From ed40935041dea29ca57fe1a0671e40a0cd2a2deb Mon Sep 17 00:00:00 2001
From: Daniel Roe <daniel@roe.dev>
Date: Sat, 18 Jul 2026 09:44:52 +0100
Subject: [PATCH 1/3] fix(config): inline config for useRuntimeConfig()
 composable

---
 examples/app-vitest-full/tests/paths.spec.ts | 11 +++++++++++
 src/module.ts                                | 18 ++++++++++++++++++
 2 files changed, 29 insertions(+)
 create mode 100644 examples/app-vitest-full/tests/paths.spec.ts

diff --git a/examples/app-vitest-full/tests/paths.spec.ts b/examples/app-vitest-full/tests/paths.spec.ts
new file mode 100644
index 000000000..6ba61c0ca
--- /dev/null
+++ b/examples/app-vitest-full/tests/paths.spec.ts
@@ -0,0 +1,11 @@
+/** @vitest-environment happy-dom */
+import { describe, expect, it } from 'vitest'
+// @ts-expect-error virtual module
+import { baseURL, buildAssetsDir } from '#internal/nuxt/paths'
+
+describe('generated paths module', () => {
+  it('resolves outside the nuxt environment', () => {
+    expect(() => baseURL()).not.toThrow()
+    expect(() => buildAssetsDir()).not.toThrow()
+  })
+})
diff --git a/src/module.ts b/src/module.ts
index 5aae81bba..28a940cd5 100644
--- a/src/module.ts
+++ b/src/module.ts
@@ -37,6 +37,24 @@ export default defineNuxtModule<NuxtVitestOptions>({
       await setupImportMocking(nuxt)
     }
 
+    // inline runtime config the way dev builds do
+    if (nuxt.options.test && !nuxt.options.dev) {
+      nuxt.hook('app:templates', (app) => {
+        const template = app.templates.find(t => t.filename === 'paths.mjs')
+        if (!template?.getContents) {
+          return
+        }
+        const original = template.getContents
+        const inlineAppConfig = JSON.stringify(nuxt.options.app)
+        template.getContents = async (data) => {
+          const contents = await original(data)
+          return contents
+            .replace(/^import \{ useRuntimeConfig \} from ['"]nitropack\/runtime['"]\n?/m, '')
+            .replace(/const getAppConfig = \(\) => useRuntimeConfig\(\)\.app/, `const getAppConfig = () => (${inlineAppConfig})`)
+        }
+      })
+    }
+
     const { addVitePlugin } = await loadKit(nuxt.options.rootDir)
 
     const resolver = createResolver(import.meta.url)

From 9dfe582d1dad3aa4a9aa85dd8a4b3036fc86048f Mon Sep 17 00:00:00 2001
From: Daniel Roe <daniel@roe.dev>
Date: Sat, 18 Jul 2026 09:53:14 +0100
Subject: [PATCH 2/3] chore: update test assertion

---
 examples/app-vitest-full/tests/resolved-files.spec.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/examples/app-vitest-full/tests/resolved-files.spec.ts b/examples/app-vitest-full/tests/resolved-files.spec.ts
index c50dd6f70..d3e49762d 100644
--- a/examples/app-vitest-full/tests/resolved-files.spec.ts
+++ b/examples/app-vitest-full/tests/resolved-files.spec.ts
@@ -20,5 +20,5 @@ test('it should include nuxt spec files', { timeout: 30000 }, async ({ onTestFin
   const regularSpecFiles = testFiles.filter(file => file.project.name === 'node')
 
   expect(nuxtSpecFiles.length).toEqual(26)
-  expect(regularSpecFiles.length).toEqual(2)
+  expect(regularSpecFiles.length).toEqual(3)
 })

From 717212d330ca31df1db91c16933def6399436dba Mon Sep 17 00:00:00 2001
From: Daniel Roe <daniel@roe.dev>
Date: Sat, 18 Jul 2026 09:53:18 +0100
Subject: [PATCH 3/3] chore: use replacer

---
 src/module.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/module.ts b/src/module.ts
index 28a940cd5..f81a437b0 100644
--- a/src/module.ts
+++ b/src/module.ts
@@ -50,7 +50,7 @@ export default defineNuxtModule<NuxtVitestOptions>({
           const contents = await original(data)
           return contents
             .replace(/^import \{ useRuntimeConfig \} from ['"]nitropack\/runtime['"]\n?/m, '')
-            .replace(/const getAppConfig = \(\) => useRuntimeConfig\(\)\.app/, `const getAppConfig = () => (${inlineAppConfig})`)
+            .replace(/const getAppConfig = \(\) => useRuntimeConfig\(\)\.app/, () => `const getAppConfig = () => (${inlineAppConfig})`)
         }
       })
     }