playwright/docs/src/ci.md

---
id: ci
title: "Continuous Integration"
---

Playwright tests can be executed in CI environments. We have created sample
configurations for common CI providers.

<!-- TOC -->

## Introduction

3 steps to get your tests running on CI:

1. **Ensure CI agent can run browsers**: Use [our Docker image](./docker.md)
   in Linux agents. Windows and macOS agents do not require any additional dependencies.
1. **Install Playwright**:
   ```bash js
   npm ci
   # or
   npm install
   ```
   ```bash python
   pip install playwright
   playwright install
   ```

1. **Run your tests**:
   ```bash js
   npm test
   ```
   ```bash python
   pytest
   ```

## CI configurations

### GitHub Actions

The [Playwright GitHub Action](https://github.com/microsoft/playwright-github-action) can be used to run Playwright tests on GitHub Actions.

```yml js
steps:
  - uses: microsoft/playwright-github-action@v1
  - name: Run your tests
    run: npm test
```

```yml python
steps:
  - uses: microsoft/playwright-github-action@v1
  - name: Set up Python
    uses: actions/setup-python@v2
    with:
      python-version: 3.8
  - name: Install dependencies
    run: |
      python -m pip install --upgrade pip
      pip install playwright
      pip install -e .
  - name: Ensure browsers are installed
    run: python -m playwright install
  - name: Run your tests
    run: pytest
```

We run [our tests](https://github.com/microsoft/playwright/blob/master/.github/workflows/tests.yml) on GitHub Actions, across a matrix of 3 platforms (Windows, Linux, macOS) and 3 browsers (Chromium, Firefox, WebKit).

### Docker

We have a [pre-built Docker image](./docker.md) which can either be used directly, or as a reference to update your existing Docker definitions.

Suggested configuration
1. By default, Docker runs a container with a `/dev/shm` shared memory space 64MB.
   This is [typically too small](https://github.com/c0b/chrome-in-docker/issues/1) for Chromium
   and will cause Chromium to crash when rendering large pages. To fix, run the container with
   `docker run --shm-size=1gb` to increase the size of `/dev/shm`. Since Chromium 65, this is no
   longer necessary. Instead, launch the browser with the `--disable-dev-shm-usage` flag:

   ```js
   const browser = await playwright.chromium.launch({
     args: ['--disable-dev-shm-usage']
   });
   ```

   ```java
   Browser browser = playwright.chromium().launch(new BrowserType.LaunchOptions()
     .setArgs(Arrays.asList("--disable-dev-shm-usage")));
   ```

   ```python async
   browser = await playwright.chromium.launch(
      args=['--disable-dev-shm-usage']
   )
   ```

   ```python sync
   browser = playwright.chromium.launch({
      args=['--disable-dev-shm-usage']
   })
   ```

   ```csharp
   await playwright.Chromium.LaunchAsync(new BrowserTypeLaunchOptions
   {
        Args = new[] { "--disable-dev-shm-usage" }
   });
   ```

   This will write shared memory files into `/tmp` instead of `/dev/shm`. See
   [crbug.com/736452](https://bugs.chromium.org/p/chromium/issues/detail?id=736452) for more details.
1. Using `--ipc=host` is also recommended when using Chromium—without it Chromium can run out of memory
   and crash. Learn more about this option in [Docker docs](https://docs.docker.com/engine/reference/run/#ipc-settings---ipc).
1. Seeing other weird errors when launching Chromium? Try running your container
   with `docker run --cap-add=SYS_ADMIN` when developing locally.
1. [dumb-init](https://github.com/Yelp/dumb-init) is worth checking out if you're
   experiencing a lot of zombies Chromium processes sticking around. There's special
   treatment for processes with PID=1, which makes it hard to terminate Chromium
   properly in some cases (e.g. in Docker).

### Azure Pipelines

For Windows or macOS agents, no additional configuration required, just install Playwright and run your tests.

For Linux agents, you can use [our Docker container](./docker.md) with Azure Pipelines support for [running containerized jobs](https://docs.microsoft.com/en-us/azure/devops/pipelines/process/container-phases?view=azure-devops). Alternatively, you can refer to the [Dockerfile](./docker.md) to see additional dependencies that need to be installed on a Ubuntu agent.

```yml
pool:
  vmImage: 'ubuntu-20.04'

container: mcr.microsoft.com/playwright:focal

steps:
...
```

### Travis CI

Suggested configuration
1. [User namespace cloning](http://man7.org/linux/man-pages/man7/user_namespaces.7.html)
   should be enabled to support proper sandboxing
1. [xvfb](https://en.wikipedia.org/wiki/Xvfb) should be launched in order to run
   Chromium in non-headless mode (e.g. to test Chrome Extensions)
1. If your project does not have `package-lock.json`, Travis would be auto-caching
   `node_modules` directory. If you run `npm install` (instead of `npm ci`), it is
   possible that the browser binaries are not downloaded. Fix this with [these steps](#exception-node_modules-are-cached) outlined below.

To sum up, your `.travis.yml` might look like this:

```yml
language: node_js
dist: bionic
addons:
  apt:
    packages:
    # These are required to run webkit
    - libwoff1
    - libopus0
    - libwebp6
    - libwebpdemux2
    - libenchant1c2a
    - libgudev-1.0-0
    - libsecret-1-0
    - libhyphen0
    - libgdk-pixbuf2.0-0
    - libegl1
    - libgles2
    - libevent-2.1-6
    - libnotify4
    - libxslt1.1
    - libvpx5
    # gstreamer and plugins to support video playback in WebKit.
    - gstreamer1.0-gl
    - gstreamer1.0-plugins-base
    - gstreamer1.0-plugins-good
    - gstreamer1.0-plugins-bad
    # This is required to run chromium
    - libgbm1
    # this is needed for running headed tests
    - xvfb

# allow headed tests
before_install:
  # Enable user namespace cloning
  - "sysctl kernel.unprivileged_userns_clone=1"
  # Launch XVFB
  - "export DISPLAY=:99.0"
  - "sh -e /etc/init.d/xvfb start"
```

### CircleCI

Running Playwright on CircleCI requires the following steps:

1. Use the pre-built [Docker image](./docker.md) in your config like so:

   ```yml
   docker:
     - image: mcr.microsoft.com/playwright:focal
   environment:
     NODE_ENV: development # Needed if playwright is in `devDependencies`
   ```

1. If you’re using Playwright through Jest, then you may encounter an error spawning child processes:

   ```
   [00:00.0]  jest args: --e2e --spec --max-workers=36
   Error: spawn ENOMEM
      at ChildProcess.spawn (internal/child_process.js:394:11)
   ```

   This is likely caused by Jest autodetecting the number of processes on the entire machine (`36`) rather than the number allowed to your container (`2`). To fix this, set `jest --maxWorkers=2` in your test command.

### Jenkins

Jenkins supports Docker agents for pipelines. Use the [Playwright Docker image](./docker.md)
to run tests on Jenkins.

```groovy
pipeline {
   agent { docker { image 'mcr.microsoft.com/playwright:focal' } }
   stages {
      stage('e2e-tests') {
         steps {
            sh 'npm install'
            sh 'npm run test'
         }
      }
   }
}
```

### Bitbucket Pipelines

Bitbucket Pipelines can use public [Docker images as build environments](https://confluence.atlassian.com/bitbucket/use-docker-images-as-build-environments-792298897.html). To run Playwright tests on Bitbucket, use our public Docker image ([see Dockerfile](./docker.md)).

```yml
image: mcr.microsoft.com/playwright:focal
```

While the Docker image supports sandboxing for Chromium, it does not work in the Bitbucket Pipelines environment. To launch Chromium on Bitbucket Pipelines, use the `chromiumSandbox: false` launch argument.

```js
const { chromium } = require('playwright');
const browser = await chromium.launch({ chromiumSandbox: false });
```

```java
import com.microsoft.playwright.*;

public class Example {
  public static void main(String[] args) {
    try (Playwright playwright = Playwright.create()) {
      BrowserType chromium = playwright.chromium();
      Browser browser = chromium.launch(new BrowserType.LaunchOptions().setChromiumSandbox(false));
    }
  }
}
```

```python async
browser = await playwright.chromium.launch(chromium_sandbox=False)
```

```python sync
browser = playwright.chromium.launch(chromium_sandbox=False)
```

```csharp
using Microsoft.Playwright;
using System.Threading.Tasks;

class Program
{
    public static async Task Main()
    {
        using var playwright = await Playwright.CreateAsync();
        await playwright.Chromium.LaunchAsync(new BrowserTypeLaunchOptions
        {
            ChromiumSandbox = false
        });
    }
}
```

### GitLab CI

To run Playwright tests on GitLab, use our public Docker image ([see Dockerfile](./docker.md)).

```yml
stages:
  - test

tests:
  stage: test
  image: mcr.microsoft.com/playwright:focal
  script:
  ...
```

## Caching browsers

By default, Playwright downloads browser binaries when the Playwright NPM package
is installed. The NPM packages have a `postinstall` hook that downloads the browser
binaries. This behavior can be [customized with environment variables](./installation.md).

Caching browsers on CI is **strictly optional**: The `postinstall` hooks should
execute and download the browser binaries on every run.

#### Exception: `node_modules` are cached (Node-specific)

Most CI providers cache the [npm-cache](https://docs.npmjs.com/cli-commands/cache.html)
directory (located at `$HOME/.npm`). If your CI pipelines caches the `node_modules`
directory and you run `npm install` (instead of `npm ci`), the default configuration
**will not work**. This is because the `npm install` step will find the Playwright NPM
package on disk and not execute the `postinstall` step.

> Travis CI automatically caches `node_modules` if your repo does not have a
  `package-lock.json` file.

This behavior can be fixed with one of the following approaches:
1. Move to caching `$HOME/.npm` or the npm-cache directory. (This is the default
   behavior in most CI providers.)
1. Set `PLAYWRIGHT_BROWSERS_PATH=0` as the environment variable before running
   `npm install`. This will download the browser binaries in the `node_modules`
   directory and cache them with the package code. See [installation docs](./installation.md).
1. Use `npm ci` (instead of `npm install`) which forces a clean install: by
   removing the existing `node_modules` directory. See [npm docs](https://docs.npmjs.com/cli/ci.html).
1. Cache the browser binaries, with the steps below.

#### Directories to cache

With the default behavior, Playwright downloads the browser binaries in the following
directories:

- `%USERPROFILE%\AppData\Local\ms-playwright` on Windows
- `~/Library/Caches/ms-playwright` on MacOS
- `~/.cache/ms-playwright` on Linux

To cache the browser downloads between CI runs, cache this location in your CI
configuration, against a hash of the Playwright version.

## Debugging browser launches

Playwright supports the `DEBUG` environment variable to output debug logs during execution. Setting it to `pw:browser*` is helpful while debugging `Error: Failed to launch browser` errors.

```bash js
DEBUG=pw:browser* npm run test
```
```bash python
DEBUG=pw:browser* pytest
```

## Running headed

By default, Playwright launches browsers in headless mode. This can be changed by passing a flag when the browser is launched.

```js
// Works across chromium, firefox and webkit
const { chromium } = require('playwright');
const browser = await chromium.launch({ headless: false });
```

```java
// Works across chromium, firefox and webkit
import com.microsoft.playwright.*;

public class Example {
  public static void main(String[] args) {
    try (Playwright playwright = Playwright.create()) {
      BrowserType chromium = playwright.chromium();
      Browser browser = chromium.launch(new BrowserType.LaunchOptions().setHeadless(false));
    }
  }
}
```

```python async
import asyncio
from playwright.async_api import async_playwright

async def main():
    async with async_playwright() as p:
         # Works across chromium, firefox and webkit
         browser = await p.chromium.launch(headless=False)

asyncio.run(main())
```

```python sync
from playwright.sync_api import sync_playwright

with sync_playwright() as p:
   # Works across chromium, firefox and webkit
   browser = p.chromium.launch(headless=False)
```

```csharp
using Microsoft.Playwright;
using System.Threading.Tasks;

class Program
{
    public static async Task Main()
    {
        using var playwright = await Playwright.CreateAsync();
        await playwright.Chromium.LaunchAsync(new BrowserTypeLaunchOptions
        {
            Headless = false
        });
    }
}
```

On Linux agents, headed execution requires [Xvfb](https://en.wikipedia.org/wiki/Xvfb) to be installed. Our [Docker image](./docker.md) and GitHub Action have Xvfb pre-installed. To run browsers in headed mode with Xvfb, add `xvfb-run` before the Node.js command.

```bash js
xvfb-run node index.js
```
```bash python
xvfb-run python test.py
```