diff --git a/test/acceptance/ping.controller.acceptance.ts b/test/acceptance/ping.controller.acceptance.ts
index 058bccdbb..e669620cc 100644
--- a/test/acceptance/ping.controller.acceptance.ts
+++ b/test/acceptance/ping.controller.acceptance.ts
@@ -3,26 +3,22 @@
 // This file is licensed under the MIT License.
 // License text available at https://opensource.org/licenses/MIT
 
-import {createClientForHandler, supertest, expect} from '@loopback/testlab';
-import {RestServer} from '@loopback/rest';
+import {createRestAppClient, Client, expect} from '@loopback/testlab';
 import {ShoppingApplication} from '../..';
 
 describe('PingController', () => {
   let app: ShoppingApplication;
-  let server: RestServer;
-  let client: supertest.SuperTest<supertest.Test>;
+  let client: Client;
 
   before(givenAnApplication);
 
-  before(givenARestServer);
-
   before(async () => {
     await app.boot();
     await app.start();
   });
 
   before(() => {
-    client = createClientForHandler(server.requestHandler);
+    client = createRestAppClient(app);
   });
 
   after(async () => {
@@ -41,8 +37,4 @@ describe('PingController', () => {
       },
     });
   }
-
-  async function givenARestServer() {
-    server = await app.getServer(RestServer);
-  }
 });
diff --git a/test/acceptance/shopping-cart.controller.acceptance.ts b/test/acceptance/shopping-cart.controller.acceptance.ts
index 7dcfcd374..c469329f1 100644
--- a/test/acceptance/shopping-cart.controller.acceptance.ts
+++ b/test/acceptance/shopping-cart.controller.acceptance.ts
@@ -3,8 +3,7 @@
 // This file is licensed under the MIT License.
 // License text available at https://opensource.org/licenses/MIT
 
-import {createClientForHandler, supertest, expect} from '@loopback/testlab';
-import {RestServer} from '@loopback/rest';
+import {createRestAppClient, Client, expect} from '@loopback/testlab';
 import {ShoppingApplication} from '../..';
 import {ShoppingCartRepository} from '../../src/repositories';
 import {RedisDataSource} from '../../src/datasources';
@@ -12,21 +11,18 @@ import {ShoppingCart, ShoppingCartItem} from '../../src/models';
 
 describe('ShoppingCartController', () => {
   let app: ShoppingApplication;
-  let server: RestServer;
-  let client: supertest.SuperTest<supertest.Test>;
+  let client: Client;
   const cartRepo = new ShoppingCartRepository(new RedisDataSource());
 
   before(givenAnApplication);
 
-  before(givenARestServer);
-
   before(async () => {
     await app.boot();
     await app.start();
   });
 
   before(() => {
-    client = createClientForHandler(server.requestHandler);
+    client = createRestAppClient(app);
   });
 
   beforeEach(clearDatabase);
@@ -109,10 +105,6 @@ describe('ShoppingCartController', () => {
     });
   }
 
-  async function givenARestServer() {
-    server = await app.getServer(RestServer);
-  }
-
   async function clearDatabase() {
     await cartRepo.deleteAll();
   }
diff --git a/test/acceptance/user.controller.acceptance.ts b/test/acceptance/user.controller.acceptance.ts
index 7a5025f1a..c4cbd9f80 100644
--- a/test/acceptance/user.controller.acceptance.ts
+++ b/test/acceptance/user.controller.acceptance.ts
@@ -3,16 +3,14 @@
 // This file is licensed under the MIT License.
 // License text available at https://opensource.org/licenses/MIT
 
-import {createClientForHandler, supertest, expect} from '@loopback/testlab';
-import {RestServer} from '@loopback/rest';
+import {createRestAppClient, Client, expect} from '@loopback/testlab';
 import {ShoppingApplication} from '../..';
 import {UserRepository} from '../../src/repositories';
 import {UserDataSource} from '../../src/datasources';
 
 describe('UserController', () => {
   let app: ShoppingApplication;
-  let server: RestServer;
-  let client: supertest.SuperTest<supertest.Test>;
+  let client: Client;
   const userRepo = new UserRepository(new UserDataSource());
 
   const user = {
@@ -24,15 +22,13 @@ describe('UserController', () => {
 
   before(givenAnApplication);
 
-  before(givenARestServer);
-
   before(async () => {
     await app.boot();
     await app.start();
   });
 
   before(() => {
-    client = createClientForHandler(server.requestHandler);
+    client = createRestAppClient(app);
   });
 
   beforeEach(clearDatabase);
@@ -124,10 +120,6 @@ describe('UserController', () => {
     });
   }
 
-  async function givenARestServer() {
-    server = await app.getServer(RestServer);
-  }
-
   async function clearDatabase() {
     await userRepo.deleteAll();
   }