeyringPair;
 
--- a/tests/src/pallet-presence.test.ts
+++ b/tests/src/pallet-presence.test.ts
@@ -14,8 +14,7 @@
 // You should have received a copy of the GNU General Public License
 // along with Unique Network. If not, see <http://www.gnu.org/licenses/>.
 
-import {expect} from 'chai';
-import {itSub, usingPlaygrounds} from './util/playgrounds';
+import {itSub, usingPlaygrounds, expect} from './util/playgrounds';
 
 // Pallets that must always be present
 const requiredPallets = [
--- a/tests/src/refungible.test.ts
+++ b/tests/src/refungible.test.ts
@@ -15,12 +15,7 @@
 // along with Unique Network. If not, see <http://www.gnu.org/licenses/>.
 
 import {IKeyringPair} from '@polkadot/types/types';
-import {itSub, Pallets, requirePalletsOrSkip, usingPlaygrounds} from './util/playgrounds';
-
-import chai from 'chai';
-import chaiAsPromised from 'chai-as-promised';
-chai.use(chaiAsPromised);
-const expect = chai.expect;
+import {itSub, Pallets, requirePalletsOrSkip, usingPlaygrounds, expect} from './util/playgrounds';
 
 let alice: IKeyringPair;
 let bob: IKeyringPair;
--- a/tests/src/removeCollectionAdmin.test.ts
+++ b/tests/src/removeCollectionAdmin.test.ts
@@ -14,13 +14,8 @@
 // You should have received a copy of the GNU General Public License
 // along with Unique Network. If not, see <http://www.gnu.org/licenses/>.
 
-import chai from 'chai';
-import chaiAsPromised from 'chai-as-promised';
 import {IKeyringPair} from '@polkadot/types/types';
-import {itSub, usingPlaygrounds} from './util/playgrounds';
-
-chai.use(chaiAsPromised);
-const expect = chai.expect;
+import {itSub, usingPlaygrounds, expect} from './util/playgrounds';
 
 describe('Integration Test removeCollectionAdmin(collection_id, account_id):', () => {
   let alice: IKeyringPair;
--- a/tests/src/removeCollectionSponsor.test.ts
+++ b/tests/src/removeCollectionSponsor.test.ts
@@ -14,13 +14,8 @@
 // You should have received a copy of the GNU General Public License
 // along with Unique Network. If not, see <http://www.gnu.org/licenses/>.
 
-import chai from 'chai';
-import chaiAsPromised from 'chai-as-promised';
 import {IKeyringPair} from '@polkadot/types/types';
-import {itSub, usingPlaygrounds} from './util/playgrounds';
-
-chai.use(chaiAsPromised);
-const expect = chai.expect;
+import {itSub, usingPlaygrounds, expect} from './util/playgrounds';
 
 describe('integration test: ext. removeCollectionSponsor():', () => {
   let donor: IKeyringPair;
--- a/tests/src/removeFromAllowList.test.ts
+++ b/tests/src/removeFromAllowList.test.ts
@@ -14,13 +14,8 @@
 // You should have received a copy of the GNU General Public License
 // along with Unique Network. If not, see <http://www.gnu.org/licenses/>.
 
-import chai from 'chai';
-import chaiAsPromised from 'chai-as-promised';
 import {IKeyringPair} from '@polkadot/types/types';
-import {itSub, usingPlaygrounds} from './util/playgrounds';
-
-chai.use(chaiAsPromised);
-const expect = chai.expect;
+import {itSub, usingPlaygrounds, expect} from './util/playgrounds';
 
 describe('Integration Test removeFromAllowList', () => {
   let alice: IKeyringPair;
--- a/tests/src/rpc.test.ts
+++ b/tests/src/rpc.test.ts
@@ -1,11 +1,22 @@
+// Copyright 2019-2022 Unique Network (Gibraltar) Ltd.
+// This file is part of Unique Network.
+
+// Unique Network is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// Unique Network is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with Unique Network. If not, see <http://www.gnu.org/licenses/>.
+
 import {IKeyringPair} from '@polkadot/types/types';
-import chai from 'chai';
-import chaiAsPromised from 'chai-as-promised';
-import {usingPlaygrounds, itSub} from './util/playgrounds';
+import {usingPlaygrounds, itSub, expect} from './util/playgrounds';
 import {crossAccountIdFromLower} from './util/playgrounds/unique';
-
-chai.use(chaiAsPromised);
-const expect = chai.expect;
 
 describe('integration test: RPC methods', () => {
   let donor: IKeyringPair;
--- a/tests/src/setCollectionLimits.test.ts
+++ b/tests/src/setCollectionLimits.test.ts
@@ -16,12 +16,7 @@
 
 // https://unique-network.readthedocs.io/en/latest/jsapi.html#setchainlimits
 import {IKeyringPair} from '@polkadot/types/types';
-import chai from 'chai';
-import chaiAsPromised from 'chai-as-promised';
-import {itSub, usingPlaygrounds} from './util/playgrounds';
-
-chai.use(chaiAsPromised);
-const expect = chai.expect;
+import {itSub, usingPlaygrounds, expect} from './util/playgrounds';
 
 const accountTokenOwnershipLimit = 0;
 const sponsoredDataSize = 0;
--- a/tests/src/setCollectionSponsor.test.ts
+++ b/tests/src/setCollectionSponsor.test.ts
@@ -14,13 +14,8 @@
 // You should have received a copy of the GNU General Public License
 // along with Unique Network. If not, see <http://www.gnu.org/licenses/>.
 
-import chai from 'chai';
-import chaiAsPromised from 'chai-as-promised';
 import {IKeyringPair} from '@polkadot/types/types';
-import {itSub, usingPlaygrounds, Pallets} from './util/playgrounds';
-
-chai.use(chaiAsPromised);
-const expect = chai.expect;
+import {itSub, usingPlaygrounds, expect, Pallets} from './util/playgrounds';
 
 describe('integration test: ext. setCollectionSponsor():', () => {
   let alice: IKeyringPair;
--- a/tests/src/setMintPermission.test.ts
+++ b/tests/src/setMintPermission.test.ts
@@ -15,12 +15,7 @@
 // along with Unique Network. If not, see <http://www.gnu.org/licenses/>.
 
 import {IKeyringPair} from '@polkadot/types/types';
-import chai from 'chai';
-import chaiAsPromised from 'chai-as-promised';
-import {itSub, usingPlaygrounds} from './util/playgrounds';
-
-chai.use(chaiAsPromised);
-const expect = chai.expect;
+import {itSub, usingPlaygrounds, expect} from './util/playgrounds';
 
 describe('Integration Test setMintPermission', () => {
   let alice: IKeyringPair;
--- a/tests/src/setPublicAccessMode.test.ts
+++ b/tests/src/setPublicAccessMode.test.ts
@@ -16,12 +16,7 @@
 
 // https://unique-network.readthedocs.io/en/latest/jsapi.html#setschemaversion
 import {IKeyringPair} from '@polkadot/types/types';
-import chai from 'chai';
-import chaiAsPromised from 'chai-as-promised';
-import {itSub, usingPlaygrounds} from './util/playgrounds';
-
-chai.use(chaiAsPromised);
-const expect = chai.expect;
+import {itSub, usingPlaygrounds, expect} from './util/playgrounds';
 
 describe('Integration Test setPublicAccessMode(): ', () => {
   let alice: IKeyringPair;
--- a/tests/src/transfer.test.ts
+++ b/tests/src/transfer.test.ts
@@ -15,13 +15,8 @@
 // along with Unique Network. If not, see <http://www.gnu.org/licenses/>.
 
 import {IKeyringPair} from '@polkadot/types/types';
-import chai from 'chai';
-import chaiAsPromised from 'chai-as-promised';
 import {itEth, usingEthPlaygrounds} from './eth/util/playgrounds';
-import {itSub, Pallets, usingPlaygrounds} from './util/playgrounds';
-
-chai.use(chaiAsPromised);
-const expect = chai.expect;
+import {itSub, Pallets, usingPlaygrounds, expect} from './util/playgrounds';
 
 describe('Integration Test Transfer(recipient, collection_id, item_id, value)', () => {
   let alice: IKeyringPair;
--- a/tests/src/transferFrom.test.ts
+++ b/tests/src/transferFrom.test.ts
@@ -15,12 +15,7 @@
 // along with Unique Network. If not, see <http://www.gnu.org/licenses/>.
 
 import {IKeyringPair} from '@polkadot/types/types';
-import chai from 'chai';
-import chaiAsPromised from 'chai-as-promised';
-import {itSub, Pallets, usingPlaygrounds} from './util/playgrounds';
-
-chai.use(chaiAsPromised);
-const expect = chai.expect;
+import {itSub, Pallets, usingPlaygrounds, expect} from './util/playgrounds';
 
 describe('Integration Test transferFrom(from, recipient, collection_id, item_id, value):', () => {
   let alice: IKeyringPair;
--- a/tests/src/util/playgrounds/index.ts
+++ b/tests/src/util/playgrounds/index.ts
@@ -2,12 +2,17 @@
 // SPDX-License-Identifier: Apache-2.0
 
 import {IKeyringPair} from '@polkadot/types/types';
+import chai from 'chai';
+import chaiAsPromised from 'chai-as-promised';
 import {Context} from 'mocha';
 import config from '../../config';
 import '../../interfaces/augment-api-events';
 import {DevUniqueHelper, SilentLogger, SilentConsole} from './unique.dev';
 
 
+chai.use(chaiAsPromised);
+export const expect = chai.expect;
+
 export const usingPlaygrounds = async (code: (helper: DevUniqueHelper, privateKey: (seed: string) => IKeyringPair) => Promise<void>) => {
   const silentConsole = new SilentConsole();
   silentConsole.enable();