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#8718 vitest-pool-workers process.env is not populated

Recommendation:KEEP OPEN
Difficulty:easy
Reasoning:

Root cause identified; fix agreed upon but not implemented

Suggested Action:

Set keepProcessEnv: true by default

View on GitHub →

Analysis Report

Issue Review: cloudflare/workers-sdk#8718

Summary

process.env is not populated when running tests with vitest-pool-workers, despite working in wrangler dev and deploy.

Findings

  • Created: 2025-03-29
  • Updated: 2025-10-30
  • Version: @cloudflare/vitest-pool-workers 0.7.5 → current
  • Component: vitest-pool-workers
  • Labels: bug, vitest
  • Comments: 7

Key Evidence

  • Reproduction repo: https://github.com/threepointone/repro-vitest-pool-process-env
  • Root cause identified: Vite statically replaces process.env with empty object
  • Workaround: import process from 'node:process' or set keepProcessEnv in ssr environment
  • Maintainers agreed to set keepProcessEnv: true by default for ssr environment
  • @dario-piotrowicz filed Vite bug for inheritance issue
  • No PR found that implements the agreed-upon fix

Recommendation

Status: KEEP OPEN

Reasoning: The root cause is identified and maintainers agreed on a solution (set keepProcessEnv: true by default), but no PR implementing this fix has been merged. The workaround exists but the default behavior should be fixed.

Action: Implement the agreed-upon fix: set keepProcessEnv: true by default in vitest-pool-workers for the ssr environment.

Suggested Comment

N/A - Maintainers are aware and agreed on solution.

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