[test] Attempt to fix flaky test

[LukasTy]

Attempt to fix a very flaky test: https://app.circleci.com/pipelines/github/mui/base-ui/16361/workflows/98e40306-b150-4b3e-9377-647f1483ffe2/jobs/168137.

Running multiple times locally no longer fails on this one. 🤔

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Also addressed locally failing test: https://github.com/mui/base-ui/pull/3169/files#r2504152349

[pkg-pr-new[bot]]

vite-css-base-ui-example

pnpm add https://pkg.pr.new/mui/base-ui/@base-ui-components/react@3169

pnpm add https://pkg.pr.new/mui/base-ui/@base-ui-components/utils@3169

commit: cb36acb

[mui-bot]

Bundle size report

Bundle	Parsed size	Gzip size
@base-ui-components/react	0B(0.00%)	0B(0.00%)

Details of bundle changes

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