`nuxt/test-utils` not working with `vitest@4` browser mode

[OrbisK]

Environment

• Operating System: Linux
• Node Version: v23.5.0
• Nuxt Version: 4.1.3
• CLI Version: 3.29.0
• Nitro Version: 2.12.6
• Package Manager: pnpm@10.18.1
• Builder: -
• User Config: devtools, app, compatibilityDate
• Runtime Modules: -
• Build Modules: -

Reproduction

https://github.com/OrbisK/test-utils-fork/tree/reproduction/vitest-v4

Describe the bug

all tests are failing with `Cannot read properties of undefined (reading 'idToModuleMap')

Additional context

1. pnpm i
2. pnpm dev:prepare
3. cd examples/app-vitest-browser
4. pnpm test

Logs

Error: Failed to import test file *****/test-utils/src/runtime/entry.ts
Caused by: TypeError: Cannot read properties of undefined (reading 'idToModuleMap')

[OrbisK]

commenting out this:

test-utils/src/runtime/entry.ts

Line 10 in dc29ca9

vi.resetModules()

"solves" the error

[OrbisK]

vitest-dev/vitest#8877 does fix the issue. Waiting for it to be released.