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docs(testing): add a note on flaky tests to usage instructions (#30843)

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Co-authored-by: Brandy Smith <6577830+brandyscarney@users.noreply.github.com>
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Brandy Smith
2025-12-08 13:56:29 -05:00
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docs/core/testing/usage-instructions.md
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@@ -186,7 +186,21 @@ test.describe.only('group of tests', () => {
> [!IMPORTANT]
> After debugging, make sure to remove the `.only` suffix to ensure all tests run again during normal execution.
#### 3. Pausing Test Execution
#### 3. Repeating Tests to Reproduce Flaky Failures
Flaky tests may not fail consistently. To help reproduce intermittent failures locally, you can use Playwright's `--repeat-each` flag to run the same test multiple times in a row.
This is especially useful when CI reports a failure you cannot reproduce on your first local run.
**Example:**
```shell
npm run test.e2e.docker.update-snapshots src/components/radio/test/a11y/radio.e2e.ts -- --repeat-each=10
```
This runs the test 10 times, increasing the chance of catching the flaky behavior.
#### 4. Pausing Test Execution
Additionally, you can pause execution of a test by using the `page.pause()` method. This pauses the script execution and allows you to manually inspect the page in the browser.