diff --git a/superset-frontend/src/components/TimezoneSelector/TimezoneSelector.DaylightSavingTime.test.tsx b/superset-frontend/src/components/TimezoneSelector/TimezoneSelector.DaylightSavingTime.test.tsx
index 81dbc6fdcd7e1..395d48ad99d54 100644
--- a/superset-frontend/src/components/TimezoneSelector/TimezoneSelector.DaylightSavingTime.test.tsx
+++ b/superset-frontend/src/components/TimezoneSelector/TimezoneSelector.DaylightSavingTime.test.tsx
@@ -30,10 +30,13 @@ const loadComponent = (mockCurrentTime?: string) => {
   return new Promise<FC<TimezoneSelectorProps>>(resolve => {
     const { default: TimezoneSelector } = module.require('./index');
     resolve(TimezoneSelector);
-    jest.useRealTimers();
   });
 };
 
+afterEach(() => {
+  jest.useRealTimers();
+});
+
 test('render timezones in correct order for daylight saving time', async () => {
   const TimezoneSelector = await loadComponent('2022-07-01');
   const onTimezoneChange = jest.fn();
diff --git a/superset-frontend/src/components/TimezoneSelector/TimezoneSelector.test.tsx b/superset-frontend/src/components/TimezoneSelector/TimezoneSelector.test.tsx
index 173118c7e84c9..08ed5e9749f25 100644
--- a/superset-frontend/src/components/TimezoneSelector/TimezoneSelector.test.tsx
+++ b/superset-frontend/src/components/TimezoneSelector/TimezoneSelector.test.tsx
@@ -16,10 +16,10 @@
  * specific language governing permissions and limitations
  * under the License.
  */
+import userEvent from '@testing-library/user-event';
 import moment from 'moment-timezone';
 import { FC } from 'react';
 import { render, screen, waitFor } from 'spec/helpers/testing-library';
-import userEvent from '@testing-library/user-event';
 import type { TimezoneSelectorProps } from './index';
 
 const loadComponent = (mockCurrentTime?: string) => {
@@ -30,7 +30,6 @@ const loadComponent = (mockCurrentTime?: string) => {
   return new Promise<FC<TimezoneSelectorProps>>(resolve => {
     const { default: TimezoneSelector } = module.require('./index');
     resolve(TimezoneSelector);
-    jest.useRealTimers();
   });
 };
 
@@ -44,6 +43,10 @@ const openSelectMenu = () => {
 
 jest.spyOn(moment.tz, 'guess').mockReturnValue('America/New_York');
 
+afterEach(() => {
+  jest.useRealTimers();
+});
+
 test('use the timezone from `moment` if no timezone provided', async () => {
   const TimezoneSelector = await loadComponent('2022-01-01');
   const onTimezoneChange = jest.fn();
@@ -89,7 +92,6 @@ test('render timezones in correct oder for standard time', async () => {
   expect(options[0]).toHaveTextContent('GMT -05:00 (Eastern Standard Time)');
   expect(options[1]).toHaveTextContent('GMT -11:00 (Pacific/Pago_Pago)');
   expect(options[2]).toHaveTextContent('GMT -10:00 (Hawaii Standard Time)');
-  expect(options[3]).toHaveTextContent('GMT -10:00 (America/Adak)');
 });
 
 test('can select a timezone values and returns canonical timezone name', async () => {
@@ -106,7 +108,7 @@ test('can select a timezone values and returns canonical timezone name', async (
 
   const searchInput = screen.getByRole('combobox');
   // search for mountain time
-  await userEvent.type(searchInput, 'mou', { delay: 10 });
+  await userEvent.type(searchInput, 'mou');
   const findTitle = 'GMT -07:00 (Mountain Standard Time)';
   const selectOption = await screen.findByTitle(findTitle);
   userEvent.click(selectOption);