Playwright 1.64: What's New in the Latest Playwright Release

Playwright 1.64, released on October 7, 2026, introduces WebMCP testing APIs for validating AI-agent tools, locator.within() for scoped repeated-element queries, page.getByRef() for interacting with AI-mode accessibility snapshots, shuffled test execution with reproducible seeds, project defaults, test locks, and enhanced video recording with configurable frame rates, CSS-styled action markers, and VP9 encoding. The release also changes behavior that can affect existing suites, including forwarding emulated device screen dimensions, treating content in hidden iframes as hidden, compiling JSX according to tsconfig settings, and allowing missing-snapshot update runs to pass, while deprecating the video fontSize option in favor of CSS styles. The guide recommends upgrading directly to version 1.64.1 because it fixes Chromium routing and Electron regressions, testing WebMCP locally with Chromium feature flags because cloud and browser support remains limited, and using shuffled nightly runs to expose order-dependent tests. It also describes running compatible Playwright projects on the TestMu AI cloud grid through connectOptions, while retaining feature-flag-dependent WebMCP tests in a separate local project.

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