Playwright Grid: How to Run Tests on Remote Browsers
Blog post from TestMu AI
Playwright does not include a Selenium-style hub-and-node grid; instead, it provides local parallelism through worker processes and multi-machine execution through sharding, while projects determine browser-engine coverage. Workers increase throughput on one machine without changing the browser or operating system, and shards divide suites across CI jobs but generally retain the same runner environment, so neither mechanism adds platform coverage. Playwright can experimentally connect to Selenium Grid 4 for Chrome and Edge, but this integration excludes Firefox and WebKit and may be subject to future compatibility risks. Its native remote-browser APIs allow teams to build self-hosted browser servers, though scheduling, security, scaling, version compatibility, and cleanup must be managed independently. Hosted cloud grids are presented as an option for teams needing greater concurrency or access to browser versions and operating systems unavailable in CI environments, with the source highlighting TestMu AI’s support for a broad browser and OS matrix. For migration from Selenium, the recommended approach is to begin with Playwright projects, workers, and CI sharding, use remote infrastructure only for remaining coverage gaps, and retain Selenium Grid until legacy Selenium tests are retired; real-device testing remains necessary for issues specific to physical mobile hardware.
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