What could be the reasons for 'grep' returning 0 tests when used inside a GitHub action, even though it works locally?


Troubleshooting 'grep' in GitHub Actions with Playwright

If you're using 'grep' in your GitHub Actions with @playwright/test and it's returning 0 tests, even though it works locally, there could be a few reasons why.

Check Your Configuration

First, make sure your 'grep' option is correctly configured in your GitHub Actions workflow file. This file should include steps for setting up and running Playwright tests, and specifying the 'grep' option with the right regular expressions.

// Example of a GitHub Actions workflow file
name: CI
on: [push]
    runs-on: ubuntu-latest
    - uses: actions/checkout@v2
    - uses: microsoft/playwright-github-action@v1
    - name: Test
      run: npx playwright test --grep "your-regex-here"

Review Your Test Titles

Second, your Playwright tests should have suitable titles that match with the 'grep' option. If none of your test titles match the specified regular expressions, then 'grep' won't return any tests.

// Example of a Playwright test with a descriptive title
test('loads the homepage', async ({ page }) => {
  await page.goto('https://ray.run');
  // other test steps...

Consider Environment Differences

Lastly, there might be differences between running Playwright locally versus within a GitHub Action environment. Certain environment variables or configurations might affect how Playwright executes the 'grep' option within GitHub Actions.


To troubleshoot further, examine any error messages or logs generated during the execution of your GitHub Actions workflow. These logs may provide insights into why no tests are being returned when using 'grep'.

For more help, refer to the official Playwright documentation or online communities dedicated to Playwright or GitHub Actions.


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Rayrun is a community for QA engineers. I am constantly looking for new ways to add value to people learning Playwright and other browser automation frameworks. If you have feedback, email luc@ray.run.