cherry-pick(#42566): feat(test): add subtitle option to test.step

[Yury Semikhatsky (yury-s)]

No description provided.

[github-actions]

Test results for "tests 1"

7 flaky

⚠️ [chromium-library] › library/browsertype-connect.spec.ts:928 › run-server › socks proxy › should proxy ipv6 localhost requests Radoslav Kirilov (@smoke) `@chromium-ubuntu-22.04-arm-node20`
⚠️ [chromium-library] › library/browsercontext-page-event.spec.ts:173 › should work with Ctrl-clicking `@chromium-ubuntu-22.04-node24`
⚠️ [chromium-library] › library/video.spec.ts:699 › screencast › should capture full viewport on hidpi `@chromium-ubuntu-22.04-node24`
⚠️ [firefox-library] › library/browsercontext-cookies-third-party.spec.ts:257 › third party 'Partitioned;' cookies `@firefox-ubuntu-22.04-node20`
⚠️ [firefox-library] › library/browsercontext-cookies-third-party.spec.ts:470 › top level 'Partitioned;' cookie and same origin iframe `@firefox-ubuntu-22.04-node20`
⚠️ [firefox-library] › library/video.spec.ts:294 › screencast › should capture navigation `@firefox-ubuntu-22.04-node20`
⚠️ [firefox-page] › page/page-event-request.spec.ts:181 › should return response body when Cross-Origin-Opener-Policy is set `@firefox-ubuntu-22.04-node20`

51357 passed, 1247 skipped

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Merge workflow run.

[github-actions]

Test results for "MCP"

1 failed
❌ [msedge] › mcp/annotate.spec.ts:316 › should annotate via direct browser_annotate MCP call @mcp-windows-latest-msedge

8326 passed, 1371 skipped

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Merge workflow run.

[github-actions]

🟢 CI is clear — the one real failure is a known flake

Hi, I'm the Playwright bot and I took a first look at the CI failures here.

The only non-flaky failure is mcp/annotate.spec.ts:316 on msedge/Windows, and it's a
pre-existing flake unrelated to this PR. This change only adds a subtitle option to
test.step in the test runner, which the MCP annotate flow doesn't touch. Nothing here
looks caused by the PR.

Details

Overall: the tests 1 report lists only flaky/interrupted results (nothing to triage),
and the MCP report has a single real failure that the history proves is a flake. No group
points back at this PR.

Pre-existing flake / infra

• [msedge] › mcp/annotate.spec.ts:316 › should annotate via direct browser_annotate MCP call — pre-existing flake. Across the test-results DB this exact test flips verdict on mcp-windows-latest-msedge: failed 4 of 710 runs (~0.6%), passed the other 706, and the failing runs are on SHAs this PR can't be responsible for — a push run (961a5998), PR fix(test): unflake MCP cli-core 'click link' on Firefox #42306, PR fix(har): do not hang when response extra info never arrives #42450, and this PR (cherry-pick(#42566): feat(test): add subtitle option to test.step #42567). It also flakes on other bots (firefox/Windows 6 of 701, chrome/Windows 2 of 712). The PR only adds a subtitle field to test.step (packages/playwright/src/common/testType.ts + types/docs/tests), so it doesn't exercise the MCP browser_annotate path.

Flaky (no triage needed)

• The tests 1 report's 7 entries (browsertype-connect, browsercontext-page-event, video, browsercontext-cookies-third-party, page-event-request) were all rescued on retry and are library/page tests untouched by this test-runner change.

_{Triaged by the Playwright bot - agent run}