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How to Move from Prompt Engineering to Harness Engineering in Testing with Matt Wynne
2026-07-14 | 39 min.Matt Wynne, co-creator of Cucumber and BDD practitioner, joins Joe for the first time in over a decade to talk about what two years inside a Silicon Valley AI startup taught him about the future of software testing.
Matt spent time at Mechanical Orchard working alongside experienced XP practitioners to modernize legacy COBOL mainframes using LLMs, and then spent a week with the team that coined the term "software factory," where the rule was simple: humans never write the code, never read the code.
In this episode, Matt breaks down what harness engineering actually means, why shared understanding is still the real bottleneck even in an agentic world, and how testers can use multiple LLMs to review AI-generated pull requests without reading every line.
He also gets honest about the grief that comes with realizing you can encode years of hard-won expertise into a Markdown file, and why that does not mean your skills are worthless.
If you are working in a brownfield codebase, wondering how to handle the flood of agentic PRs, or trying to figure out where testers fit in a world where agents write the code, this conversation is worth your time.
Find Matt at:
mattwynne.net
leansoftware.ai
Also check out his course:
Build a Software Factory: Hands-off agentic coding for experienced engineers
https://testgld.link/mattcourseAgentic Engineering for Testers: How to Automate Your Way to the Top with Amit Rawat
2026-07-07 | 43 min.Amit Rawat is an agentic engineer who spent two decades in QA before shifting fully into building AI agents. He's the creator of PromptWright, a desktop tool that turns natural language prompts into automated Playwright browser tests, complete with screen recording, Gherkin scenario generation, and self-healing locators.
In this episode, Amit and Joe get into what it actually takes to work with AI agents at a high level, starting with why the planning phase matters more than the prompt itself. Amit breaks down his own workflow, brainstorming with AI, building a detailed plan in HTML before ever executing, and why curiosity and technical depth still matter even as AI gets more capable.
They also cover why Amit believes QA professionals, more than developers or DevOps engineers, are best positioned to thrive in the agentic era, how he tracks the ROI on his $200-a-month Claude subscription, the "Chief of Staff," "Chief Health Officer," and "Chief Financial Officer" AI agents he's built to help manage different aspects of his personal life, and how he uses a memory layer so those agents understand his preferences and become more useful over time.
If you're a tester, automation engineer, or QA leader trying to figure out where AI agents fit into your workflow and your career, this conversation is a practical look at what's already working today.- Most API testing stops at the happy path. The problem is that the bugs that actually hurt you in production are sitting in everything many testers skip, like the boundary values, the oversized payloads, the missing tokens, the security headers, the inputs that make no sense at all.
In this episode, Joe sits down with Liudas Jankauskas, who has spent almost twenty years breaking software and testing APIs since 2008.
Liudas demonstrates Rentgen, his free and open-source API testing tool, live on screen. You'll watch him take a single request from a real app, map it in seconds, and generate dozens of tests covering security, boundaries, performance, and load—all from one click.
You'll learn:
How to discover APIs hiding under the hood of any application, even when there is zero documentation
Why happy path testing leaves you exposed
How to run a fast hygiene check before your real automation ever starts
Liudas also explains why Rentgen runs completely locally with no server and no data leaving your machine, making it safe for banking, healthcare, and other regulated environments.
Plus, he demonstrates the killer Copy Bug Report feature that drops a standards-based ticket straight into Jira or Trello.
In This Episode You'll Discover
How to find and test undocumented internal APIs using the browser DevTools Network tab
Why happy path-only testing misses the bugs that matter most
How Rentgen turns one request into security, boundary, performance, and load tests automatically
Where Rentgen fits in your workflow as a pre-automation hygiene layer—not a Postman replacement
How to use it for regression by comparing results across environments
The one piece of advice Liudas gives every tester to level up their API testing
Try Rentgen, free and open source, at Rentgen.io.
Connect with Liudas Jankauskas on LinkedIn:
https://www.linkedin.com/in/liudas-jankauskas/ - Your AI code review tools read the diff. They stare at your code. But they never actually run it. So the bugs that only show up at runtime, the broken user flows, the bad query plan, the duplicate submission, sail right past review and land in front of your customers.
In this episode, Joe Colantonio sits down with Evan Marshall, founder of Ito and a fifteen year engineer who spent five years in applied cryptography securing hundreds of millions of dollars for millions of people. Evan is taking that ship fast without breaking things discipline and pointing it straight at testing.
Ito is an agentic QA platform that builds and runs your actual app on every pull request, navigates it like a real user, exercises the frontend and backend as one system, and brings back real runtime evidence: video replays, logs, the exact lines responsible, and steps to reproduce, posted right in your PR.
You will learn:
Why static code review misses the bugs that cause real production incidents
How Ito spins up ephemeral environments and tests across UI, API, and database
Why QA is not disappearing, it is leveling up into a manager and quality strategist role
How to keep your test layer separate from your code generation so your signal stays honest
The skills testers and engineers need as AI writes more of the code
If you are shipping AI generated code at high velocity and your QA cannot keep up, this one is for you.
Try Ito on your own code. Your first ten pull requests are reviewed free, no credit card required. Check it out at https://testgld.link/itoai now.
And as Joe always says, seeing is believing. - What happens to QA when AI is writing ten times more code than your team can test? That is the exact problem Ivan Barajas Vargas set out to solve with Amikoo, a purpose-built AI QA agent designed to help testers, SDETs, and even developers move faster without sacrificing coverage or quality.
Ivan is no stranger to AI in testing. Before generative AI became mainstream, he co-founded MuukTest, a test automation platform built on symbolic reasoning and expert systems. After six years and thousands of customer conversations, he went back to first principles to build Amikoo from scratch, this time with a harness of 12 specialized agents and 43 tools trained specifically for testing workflows.
In this episode, Ivan and Joe dig into the real-world gap between AI code generation and AI-powered testing, why the QA role is being elevated rather than replaced, how Amikoo uses Playwright and page object model patterns under the hood, and where human judgment still has to stay in the loop. Ivan also shares practical advice on what skills QA engineers should be building right now and which test scenarios should never be fully delegated to an agent.
If you are trying to figure out where testing fits in an agentic development world, this episode gives you a clear picture of what is possible today and what is coming next.
Visit https://testgld.link/amikoo to try the freemium account, and mention you heard this on TestGuild to unlock double the free usage.
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Om TestGuild Automation Podcast
TestGuild Automation Podcast (formally Test Talks) is a weekly podcast hosted by Joe Colantonio, which geeks out on all things software test automation. TestGuild Automation covers news found in the testing space, reviews books about automation, and speaks with some of the thought leaders in the test automation field. We'll aim to interview some of today's most successful and inspiring software engineers, and test automation thought leaders.
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