diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index bf1996f93733..6f301a6ee5e3 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -334,6 +334,24 @@ Server-side rendering (SSR) can be complicated. The Astro package (`packages/ast
     - `server/`: Code that executes **inside Vite’s SSR.** Though this is a Node environment inside, this will be executed independently of `core/` and may have to be structured differently.
   - `vite-plugin-*/`: Any Vite plugins that Astro needs to run. For the most part, these also execute within Vite similar to `src/runtime/server/`, but it’s also helpful to think about them as independent modules. _Note: at the moment these are internal while they’re in development_
 
+### Public vs. internal API
+
+`packages/astro/package.json` declares two export maps:
+
+- `"exports"` — the monorepo view. Includes public entries plus `./_internal/*` subpaths for use by other workspace packages.
+- `"publishConfig.exports"` — the npm view. [pnpm replaces `"exports"` with this at publish time](https://pnpm.io/package_json#publishconfig), so `_internal/*` entries never ship.
+
+Other workspace packages should import internals via the subpath, not a deep relative path:
+
+```ts
+// Do this
+import { loadFixture } from 'astro/_internal/test/test-utils';
+// Not tihs
+import { loadFixture } from '../../../astro/test/test-utils.js';
+```
+
+To add a new internal entry, add the `./_internal/*` key to `"exports"` only — not to `"publishConfig.exports"`.
+
 ### Thinking about SSR
 
 There are 3 contexts in which code executes:
diff --git a/packages/astro/package.json b/packages/astro/package.json
index f264f2f69645..0d38915096b6 100644
--- a/packages/astro/package.json
+++ b/packages/astro/package.json
@@ -81,7 +81,11 @@
     "./zod": "./dist/zod.js",
     "./errors": "./dist/core/errors/userError.js",
     "./middleware": "./dist/core/middleware/index.js",
-    "./virtual-modules/*": "./dist/virtual-modules/*"
+    "./virtual-modules/*": "./dist/virtual-modules/*",
+    "./_internal/assets": "./dist/assets/internal.js",
+    "./_internal/logger": "./dist/core/logger/core.js",
+    "./_internal/test/test-adapter": "./test/test-adapter.js",
+    "./_internal/test/test-utils": "./test/test-utils.js"
   },
   "bin": {
     "astro": "./bin/astro.mjs"
@@ -217,6 +221,63 @@
     "pnpm": ">=7.1.0"
   },
   "publishConfig": {
+    "exports": {
+      ".": "./dist/index.js",
+      "./env": "./env.d.ts",
+      "./env/runtime": "./dist/env/runtime.js",
+      "./env/setup": "./dist/env/setup.js",
+      "./types": "./types.d.ts",
+      "./client": "./client.d.ts",
+      "./astro-jsx": "./astro-jsx.d.ts",
+      "./tsconfigs/*.json": "./tsconfigs/*",
+      "./tsconfigs/*": "./tsconfigs/*.json",
+      "./jsx/rehype.js": "./dist/jsx/rehype.js",
+      "./jsx-runtime": {
+        "types": "./jsx-runtime.d.ts",
+        "default": "./dist/jsx-runtime/index.js"
+      },
+      "./jsx-dev-runtime": {
+        "types": "./jsx-runtime.d.ts",
+        "default": "./dist/jsx-runtime/index.js"
+      },
+      "./compiler-runtime": "./dist/runtime/compiler/index.js",
+      "./runtime/*": "./dist/runtime/*",
+      "./config": "./dist/config/entrypoint.js",
+      "./container": "./dist/container/index.js",
+      "./app": "./dist/core/app/entrypoints/index.js",
+      "./app/node": "./dist/core/app/entrypoints/node.js",
+      "./app/entrypoint": "./dist/core/app/entrypoints/virtual/index.js",
+      "./app/entrypoint/dev": "./dist/core/app/entrypoints/virtual/dev.js",
+      "./app/entrypoint/prod": "./dist/core/app/entrypoints/virtual/prod.js",
+      "./app/manifest": "./dist/core/app/entrypoints/manifest.js",
+      "./entrypoints/prerender": "./dist/entrypoints/prerender.js",
+      "./entrypoints/legacy": "./dist/entrypoints/legacy.js",
+      "./client/*": "./dist/runtime/client/*",
+      "./components": "./components/index.ts",
+      "./components/*": "./components/*",
+      "./toolbar": "./dist/toolbar/index.js",
+      "./actions/runtime/entrypoints/*": "./dist/actions/runtime/entrypoints/*",
+      "./assets": "./dist/assets/index.js",
+      "./assets/runtime": "./dist/assets/runtime.js",
+      "./assets/utils": "./dist/assets/utils/index.js",
+      "./assets/utils/node": "./dist/assets/utils/node.js",
+      "./assets/utils/inferRemoteSize.js": "./dist/assets/utils/remoteProbe.js",
+      "./assets/endpoint/*": "./dist/assets/endpoint/*.js",
+      "./assets/services/sharp": "./dist/assets/services/sharp.js",
+      "./assets/services/noop": "./dist/assets/services/noop.js",
+      "./cache/memory": "./dist/core/cache/memory-provider.js",
+      "./assets/fonts/runtime.js": "./dist/assets/fonts/runtime.js",
+      "./loaders": "./dist/content/loaders/index.js",
+      "./content/config": "./dist/content/config.js",
+      "./content/runtime": "./dist/content/runtime.js",
+      "./content/runtime-assets": "./dist/content/runtime-assets.js",
+      "./debug": "./components/Debug.astro",
+      "./package.json": "./package.json",
+      "./zod": "./dist/zod.js",
+      "./errors": "./dist/core/errors/userError.js",
+      "./middleware": "./dist/core/middleware/index.js",
+      "./virtual-modules/*": "./dist/virtual-modules/*"
+    },
     "provenance": true
   },
   "funding": {
diff --git a/packages/astro/test/exports.test.ts b/packages/astro/test/exports.test.ts
new file mode 100644
index 000000000000..5b5cb79c400e
--- /dev/null
+++ b/packages/astro/test/exports.test.ts
@@ -0,0 +1,13 @@
+import assert from 'node:assert/strict';
+import { it } from 'node:test';
+
+it('"exports" and "publishConfig.exports" should be the same except for internal API', async () => {
+	const { default: pkgJson } = await import('../package.json', { with: { type: 'json' } });
+	const exports: Record<string, unknown> = pkgJson.exports;
+	const publishConfigExports: Record<string, unknown> = pkgJson.publishConfig.exports;
+	const internal = Object.keys(exports).filter((key) => key.startsWith('./_internal/'));
+	for (const key of internal) {
+		delete exports[key];
+	}
+	assert.deepEqual(exports, publishConfigExports);
+});
diff --git a/packages/db/test/basics.test.ts b/packages/db/test/basics.test.ts
index 2e9d349d6bbe..88810f2e8f1f 100644
--- a/packages/db/test/basics.test.ts
+++ b/packages/db/test/basics.test.ts
@@ -1,7 +1,7 @@
 import assert from 'node:assert/strict';
 import { after, before, describe, it } from 'node:test';
 import { load as cheerioLoad } from 'cheerio';
-import testAdapter from '../../astro/test/test-adapter.js';
+import testAdapter from 'astro/_internal/test/test-adapter';
 import {
 	clearEnvironment,
 	type DevServer,
diff --git a/packages/db/test/db-in-src.test.ts b/packages/db/test/db-in-src.test.ts
index f9c5fc44ac1d..50ad8bc1270c 100644
--- a/packages/db/test/db-in-src.test.ts
+++ b/packages/db/test/db-in-src.test.ts
@@ -1,7 +1,7 @@
 import assert from 'node:assert/strict';
 import { after, before, describe, it } from 'node:test';
 import { load as cheerioLoad } from 'cheerio';
-import testAdapter from '../../astro/test/test-adapter.js';
+import testAdapter from 'astro/_internal/test/test-adapter';
 import { type DevServer, type Fixture, loadFixture } from './test-utils.ts';
 
 describe('astro:db', () => {
diff --git a/packages/db/test/libsql-remote.test.ts b/packages/db/test/libsql-remote.test.ts
index 5d11b7325f72..17bf08a9a890 100644
--- a/packages/db/test/libsql-remote.test.ts
+++ b/packages/db/test/libsql-remote.test.ts
@@ -3,7 +3,7 @@ import { rm } from 'node:fs/promises';
 import { relative } from 'node:path';
 import { after, before, describe, it } from 'node:test';
 import { fileURLToPath } from 'node:url';
-import testAdapter from '../../astro/test/test-adapter.js';
+import testAdapter from 'astro/_internal/test/test-adapter';
 import { clearEnvironment, type Fixture, initializeRemoteDb, loadFixture } from './test-utils.ts';
 
 describe('astro:db local database', () => {
diff --git a/packages/db/test/local-prod.test.ts b/packages/db/test/local-prod.test.ts
index 8e610991c930..e4d989e4e514 100644
--- a/packages/db/test/local-prod.test.ts
+++ b/packages/db/test/local-prod.test.ts
@@ -2,7 +2,7 @@ import assert from 'node:assert/strict';
 import { relative } from 'node:path';
 import { after, before, describe, it } from 'node:test';
 import { fileURLToPath } from 'node:url';
-import testAdapter from '../../astro/test/test-adapter.js';
+import testAdapter from 'astro/_internal/test/test-adapter';
 import { type Fixture, loadFixture } from './test-utils.ts';
 
 describe('astro:db local database', () => {
diff --git a/packages/db/test/ssr-no-apptoken.test.ts b/packages/db/test/ssr-no-apptoken.test.ts
index c7a66b987ab0..5e140f3193ec 100644
--- a/packages/db/test/ssr-no-apptoken.test.ts
+++ b/packages/db/test/ssr-no-apptoken.test.ts
@@ -1,6 +1,6 @@
 import assert from 'node:assert/strict';
 import { after, before, describe, it } from 'node:test';
-import testAdapter from '../../astro/test/test-adapter.js';
+import testAdapter from 'astro/_internal/test/test-adapter';
 import { type Fixture, loadFixture, type RemoteDbServer, setupRemoteDb } from './test-utils.ts';
 
 describe('missing app token', () => {
diff --git a/packages/db/test/test-utils.ts b/packages/db/test/test-utils.ts
index e6c36cb9ae81..0c799077a48a 100644
--- a/packages/db/test/test-utils.ts
+++ b/packages/db/test/test-utils.ts
@@ -10,7 +10,7 @@ export {
 	loadFixture,
 	type DevServer,
 	type Fixture,
-} from '../../astro/test/test-utils.js';
+} from 'astro/_internal/test/test-utils';
 
 const isWindows = process.platform === 'win32';
 
diff --git a/packages/integrations/alpinejs/test/test-utils.ts b/packages/integrations/alpinejs/test/test-utils.ts
index 16c57ff68553..7fe403665fdc 100644
--- a/packages/integrations/alpinejs/test/test-utils.ts
+++ b/packages/integrations/alpinejs/test/test-utils.ts
@@ -7,7 +7,7 @@ import {
 	type Fixture,
 	type AstroInlineConfig,
 	type DevServer,
-} from '../../../astro/test/test-utils.js';
+} from 'astro/_internal/test/test-utils';
 
 // Get all test files in directory, assign unique port for each of them so they don't conflict
 const testFiles = await fs.readdir(new URL('.', import.meta.url));
diff --git a/packages/integrations/cloudflare/test/ssr-deps.test.ts b/packages/integrations/cloudflare/test/ssr-deps.test.ts
index 1087b7b3fe16..de6c9a22dd73 100644
--- a/packages/integrations/cloudflare/test/ssr-deps.test.ts
+++ b/packages/integrations/cloudflare/test/ssr-deps.test.ts
@@ -3,7 +3,7 @@ import { rmSync } from 'node:fs';
 import { Writable } from 'node:stream';
 import { after, before, describe, it } from 'node:test';
 import { fileURLToPath } from 'node:url';
-import { AstroLogger } from '../../../astro/dist/core/logger/core.js';
+import { AstroLogger } from 'astro/_internal/logger';
 import { type DevServer, type Fixture, loadFixture } from './test-utils.ts';
 
 describe('SSR dependencies', () => {
diff --git a/packages/integrations/cloudflare/test/test-utils.ts b/packages/integrations/cloudflare/test/test-utils.ts
index 8cd5dafda333..b701e3e05985 100644
--- a/packages/integrations/cloudflare/test/test-utils.ts
+++ b/packages/integrations/cloudflare/test/test-utils.ts
@@ -1,10 +1,10 @@
-import type { DevServer } from '../../../astro/src/core/dev/dev.js';
-import type { PreviewServer } from '../../../astro/src/types/public/preview.js';
+import type { PreviewServer } from 'astro';
 import {
+	loadFixture as baseLoadFixture,
 	type AstroInlineConfig,
+	type DevServer,
 	type Fixture,
-	loadFixture as baseLoadFixture,
-} from '../../../astro/test/test-utils.js';
+} from 'astro/_internal/test/test-utils';
 
 export type { AstroInlineConfig, DevServer, Fixture, PreviewServer };
 
diff --git a/packages/integrations/cloudflare/test/top-level-return.test.ts b/packages/integrations/cloudflare/test/top-level-return.test.ts
index d5a9132d3690..7ef78bad0441 100644
--- a/packages/integrations/cloudflare/test/top-level-return.test.ts
+++ b/packages/integrations/cloudflare/test/top-level-return.test.ts
@@ -4,7 +4,7 @@ import { Writable } from 'node:stream';
 import { type Fixture, loadFixture } from './test-utils.ts';
 import assert from 'node:assert/strict';
 import { fileURLToPath } from 'node:url';
-import { AstroLogger } from '../../../astro/dist/core/logger/core.js';
+import { AstroLogger } from 'astro/_internal/logger';
 
 describe('Top-level Return', () => {
 	let fixture: Fixture;
diff --git a/packages/integrations/cloudflare/test/with-base.test.ts b/packages/integrations/cloudflare/test/with-base.test.ts
index 738c2cd3bcd7..eb0cd4398a1c 100644
--- a/packages/integrations/cloudflare/test/with-base.test.ts
+++ b/packages/integrations/cloudflare/test/with-base.test.ts
@@ -3,7 +3,7 @@ import { rmSync } from 'node:fs';
 import { Writable } from 'node:stream';
 import { after, before, describe, it } from 'node:test';
 import { type Fixture, loadFixture } from './test-utils.ts';
-import { AstroLogger } from '../../../astro/dist/core/logger/core.js';
+import { AstroLogger } from 'astro/_internal/logger';
 import { fileURLToPath } from 'node:url';
 
 describe('base', () => {
diff --git a/packages/integrations/cloudflare/test/with-react.test.ts b/packages/integrations/cloudflare/test/with-react.test.ts
index 4a91a6c796bb..ca91a96dd3e4 100644
--- a/packages/integrations/cloudflare/test/with-react.test.ts
+++ b/packages/integrations/cloudflare/test/with-react.test.ts
@@ -4,7 +4,7 @@ import { Writable } from 'node:stream';
 import { after, before, describe, it } from 'node:test';
 import * as cheerio from 'cheerio';
 import { type Fixture, loadFixture, type PreviewServer } from './test-utils.ts';
-import { AstroLogger } from '../../../astro/dist/core/logger/core.js';
+import { AstroLogger } from 'astro/_internal/logger';
 import { fileURLToPath } from 'node:url';
 
 describe('React', () => {
diff --git a/packages/integrations/markdoc/test/test-utils.ts b/packages/integrations/markdoc/test/test-utils.ts
index c5bab863cbd0..1d9c361c78de 100644
--- a/packages/integrations/markdoc/test/test-utils.ts
+++ b/packages/integrations/markdoc/test/test-utils.ts
@@ -3,4 +3,4 @@ export {
 	loadFixture,
 	type DevServer,
 	type Fixture,
-} from '../../../astro/test/test-utils.js';
+} from 'astro/_internal/test/test-utils';
diff --git a/packages/integrations/mdx/test/test-utils.ts b/packages/integrations/mdx/test/test-utils.ts
index f0b6232c5535..c00b4854f2dd 100644
--- a/packages/integrations/mdx/test/test-utils.ts
+++ b/packages/integrations/mdx/test/test-utils.ts
@@ -2,17 +2,14 @@ import type * as estree from 'estree';
 import type * as hast from 'hast';
 import type * as mdast from 'mdast';
 import type * as unified from 'unified';
-import {
-	AstroIntegrationLogger,
-	type AstroLogMessage,
-} from '../../../astro/dist/core/logger/core.js';
+import { AstroIntegrationLogger, type AstroLogMessage } from 'astro/_internal/logger';
 
 export {
 	loadFixture,
 	type AstroInlineConfig,
 	type DevServer,
 	type Fixture,
-} from '../../../astro/test/test-utils.js';
+} from 'astro/_internal/test/test-utils';
 
 export type RemarkPlugin<PluginParameters extends any[] = any[]> = unified.Plugin<
 	PluginParameters,
diff --git a/packages/integrations/netlify/src/image-service.ts b/packages/integrations/netlify/src/image-service.ts
index f8e93a05abdc..f74c144c081b 100644
--- a/packages/integrations/netlify/src/image-service.ts
+++ b/packages/integrations/netlify/src/image-service.ts
@@ -1,6 +1,6 @@
 import type { ExternalImageService } from 'astro';
 import { baseService } from 'astro/assets';
-import { verifyOptions } from '../../../astro/dist/assets/internal.js';
+import { verifyOptions } from 'astro/_internal/assets';
 import { isESMImportedImage } from 'astro/assets/utils';
 import { AstroError } from 'astro/errors';
 
diff --git a/packages/integrations/netlify/test/test-utils.ts b/packages/integrations/netlify/test/test-utils.ts
index 3f1f0bbdb101..46be9b19aa06 100644
--- a/packages/integrations/netlify/test/test-utils.ts
+++ b/packages/integrations/netlify/test/test-utils.ts
@@ -3,11 +3,8 @@ import {
 	type AstroInlineConfig,
 	type Fixture,
 	loadFixture as baseLoadFixture,
-} from '../../../astro/test/test-utils.js';
-import {
-	AstroIntegrationLogger,
-	type AstroLogMessage,
-} from '../../../astro/dist/core/logger/core.js';
+} from 'astro/_internal/test/test-utils';
+import { AstroIntegrationLogger, type AstroLogMessage } from 'astro/_internal/logger';
 
 export type { AstroInlineConfig, DevServer, Fixture };
 
diff --git a/packages/integrations/node/test/api-route.test.ts b/packages/integrations/node/test/api-route.test.ts
index 26e26d0fe8bc..36ff88bfa94d 100644
--- a/packages/integrations/node/test/api-route.test.ts
+++ b/packages/integrations/node/test/api-route.test.ts
@@ -1,7 +1,7 @@
 import * as assert from 'node:assert/strict';
 import crypto from 'node:crypto';
 import { after, before, describe, it } from 'node:test';
-import type { PreviewServer } from '../../../astro/src/types/public/preview.js';
+import type { PreviewServer } from 'astro';
 import nodejs from '../dist/index.js';
 import { createRequestAndResponse, type Fixture, loadFixture } from './test-utils.ts';
 
diff --git a/packages/integrations/node/test/assets.test.ts b/packages/integrations/node/test/assets.test.ts
index e7682ef7b65e..3907f7807b02 100644
--- a/packages/integrations/node/test/assets.test.ts
+++ b/packages/integrations/node/test/assets.test.ts
@@ -1,7 +1,7 @@
 import * as assert from 'node:assert/strict';
 import { after, before, describe, it } from 'node:test';
 import { fileURLToPath } from 'node:url';
-import type { PreviewServer } from '../../../astro/src/types/public/preview.js';
+import type { PreviewServer } from 'astro';
 import * as cheerio from 'cheerio';
 import nodejs from '../dist/index.js';
 import { type Fixture, loadFixture } from './test-utils.ts';
diff --git a/packages/integrations/node/test/bad-urls.test.ts b/packages/integrations/node/test/bad-urls.test.ts
index fc45bef3fa4a..ea47790125a9 100644
--- a/packages/integrations/node/test/bad-urls.test.ts
+++ b/packages/integrations/node/test/bad-urls.test.ts
@@ -1,6 +1,6 @@
 import * as assert from 'node:assert/strict';
 import { after, before, describe, it } from 'node:test';
-import type { PreviewServer } from '../../../astro/src/types/public/preview.js';
+import type { PreviewServer } from 'astro';
 import nodejs from '../dist/index.js';
 import { type Fixture, loadFixture } from './test-utils.ts';
 
diff --git a/packages/integrations/node/test/image.test.ts b/packages/integrations/node/test/image.test.ts
index f6d4389423f5..21bdcc150a74 100644
--- a/packages/integrations/node/test/image.test.ts
+++ b/packages/integrations/node/test/image.test.ts
@@ -2,7 +2,7 @@ import * as assert from 'node:assert/strict';
 import { cp, rm } from 'node:fs/promises';
 import { after, before, describe, it } from 'node:test';
 import { fileURLToPath } from 'node:url';
-import type { PreviewServer } from '../../../astro/src/types/public/preview.js';
+import type { PreviewServer } from 'astro';
 import { inferRemoteSize } from 'astro/assets/utils/inferRemoteSize.js';
 import * as cheerio from 'cheerio';
 import nodejs from '../dist/index.js';
diff --git a/packages/integrations/node/test/prerendered-error-page-fetch.test.ts b/packages/integrations/node/test/prerendered-error-page-fetch.test.ts
index 9fb6c6110f89..30b5080f7374 100644
--- a/packages/integrations/node/test/prerendered-error-page-fetch.test.ts
+++ b/packages/integrations/node/test/prerendered-error-page-fetch.test.ts
@@ -1,6 +1,6 @@
 import * as assert from 'node:assert/strict';
 import { after, before, describe, it } from 'node:test';
-import type { PreviewServer } from '../../../astro/src/types/public/preview.js';
+import type { PreviewServer } from 'astro';
 import node from '../dist/index.js';
 import { type Fixture, loadFixture } from './test-utils.ts';
 
diff --git a/packages/integrations/node/test/preview-headers.test.ts b/packages/integrations/node/test/preview-headers.test.ts
index 449d9657b4c3..ebf9f8b588b8 100644
--- a/packages/integrations/node/test/preview-headers.test.ts
+++ b/packages/integrations/node/test/preview-headers.test.ts
@@ -1,6 +1,6 @@
 import * as assert from 'node:assert/strict';
 import { after, before, describe, it } from 'node:test';
-import type { PreviewServer } from '../../../astro/src/types/public/preview.js';
+import type { PreviewServer } from 'astro';
 import nodejs from '../dist/index.js';
 import { type Fixture, loadFixture } from './test-utils.ts';
 
diff --git a/packages/integrations/node/test/sessions.test.ts b/packages/integrations/node/test/sessions.test.ts
index 9cee8bae9403..f6645c8b5b9b 100644
--- a/packages/integrations/node/test/sessions.test.ts
+++ b/packages/integrations/node/test/sessions.test.ts
@@ -1,6 +1,6 @@
 import assert from 'node:assert/strict';
 import { after, before, describe, it } from 'node:test';
-import type { PreviewServer } from '../../../astro/src/types/public/preview.js';
+import type { PreviewServer } from 'astro';
 import * as devalue from 'devalue';
 import nodejs from '../dist/index.js';
 import { type Fixture, loadFixture, type DevServer } from './test-utils.ts';
diff --git a/packages/integrations/node/test/test-utils.ts b/packages/integrations/node/test/test-utils.ts
index 3fea903844cd..be4b745900d1 100644
--- a/packages/integrations/node/test/test-utils.ts
+++ b/packages/integrations/node/test/test-utils.ts
@@ -7,7 +7,7 @@ import {
 	type AdapterServer,
 	type DevServer,
 	loadFixture as baseLoadFixture,
-} from '../../../astro/test/test-utils.js';
+} from 'astro/_internal/test/test-utils';
 import type * as express from 'express';
 
 process.env.ASTRO_NODE_AUTOSTART = 'disabled';
diff --git a/packages/integrations/node/test/well-known-locations.test.ts b/packages/integrations/node/test/well-known-locations.test.ts
index a8afdd1519b4..e49aa71c25ab 100644
--- a/packages/integrations/node/test/well-known-locations.test.ts
+++ b/packages/integrations/node/test/well-known-locations.test.ts
@@ -1,6 +1,6 @@
 import * as assert from 'node:assert/strict';
 import { after, before, describe, it } from 'node:test';
-import type { PreviewServer } from '../../../astro/src/types/public/preview.js';
+import type { PreviewServer } from 'astro';
 import nodejs from '../dist/index.js';
 import { createRequestAndResponse, type Fixture, loadFixture } from './test-utils.ts';
 
diff --git a/packages/integrations/react/test/test-utils.ts b/packages/integrations/react/test/test-utils.ts
index 61971c3682aa..56ba3876eb10 100644
--- a/packages/integrations/react/test/test-utils.ts
+++ b/packages/integrations/react/test/test-utils.ts
@@ -3,4 +3,4 @@ export {
 	loadFixture,
 	type DevServer,
 	type Fixture,
-} from '../../../astro/test/test-utils.js';
+} from 'astro/_internal/test/test-utils';
diff --git a/packages/integrations/sitemap/test/test-utils.ts b/packages/integrations/sitemap/test/test-utils.ts
index 818da9b3ac6e..53effd69151b 100644
--- a/packages/integrations/sitemap/test/test-utils.ts
+++ b/packages/integrations/sitemap/test/test-utils.ts
@@ -3,7 +3,7 @@ import {
 	type AstroInlineConfig,
 	type Fixture,
 	loadFixture as baseLoadFixture,
-} from '../../../astro/test/test-utils.js';
+} from 'astro/_internal/test/test-utils';
 
 export type { AstroInlineConfig, Fixture };
 
diff --git a/packages/integrations/svelte/test/test-utils.ts b/packages/integrations/svelte/test/test-utils.ts
index bd1b97b95d32..a34a5d275dc3 100644
--- a/packages/integrations/svelte/test/test-utils.ts
+++ b/packages/integrations/svelte/test/test-utils.ts
@@ -3,4 +3,4 @@ export {
 	loadFixture,
 	type DevServer,
 	type Fixture,
-} from '../../../astro/test/test-utils.js';
+} from 'astro/_internal/test/test-utils';
diff --git a/packages/integrations/vercel/test/test-utils.ts b/packages/integrations/vercel/test/test-utils.ts
index 06cad424e9aa..fe887e2d0199 100644
--- a/packages/integrations/vercel/test/test-utils.ts
+++ b/packages/integrations/vercel/test/test-utils.ts
@@ -3,7 +3,7 @@ import {
 	type Fixture,
 	type DevServer,
 	type AstroInlineConfig,
-} from '../../../astro/test/test-utils.js';
+} from 'astro/_internal/test/test-utils';
 
 export type { Fixture, DevServer, AstroInlineConfig };
 
diff --git a/packages/integrations/vue/test/test-utils.ts b/packages/integrations/vue/test/test-utils.ts
index b1dfb1c36148..de7d963dbcf9 100644
--- a/packages/integrations/vue/test/test-utils.ts
+++ b/packages/integrations/vue/test/test-utils.ts
@@ -4,7 +4,7 @@ import {
 	type Fixture,
 	type DevServer,
 	type AstroInlineConfig,
-} from '../../../astro/test/test-utils.js';
+} from 'astro/_internal/test/test-utils';
 
 export { cli };
 export type { Fixture, DevServer };
diff --git a/packages/language-tools/language-server/test/setup.ts b/packages/language-tools/language-server/test/setup.ts
index 87def362bab0..b746a8d44035 100644
--- a/packages/language-tools/language-server/test/setup.ts
+++ b/packages/language-tools/language-server/test/setup.ts
@@ -1,6 +1,6 @@
 import path from 'node:path';
 import { fileURLToPath } from 'node:url';
-import { cli } from '../../../astro/test/test-utils.js';
+import { cli } from 'astro/_internal/test/test-utils';
 
 // Copied from utils.ts so we don't have to import TS code for Node 20
 const __filename = fileURLToPath(import.meta.url);