Denis De O

Defect leakage: the metric that tells you if your testing actually worked

A bug in production is not just a bug. It's a signal. Here's what it's telling you — and why you should listen.

Apr 10 • Denis De O

The AI era doesn't shrink QA. It makes us indispensable.

After many years of testing enterprise systems, APIs, and everything in between, I've never felt more certain that our craft is entering its defining…

Apr 4 • Denis De O

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March 2026

Reflection: What I Would Learn If I Started QA Today

A senior tester's honest letter to their younger self about skills, mindset, and what actually matters.

Mar 29 • Denis De O

Most QA Engineers Don’t Understand the Product

And that’s where real quality starts to break

Mar 28 • Denis De O

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Your LinkedIn Profile Is Not a Resume

It’s your most important career asset and most people are using it wrong

Mar 27 • Denis De O

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Azure DevOps Test Plans: The Tool That Separates Organized QA from Chaos

Why most QA teams struggle without structured test management

Mar 26 • Denis De O

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🚀 Finding the Best Playwright Locators in Seconds with Codegen

Use Playwright Codegen and the Inspector to generate stable locators automatically and speed up your automation workflow.

Mar 6 • Denis De O

Mastering Playwright Locators: The Syntax Rules Every QA Should Know

How understanding locator syntax can make your automated tests more reliable and easier to maintain.

Mar 5 • Denis De O

February 2026

Why getByRole() Is Better Than getByText() in Playwright

how this one change can make your tests more stable, readable, and professional

Feb 21 • Denis De O

AI-Assisted Testing: The Skill That Will Define Modern QA

Most people hear "AI in testing" and imagine robots running tests by themselves. That's not it.

Feb 11 • Denis De O

January 2026

Being a TestRail Admin Is Not a Configuration Job

Why ownership, not setup, determines whether TestRail actually works

Jan 25 • Denis De O

TestRail Doesn’t Fix QA — But It Reveals Whether You Have One

Why TestRail exposes broken QA systems instead of magically improving them

Jan 25 • Denis De O