How do I run the same test with different data in Playwright?

Put the cases in an array and loop over it, calling test() once per item with the data in the title. Each item becomes its own test in the report, so one failing case does not hide the others.

This answer is one piece of Chapter 21: Test Data.

Data-Driven Testing Patterns
Reading and Writing Excel Test Data
Many Users and Roles in One Spec
Building the Test Layer

Playwright calls this parameterising tests, and its docs show the loop pattern directly. You write the test once, and the loop registers it once per row of data. A comment in the docs' example points out the condition that makes it work: it is fine "as long the test name is unique". Putting the data in the title, here with a template literal, does that for you.

This is better than one test that checks every product in turn. In a single test, the first wrong price stops the run, so you learn about one defect at a time. As separate tests, each case passes or fails on its own, and the report names exactly which product broke.

In the example, three products from the practice app's catalogue each get a test that opens the catalogue and checks that card's price. The run shows three tests with three different titles. The data could just as well come from a JSON file, as long as each row produces a unique title.

param.spec.js(https://practice.learnplayforge.com)

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

const products = [
  { sku: 'MRD-1001', name: 'Aurora Pour-Over Kettle', price: '₹4,290' },
  { sku: 'MRD-1003', name: 'Halcyon Burr Grinder', price: '₹11,900' },
  { sku: 'MRD-1005', name: 'Bellwether Espresso Tamper', price: '₹1,890' },
];

for (const { sku, name, price } of products) {
  test(`${name} is priced ${price}`, async ({ page }) => {
    await page.goto('/catalog.html?mock=static&seed=42&autologin=1');
    const card = page.locator(`article[data-sku="${sku}"]`);
    await expect(card.getByTestId('product-price')).toHaveText(price);
  });
}

Output

  ok 1 › Aurora Pour-Over Kettle is priced ₹4,290 (1.2s)
  ok 2 › Halcyon Burr Grinder is priced ₹11,900 (1.1s)
  ok 3 › Bellwether Espresso Tamper is priced ₹1,890 (1.2s)

  3 passed (4.6s)

Test yourself

You loop over three products and call test('price check', ...) with the same title each time. What is the problem?

AI can write the test now. The job is knowing whether it checks anything. That's what the course teaches, one chapter at a time.

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How do I run the same test with different data in Playwright?

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