How to run a subset of tests sequentially using Playwright?

Say, I kick off all my 87 (random number here) tests and there are 5 (basically, "some") of them that test on the same page and all of them make changes to that same page... of course, the tests all use the same userid to authenticate. Nope, I cannot have several different userids here

The tests all run in parallel using playwright workers.

Is there a way to mark these "few tests", like to place them in a queue, such as they will run alone, not in parallel with each other ? Some keyword to add to the test ? Something like "alone" or "enqueue" ?

Or any other idea ? Thanks.

Serial Mode

You can group those "few tests" together in a separate test file and annotate those inter-dependent tests as serial.

If one of the serial tests fails, all subsequent tests are skipped. All tests in a group are retried together.

Run an subset of tests in serial mode in separate file like below:

import { test, Page } from '@playwright/test';

// Annotate entire file as serial.
test.describe.configure({ mode: 'serial' });

let page: Page;

test.beforeAll(async ({ browser }) => {
  page = await browser.newPage();
});

test.afterAll(async () => {
  await page.close();
});

test('runs first', async () => {
  await page.goto('https://playwright.dev/');
});

test('runs second', async () => {
  await page.getByText('Get Started').click();
});