Revert "Remove await nextTick, which was causing flakiness."

This reverts commit 8ee1674.

x-pack/plugins/remote_clusters/__jest__/client_integration/list/remote_clusters_list.test.js

@@ -3,7 +3,6 @@
  * or more contributor license agreements. Licensed under the Elastic License;
  * you may not use this file except in compliance with the Elastic License.
  */
-
 import { act } from 'react-dom/test-utils';
 
 import { getRouter } from '../../../public/application/services';
@@ -16,7 +15,12 @@ import { setupEnvironment, nextTick, getRandomString, findTestSubject } from '..
 import { setup } from './remote_clusters_list.helpers';
 
 describe('<RemoteClusterList />', () => {
-  const { server, httpRequestsMockHelpers } = setupEnvironment();
+  let server;
+  let httpRequestsMockHelpers;
+
+  beforeAll(() => {
+    ({ server, httpRequestsMockHelpers } = setupEnvironment());
+  });
 
   afterAll(() => {
     server.restore();
@@ -39,13 +43,14 @@ describe('<RemoteClusterList />', () => {
   });
 
   describe('when there are no remote clusters', () => {
-    let waitFor;
     let exists;
+    let component;
 
     beforeEach(async () => {
-      ({ waitFor, exists } = setup());
+      ({ exists, component } = setup());
 
-      await waitFor('remoteClusterListEmptyPrompt');
+      // await nextTick(100); // We need to wait next tick for the mock server response to kick in
+      component.update();
     });
 
     test('should display an empty prompt', async () => {