---
title: "Discussion on \"I Trusted the Regression Test After We Broke the Fix\" | Hashnode"
description: "Discussion on \"I Trusted the Regression Test After We Broke the Fix\". A quick check that made our mobile regression tests more credible."
url: "https://hashnode.com/posts/i-trusted-the-regression-test-after-we-broke-the-fix/6ae75ca110f0f567ec4f69d5"
---

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Discussion

# [I Trusted the Regression Test After We Broke the Fix](https://mradib.hashnode.dev/i-trusted-the-regression-test-after-we-broke-the-fix?utm_source=hashnode&utm_medium=feed)

A quick check that made our mobile regression tests more credible.

Nov 1 · 4 min read · mradib.hashnode.dev  
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## Written by

[John Adib](https://hashnode.com/@mradib)

@mradib · London, UK

  
[View profile](https://hashnode.com/@mradib)

London engineering leader, former CTO and UK Global Talent endorsee. ADPList100 mentor.

John Adib is a London-based engineering leader and two-time founder whose work spans mobile products, cloud platforms and teams. A former CTO, he helped build an e-commerce platform serving more than 1,200 businesses and now works as an Engineering Manager. He brings AI into everyday delivery with tests, review and device evidence woven into each change. Tech Nation endorsed him under the UK Global Talent route, and ADPList named him among its World's Most Influential Mentors in 2024 and 2026. He speaks at developer events and mentors engineers worldwide.

## Responses 1

Markdown supported · ⌘↵ to post

[Ahmet Özel](https://hashnode.com/@ahmetozel)

[Nov 1](https://hashnode.com/posts/i-trusted-the-regression-test-after-we-broke-the-fix/6ae75ca110f0f567ec4f69d5/comment/6ae79012a8133a4bc712f6c3)

Reverting the fixes and checking the actual failure reason is stronger evidence than the jump from 113 to 2,257 test files. With two defects corrected together, I would take the experiment one step further and restore each defect independently as well as restoring both.

That produces a small matrix showing which specification detects which fault. It can reveal a test that only fails because the other defect prevents setup from completing, even when the combined revert looks convincing. Keeping those isolated failure outputs with the reviewed revision would make the regression claim easier to assess later.