diff --git a/examples/mocks/package.json b/examples/mocks/package.json
index b16de7816f43..106d7e1716d4 100644
--- a/examples/mocks/package.json
+++ b/examples/mocks/package.json
@@ -19,6 +19,7 @@
   "devDependencies": {
     "@vitest/ui": "latest",
     "react": "^18.0.0",
+    "sweetalert2": "^11.6.16",
     "vite": "latest",
     "vitest": "latest",
     "vue": "^3.2.39",
diff --git a/examples/mocks/test/nested-default.spec.ts b/examples/mocks/test/nested-default.spec.ts
index e242f17ab889..aad8ea323695 100644
--- a/examples/mocks/test/nested-default.spec.ts
+++ b/examples/mocks/test/nested-default.spec.ts
@@ -1,9 +1,13 @@
 // @vitest-environment jsdom
 
+import sweetalert from 'sweetalert2'
 import * as modDefaultCjs from '../src/external/default-cjs.cjs'
 
+vi.mock('sweetalert2')
 vi.mock('../src/external/default-cjs.cjs')
 
 test('default is mocked', () => {
   expect(vi.isMockFunction(modDefaultCjs.default.fn)).toBe(true)
+  expect(vi.isMockFunction(sweetalert)).toBe(true)
+  expect(vi.isMockFunction(sweetalert.clickCancel)).toBe(true)
 })
diff --git a/packages/vite-node/src/client.ts b/packages/vite-node/src/client.ts
index 6286f0a87c40..b49d43f9dc28 100644
--- a/packages/vite-node/src/client.ts
+++ b/packages/vite-node/src/client.ts
@@ -424,14 +424,6 @@ export class ViteNodeRunner {
 
     const { mod, defaultExport } = interopModule(importedModule)
 
-    const modKeys = Reflect.ownKeys(mod)
-    let defaultKeys = !isPrimitive(defaultExport) ? Reflect.ownKeys(defaultExport) : []
-    // remove reserved keys from default keys
-    if (typeof mod !== 'function' && typeof defaultExport === 'function') {
-      const reservedKeys = ['arguments', 'caller', 'prototype', 'name', 'length']
-      defaultKeys = defaultKeys.filter(n => typeof n === 'string' && !reservedKeys.includes(n))
-    }
-
     return new Proxy(mod, {
       get(mod, prop) {
         if (prop === 'default')
@@ -443,13 +435,6 @@ export class ViteNodeRunner {
           return defaultExport !== undefined
         return prop in mod || (defaultExport && prop in defaultExport)
       },
-      // this is needed for mocker to know what is available to mock
-      ownKeys() {
-        if (!defaultExport || isPrimitive(defaultExport))
-          return modKeys
-        const allKeys = [...modKeys, 'default', ...defaultKeys]
-        return Array.from(new Set(allKeys))
-      },
       getOwnPropertyDescriptor(mod, prop) {
         const descriptor = Reflect.getOwnPropertyDescriptor(mod, prop)
         if (descriptor)
diff --git a/packages/vitest/src/runtime/mocker.ts b/packages/vitest/src/runtime/mocker.ts
index d111f0839570..4c9ba61e9d8d 100644
--- a/packages/vitest/src/runtime/mocker.ts
+++ b/packages/vitest/src/runtime/mocker.ts
@@ -224,7 +224,7 @@ export class VitestMocker {
     const mockPropertiesOf = (container: Record<Key, any>, newContainer: Record<Key, any>) => {
       const containerType = getType(container)
       const isModule = containerType === 'Module' || !!container.__esModule
-      for (const { key: property, descriptor } of getAllMockableProperties(container)) {
+      for (const { key: property, descriptor } of getAllMockableProperties(container, isModule)) {
         // Modules define their exports as getters. We want to process those.
         if (!isModule && descriptor.get) {
           try {
diff --git a/packages/vitest/src/utils/base.ts b/packages/vitest/src/utils/base.ts
index fe8765cbffb8..dd4faa6838c3 100644
--- a/packages/vitest/src/utils/base.ts
+++ b/packages/vitest/src/utils/base.ts
@@ -11,8 +11,8 @@ function collectOwnProperties(obj: any, collector: Set<string | symbol> | ((key:
   Object.getOwnPropertySymbols(obj).forEach(collect)
 }
 
-export function getAllMockableProperties(obj: any) {
-  const allProps = new Set<{ key: string | symbol; descriptor: PropertyDescriptor }>()
+export function getAllMockableProperties(obj: any, isModule: boolean) {
+  const allProps = new Map<string | symbol, { key: string | symbol; descriptor: PropertyDescriptor }>()
   let curr = obj
   do {
     // we don't need properties from these
@@ -22,11 +22,17 @@ export function getAllMockableProperties(obj: any) {
     collectOwnProperties(curr, (key) => {
       const descriptor = Object.getOwnPropertyDescriptor(curr, key)
       if (descriptor)
-        allProps.add({ key, descriptor })
+        allProps.set(key, { key, descriptor })
     })
     // eslint-disable-next-line no-cond-assign
   } while (curr = Object.getPrototypeOf(curr))
-  return Array.from(allProps)
+  // default is not specified in ownKeys, if module is interoped
+  if (isModule && !allProps.has('default') && 'default' in obj) {
+    const descriptor = Object.getOwnPropertyDescriptor(obj, 'default')
+    if (descriptor)
+      allProps.set('default', { key: 'default', descriptor })
+  }
+  return Array.from(allProps.values())
 }
 
 export function notNullish<T>(v: T | null | undefined): v is NonNullable<T> {
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 8fedf0cb7336..e5302ae48c39 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -201,6 +201,7 @@ importers:
       '@vueuse/integrations': ^8.5.0
       axios: ^0.26.1
       react: ^18.0.0
+      sweetalert2: ^11.6.16
       tinyspy: ^0.3.2
       vite: ^4.0.0
       vitest: workspace:*
@@ -213,6 +214,7 @@ importers:
     devDependencies:
       '@vitest/ui': link:../../packages/ui
       react: 18.2.0
+      sweetalert2: 11.6.16
       vite: 4.0.0
       vitest: link:../../packages/vitest
       vue: 3.2.39
@@ -19473,6 +19475,10 @@ packages:
     resolution: {integrity: sha512-ovssysQTa+luh7A5Weu3Rta6FJlFBBbInjOh722LIt6klpU2/HtdUbszju/G4devcvk8PGt7FCLv5wftu3THUA==}
     dev: true
 
+  /sweetalert2/11.6.16:
+    resolution: {integrity: sha512-T2FO8LptErsjE4r0WMfiSk4YbeUvPadNaUZ/cADMEOnws000znrf8zFX9S5e/spvzJDyRI5En73WQyDZhGypxQ==}
+    dev: true
+
   /swr/1.3.0_react@18.2.0:
     resolution: {integrity: sha512-dkghQrOl2ORX9HYrMDtPa7LTVHJjCTeZoB1dqTbnnEDlSvN8JEKpYIYurDfvbQFUUS8Cg8PceFVZNkW0KNNYPw==}
     peerDependencies: