When checkout, signup, billing, or onboarding code changes, reviewers should know which user journey is exposed and what new coverage deserves review.
“We completely lost trust in our build, and red builds no longer meant anything. Before releases, we would spend about 3 days looking at all the failures and fixing them.”
ThoughtWorks Engineeringsource
“At Google, we found that 84% of pass-to-fail transitions are caused by flaky tests, not real bugs.”
Google Testing Blogsource
“The same pattern kept repeating itself: a harmless-looking UI change, a merge, and then a failing test in CI.”
monday.com Engineeringsource
55% of teams spend 20+ hours per week maintaining E2E tests
60-70% of testing budgets go to maintenance, not new coverage
Few tools keep test coverage fresh from PR-diff context
With Playwright and Cypress, every new feature needs hand-written tests. Every UI change needs manual selector updates. The maintenance burden grows with every sprint until teams stop writing tests entirely.
AI testing tools (Momentic, testRigor, Mabl) still require you to author tests up front. They help maintain them, but nobody generates tests from the code changes themselves.
QA Wolf eliminates maintenance by outsourcing it to their team at $96K/year. Most growth-stage companies cannot afford that.
Developer ships a checkout redesign. QA lead spends 2 days updating 15 broken E2E tests: new selectors, new assertions, new test data. Next sprint, another redesign breaks 8 more. The maintenance backlog grows. Coverage shrinks. Bugs escape to production.
Developer ships the same redesign. Zerocheck reads the PR diff, suggests tests for affected checkout and cart flows, and keeps approved tests runnable through visual interaction. Coverage grows after review instead of shrinking silently.
Show reviewers which user flows changed
Keep uncovered behavior from hiding in a green build
Turn new coverage ideas into reviewable tests
Run approved generated and human-authored coverage with PR evidence
Other tools prove their own platform is secure. Zerocheck produces JSON evidence from your executed application tests.
Get coverage on the flows customers will notice when they break, without turning testing into a quarter-long infrastructure project.
Guard the only code path where a bug is measured in lost dollars per minute.
Zerocheck reads the diff, maps changed files to affected user flows, and saves suggested tests for the impacted flows. The active approved suite still runs on the PR; new suggestions run after review and approval.
It reduces manual authoring for many critical flows, but your team stays in control. Generated tests are editable, and human-authored plain-English tests run in the same approved suite.
Generated tests are reviewable before they become active coverage. If a suggestion does not match your intent, edit it in plain English or reject it. Tests fail closed on low confidence instead of silently passing.
Every PR can create a coverage gap. Make the gap visible before the release ships.
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