📄 playwright-python/docs/api/class-reporter

File: class-reporter.md | Updated: 11/18/2025

Source: https://playwright.dev/docs/api/class-reporter

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Test runner notifies the reporter about various events during test execution. All methods of the reporter are optional.

You can create a custom reporter by implementing a class with some of the reporter methods. Make sure to export this class as default.

  • TypeScript
  • JavaScript

my-awesome-reporter.ts

import type {  Reporter, FullConfig, Suite, TestCase, TestResult, FullResult} from '@playwright/test/reporter';class MyReporter implements Reporter {  constructor(options: { customOption?: string } = {}) {    console.log(`my-awesome-reporter setup with customOption set to ${options.customOption}`);  }  onBegin(config: FullConfig, suite: Suite) {    console.log(`Starting the run with ${suite.allTests().length} tests`);  }  onTestBegin(test: TestCase) {    console.log(`Starting test ${test.title}`);  }  onTestEnd(test: TestCase, result: TestResult) {    console.log(`Finished test ${test.title}: ${result.status}`);  }  onEnd(result: FullResult) {    console.log(`Finished the run: ${result.status}`);  }}export default MyReporter;

my-awesome-reporter.js

// @ts-check/** @implements {import('@playwright/test/reporter').Reporter} */class MyReporter {  constructor(options) {    console.log(`my-awesome-reporter setup with customOption set to ${options.customOption}`);  }  onBegin(config, suite) {    console.log(`Starting the run with ${suite.allTests().length} tests`);  }  onTestBegin(test) {    console.log(`Starting test ${test.title}`);  }  onTestEnd(test, result) {    console.log(`Finished test ${test.title}: ${result.status}`);  }  onEnd(result) {    console.log(`Finished the run: ${result.status}`);  }}module.exports = MyReporter;

Now use this reporter with testConfig.reporter . Learn more about using reporters .

playwright.config.ts

import { defineConfig } from '@playwright/test';export default defineConfig({  reporter: [['./my-awesome-reporter.ts', { customOption: 'some value' }]],});

Here is a typical order of reporter calls:

Additionally, reporter.onStdOut() and reporter.onStdErr() are called when standard output is produced in the worker process, possibly during a test execution, and reporter.onError() is called when something went wrong outside of the test execution.

If your custom reporter does not print anything to the terminal, implement reporter.printsToStdio() and return false. This way, Playwright will use one of the standard terminal reporters in addition to your custom reporter to enhance user experience.

Merged report API notes

When merging multiple blob reports via merge-reports CLI command, the same Reporter API is called to produce final reports and all existing reporters should work without any changes. There some subtle differences though which might affect some custom reporters.

  • Projects from different shards are always kept as separate TestProject objects. E.g. if project 'Desktop Chrome' was sharded across 5 machines then there will be 5 instances of projects with the same name in the config passed to reporter.onBegin() .

Methods​

onBegin​

Added in: v1.10 reporter.onBegin

Called once before running tests. All tests have been already discovered and put into a hierarchy of Suite s.

Usage

reporter.onBegin(config, suite);

Arguments

  • config FullConfig #

    Resolved configuration.

  • suite Suite #

    The root suite that contains all projects, files and test cases.

onEnd​

Added in: v1.10 reporter.onEnd

Called after all tests have been run, or testing has been interrupted. Note that this method may return a Promise and Playwright Test will await it. Reporter is allowed to override the status and hence affect the exit code of the test runner.

Usage

await reporter.onEnd(result);

Arguments

  • result Object #

    • status "passed" | "failed" | "timedout" | "interrupted"

      Test run status.

    • startTime Date

      Test run start wall time.

    • duration number

      Test run duration in milliseconds.

    Result of the full test run, status can be one of:

    • 'passed' - Everything went as expected.
    • 'failed' - Any test has failed.
    • 'timedout' - The testConfig.globalTimeout has been reached.
    • 'interrupted' - Interrupted by the user.

Returns

  • Promise <Object >#
    • status "passed" | "failed" | "timedout" | "interrupted" (optional)

onError​

Added in: v1.10 reporter.onError

Called on some global error, for example unhandled exception in the worker process.

Usage

reporter.onError(error);

Arguments

onExit​

Added in: v1.33 reporter.onExit

Called immediately before test runner exists. At this point all the reporters have received the reporter.onEnd() signal, so all the reports should be build. You can run the code that uploads the reports in this hook.

Usage

await reporter.onExit();

Returns

onStdErr​

Added in: v1.10 reporter.onStdErr

Called when something has been written to the standard error in the worker process.

Usage

reporter.onStdErr(chunk, test, result);

Arguments

  • chunk string | Buffer #

    Output chunk.

  • test void | TestCase #

    Test that was running. Note that output may happen when no test is running, in which case this will be void .

  • result void | TestResult #

    Result of the test run, this object gets populated while the test runs.

onStdOut​

Added in: v1.10 reporter.onStdOut

Called when something has been written to the standard output in the worker process.

Usage

reporter.onStdOut(chunk, test, result);

Arguments

  • chunk string | Buffer #

    Output chunk.

  • test void | TestCase #

    Test that was running. Note that output may happen when no test is running, in which case this will be void .

  • result void | TestResult #

    Result of the test run, this object gets populated while the test runs.

onStepBegin​

Added in: v1.10 reporter.onStepBegin

Called when a test step started in the worker process.

Usage

reporter.onStepBegin(test, result, step);

Arguments

  • test TestCase #

    Test that the step belongs to.

  • result TestResult #

    Result of the test run, this object gets populated while the test runs.

  • step TestStep #

    Test step instance that has started.

onStepEnd​

Added in: v1.10 reporter.onStepEnd

Called when a test step finished in the worker process.

Usage

reporter.onStepEnd(test, result, step);

Arguments

  • test TestCase #

    Test that the step belongs to.

  • result TestResult #

    Result of the test run.

  • step TestStep #

    Test step instance that has finished.

onTestBegin​

Added in: v1.10 reporter.onTestBegin

Called after a test has been started in the worker process.

Usage

reporter.onTestBegin(test, result);

Arguments

  • test TestCase #

    Test that has been started.

  • result TestResult #

    Result of the test run, this object gets populated while the test runs.

onTestEnd​

Added in: v1.10 reporter.onTestEnd

Called after a test has been finished in the worker process.

Usage

reporter.onTestEnd(test, result);

Arguments

printsToStdio​

Added in: v1.10 reporter.printsToStdio

Whether this reporter uses stdio for reporting. When it does not, Playwright Test could add some output to enhance user experience. If your reporter does not print to the terminal, it is strongly recommended to return false.

Usage

reporter.printsToStdio();

Returns