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The True Cost of Skipping Regression Testing

· Mar 9, 2026 · 7 min read
STS Insights

Most engineering teams understand regression testing is important. Yet it’s often the first thing cut when a release is under pressure. The reasoning: ‘We only changed one small thing, it should be fine.’

That reasoning costs companies millions every year.

Regression failures are rarely about the change itself — they’re about unexpected interactions with other parts of the system. A payment flow breaks because a UI change updated a shared CSS class. An API endpoint returns malformed data because a database migration wasn’t fully tested.

At STS, we build regression suites that are fast enough to run on every merge request. The upfront investment pays back within weeks.

Need a QA partner who knows what they are doing?

We build and maintain QA programmes that protect fast-moving teams.

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