Hm, so for repeated tests with `chaos_mode_flags` set, looks like the longest execution time (8190 ms) is considered "slow" (0.8 * timeout = 8000 ms) and that causes a [test failure](https://searchfox.org/mozilla-central/source/testing/web-platform/tests/tools/wptrunner/wptrunner/stability.py#399). This change comes from [upstream](https://github.com/web-platform-tests/wpt/pull/11570). The reason why it may have issues on our end could be that our codebase sets [chaos mode to 0xfb](https://searchfox.org/mozilla-central/source/testing/web-platform/tests/tools/wptrunner/wptrunner/stability.py#358) where [upstream sets it to 0x03](https://github.com/web-platform-tests/wpt/blob/850363323df2f3d94af92d631c9bce15a296685c/tools/wptrunner/wptrunner/stability.py#L306). bug 1734020 mentions how slower chaos mode of `0xfb` can be. Otherwise, the tests actually pass.
Bug 1765426 Comment 1 Edit History
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Hm, so for repeated tests with `chaos_mode_flags` set, looks like the longest execution time (8190 ms) is considered "slow" (0.8 * timeout = 8000 ms) and that causes a [test failure](https://searchfox.org/mozilla-central/source/testing/web-platform/tests/tools/wptrunner/wptrunner/stability.py#399). This behaviour comes from [upstream](https://github.com/web-platform-tests/wpt/pull/11570). The reason why it may have issues on our end could be that our codebase sets [chaos mode to 0xfb](https://searchfox.org/mozilla-central/source/testing/web-platform/tests/tools/wptrunner/wptrunner/stability.py#358) where [upstream sets it to 0x03](https://github.com/web-platform-tests/wpt/blob/850363323df2f3d94af92d631c9bce15a296685c/tools/wptrunner/wptrunner/stability.py#L306). bug 1734020 mentions how slower chaos mode of `0xfb` can be. Otherwise, the tests actually pass.