Migrating 10,000 Selenium Tests to Playwright with Auto MigrAIte™ in 48 Hours

A major retail enterprise came to us with a familiar problem: a 10,000-test Selenium suite built up over eight years, brittle, slow to execute, and increasingly expensive to maintain. Their QE team estimated a manual migration to Playwright would take 14 engineers roughly nine months. They needed the suite modernized without freezing feature delivery for a quarter of the year.

We used Auto MigrAIte™, our AI-driven test migration engine, to parse the existing Selenium suite, page objects, locators, wait strategies, and assertions, and reconstruct equivalent Playwright tests that preserve intent rather than doing a line-by-line syntax swap. That distinction mattered: a naive transliteration would have carried over Selenium's explicit-wait anti-patterns and flaky locator strategies directly into the new suite.

The migration ran in three passes. The first pass converted structure and locators, and flagged tests whose logic couldn't be automatically resolved with high confidence. The second pass rewrote wait and synchronization logic to use Playwright's auto-waiting model instead of Selenium's explicit waits, which was the single biggest source of flakiness in the original suite. The third pass ran the full converted suite against a staging environment and diffed results against the legacy suite to catch behavioral regressions before human review.

End to end, the full 10,000-test suite was converted, validated, and handed back to the client's QE team for final sign-off in 48 hours, an 80% reduction in engineering effort versus the manual estimate. Execution time for the full suite dropped from roughly 6 hours to under 2, a 3X improvement, largely from Playwright's parallelization model and the removal of hard-coded waits.

The client's QE lead still reviewed every test the engine flagged as low-confidence, about 6% of the suite, by hand. That human checkpoint is by design: Auto MigrAIte™ is built to compress the mechanical 90% of a migration so engineers can spend their time where judgment actually matters.