June 9, 2026

• Shard Balancing. Test runners can now fetch each test’s predicted duration from a new Durations API and split the suite into shards of roughly equal running time, so a run finishes sooner instead of waiting on its slowest shard. See Shard Balancing for how it works and its tradeoffs.

  Playwright Test is the first test runner to support it; see its documentation for setup. More runners are coming.