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Describe the bug

In #2622 I discovered that there is a bug on windows while running tests

Reproduction

https://github.com/vitejs/vite/pull/2622/checks?check_run_id=2160061709#step:10:22

System Info

• vite version: 2.1.2
• Operating System: windows
• Node version: 14
• Package manager (npm/yarn/pnpm) and version: yarn 1.22.10