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Summary: This test started failing recently in older versions of React because the Scheduler priority inside a microtask is Normal instead of Immediate. This is expected because microtasks are not Scheduler tasks; it's an implementation detail. I gated the test to only run in v17 because it's a regression test for legacy Suspense behavior, and the implementation details of the snapshot changed in v18. Test plan x--------- Using latest: ``` yarn test --build --project devtools --release-channel=experimental profilingcache ``` Using v17 (typically runs in a timed CI workflow): ``` /scripts/circleci/download_devtools_regression_build.js 17.0 --replaceBuild yarn test --build --project devtools --release-channel=experimental --reactVersion 17.0 profilingcache ``` DiffTrain build for commit https://github.com/facebook/react/commit/86b0e91998a04b22bb54a95d54f4a7632efa902f. Changelog: [Internal] << DO NOT EDIT BELOW THIS LINE >> Reviewed By: sammy-SC Differential Revision: D45424707 fbshipit-source-id: f3a761984c0ac53b5514f8ff51635bf6c4bab8f6