At this year’s PSConfEU, Jeffrey Snover — the creator of PowerShell — gave a session called Navigating the AI Revolution. One idea stuck with me: engineering is how we take something that isn’t perfect yet and make it useful anyway. With AI specifically, the answer isn’t to trust it blindly — it’s to build verification layers around it. Validate the output. Trust, but verify.

That hit a nerve, because if I’m honest I’m a bit of a perfectionist and a bit of a control-freak. AI velocity is real and I want it — but handing work to something that’s confidently wrong sometimes goes against every instinct I have. So I’ve been trying to let the reins go a little, and the thing that makes that bearable is the same thing that’s always made me comfortable shipping code: tests. This post is about one testing layer in particular — Playwright MCP — and how it lets me let go without flying blind.