Vue Router warning when page / is not defined

[JBustin]

Environment

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• Operating System: Darwin
• Node Version: v22.14.0
• Nuxt Version: 3.17.7
• CLI Version: 3.26.2
• Nitro Version: 2.12.2
• Package Manager: npm@11.2.0
• Builder: -
• User Config: compatibilityDate, devtools, modules
• Runtime Modules: @nuxt/test-utils/module@3.19.2
• Build Modules: -

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Reproduction

https://github.com/JBustin/nuxt3-test-utils

Sorry, I would like to share a reproduction on Stackblitz, but I failed to get an effective install of nuxt3 + @nuxt/test-utils: https://stackblitz.com/edit/nuxt-starter-mygjuknd?file=package.json

Describe the bug

If I don't have any / page, we experiment some router warnings during test.

stderr | components/Header.nuxt.spec.ts
[Vue Router warn]: No match found for location with path "/"

stderr | components/Header.nuxt.spec.ts
[Vue Router warn]: No match found for location with path "/"

stderr | components/Header.nuxt.spec.ts
[nuxt] error caught during app initialization H3Error: Page not found: /

Additional context

Additionally, we expect to be able to mock the current route during the tests, because we have some different behavior regarding the format of the current route.