Hundreds of accumulated Cypress tests were spending more time broken than running: maintenance overhead and selector flakiness slowed every release. A full UI redesign was on the roadmap, and the team knew the existing suite would fail en masse once the new design shipped. The redesign had to go live without slipping the timeline, and manually updating hundreds of tests wasn't an option.
Case Study
30% faster launch; 200 hours saved
How Engagement Agents migrated 500 tests in a week and launched their UI redesign 30% faster
500
tests migrated in 1 week
30%
faster UI redesign launch
200+
manual hours reduced to zero
About
Engagement Agents
Engagement Agents is a SaaS platform that helps retailers unlock the marketing benefits already built into their leases through shopping center digital and physical retail media networks. By automating the submission, execution, and tracking of marketing campaigns, the platform ensures retailers make full use of the marketing opportunities they are already paying for. With a rapidly growing customer base, reliable end-to-end test coverage is essential to keeping mission-critical workflows running smoothly.
the problem
A brittle test suite and a major redesign on a tight deadline
the Solution
500 tests migrated in one week
Checksum uses AI to migrate, generate, and self-heal end-to-end Playwright tests as your product evolves. Instead of manually porting test suites or patching broken selectors, Checksum's AI handles migration and adapts tests automatically when UI changes ship, keeping coverage intact without slowing your release cycle.
No lock-in
Output is standard Playwright code delivered directly to your repo. You own it, you can run it anywhere, and your AI coding agents can use it too.
Self-healing tests
When your UI evolves, Checksum automatically repairs affected tests, beyond just selectors, repairing underlying test logic when flows themselves change.
Auto-generation
Tests are generated automatically using proprietary AI, saving months of development time writing and maintaining tests.
the Results
AI-migrated, self-healing Playwright tests that kept pace with redesign
500 tests migrated In one week
When the new UI hit staging, Checksum's auto-healing layer detected changed locators, text, and component structures and updated the tests in real time. Developers saw a green dashboard within minutes of the redesign landing: no manual edits, no downtime.
200+ hours of fixes, automated away
200+ hours of fixes, automated away
Launched 30% ahead of schedule
Every pull request automatically triggered the full Playwright suite throughout the redesign process. Bugs were caught within minutes of being introduced, keeping the team focused on shipping rather than debugging broken tests.
Checksum turned what looked like a months-long test rewrite into a one-week migration. When our new UI landed, all the tests were already green and we launched 30% faster, with full confidence.
Founder and President, Engagement Agents
