Playwright Visual Regression Testing Without Flakes

Sun, 25 May 2025 16:34:42 -0500

Visual regression tests catch the bugs functional tests cannot: a CSS change that pushes the checkout button under the footer, a font that failed to load, a dark mode that renders black text on a black background. They also have a reputation for flaking, and most teams that give up on them do so because baselines fail for reasons nobody can see in the diff. Nearly all of that flakiness comes from four sources: time, randomness, fonts and rendering environment. This guide shows how to remove each one with Playwright’s built-in toHaveScreenshot, then takes an honest look at where AI-assisted visual diffing tools help.

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Playwright Visual Regression Testing Without Flakes