Playwright test runner shuffles test order with a reproducible seed

Introduced 2026-10-07 · score 0.98

HOW TO USE IT

When investigating tests that may depend on execution order, run the suite with `--shuffle` to randomize its order. Re-run with the emitted seed to reproduce that order.

WHY THIS HELPS

Find tests that depend on execution order while debugging a test suite.

REQUIREMENTS AND LIMITATIONS

• Version: v1.64.0
• --shuffle [seed]: Randomizes test-file order and tests in parallel mode; pass a seed to reproduce a previous order.

FIRST-PARTY EVIDENCE

• https://github.com/microsoft/playwright/releases/tag/v1.64.0
• https://github.com/microsoft/playwright/blob/v1.64.0/packages/playwright/src/program.ts

Check the installed version and the source before using it. Entry JSON

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