vitest-dev
diff --git a/‎packages/browser/src/node/index.ts‎
Lines changed: 1 addition & 2 deletions b/‎packages/browser/src/node/index.ts‎
Lines changed: 1 addition & 2 deletions
diff --git a/‎test/e2e/test/config/browser-configs.test.ts‎
Lines changed: 15 additions & 0 deletions b/‎test/e2e/test/config/browser-configs.test.ts‎
Lines changed: 15 additions & 0 deletions
@@ -456,11 +456,9 @@ function resolveBrowserOptimizeDeps(
   // - vitest/browser, @vitest/browser/context, @vitest/browser/utils are
   //   VIRTUAL modules generated per-server (see pluginContext.ts) — optimizer
   //   cannot resolve/run their `load`, it would freeze stale/empty content.
-  // - vite/module-runner is small enough to not need pre-bundling.
   // - msw is a large, side-effectful service-worker library.
   const exclude = [
     'vitest/browser',
-    'vite/module-runner',
     '@vitest/browser/utils',
     '@vitest/browser/context',
     'msw',
@@ -504,6 +502,7 @@ function resolveBrowserOptimizeDeps(
     'vitest > expect-type',
     'vitest > magic-string',
     'vitest > chai',
+    'vitest > vite/module-runner',
     'vitest',
     'vitest/internal/browser',
     '@vitest/browser/client',
 
@@ -105,6 +105,21 @@ test('does not disable pre-transform requests in browser mode', async () => {
   })
 })
 
+test('pre-bundles vite module runner through vitest in browser mode', async () => {
+  const v = await vitest({
+    browser: {
+      enabled: true,
+      provider: preview(),
+      instances: [
+        { browser: 'chromium' },
+      ],
+    },
+  })
+
+  expect(v.vite.config.optimizeDeps.include).toContain('vitest > vite/module-runner')
+  expect(v.vite.config.optimizeDeps.exclude).not.toContain('vite/module-runner')
+})
+
 test('disables pre-transform requests in node mode', async () => {
   expect(await observePreTransformRequests()).toEqual({
     client: false,