diff --git a/packages/@lwc/babel-plugin-component/src/__tests__/index.spec.ts b/packages/@lwc/babel-plugin-component/src/__tests__/index.spec.ts
index 4980065a24..2a0ccc41ec 100644
--- a/packages/@lwc/babel-plugin-component/src/__tests__/index.spec.ts
+++ b/packages/@lwc/babel-plugin-component/src/__tests__/index.spec.ts
@@ -5,6 +5,7 @@
  * For full license text, see the LICENSE file in the repo root or https://opensource.org/licenses/MIT
  */
 import path from 'node:path';
+import { describe } from 'vitest';
 import { transformSync } from '@babel/core';
 import { LWC_VERSION, HIGHEST_API_VERSION } from '@lwc/shared';
 import { testFixtureDir } from '@lwc/test-utils-lwc-internals';
diff --git a/packages/@lwc/compiler/src/transformers/__tests__/transform-css.spec.ts b/packages/@lwc/compiler/src/transformers/__tests__/transform-css.spec.ts
index 57e5204f7c..21f0d19d51 100644
--- a/packages/@lwc/compiler/src/transformers/__tests__/transform-css.spec.ts
+++ b/packages/@lwc/compiler/src/transformers/__tests__/transform-css.spec.ts
@@ -4,6 +4,7 @@
  * SPDX-License-Identifier: MIT
  * For full license text, see the LICENSE file in the repo root or https://opensource.org/licenses/MIT
  */
+import { describe, expect, it } from 'vitest';
 import { TransformOptions } from '../../options';
 import { transform } from '../transformer';
 
diff --git a/packages/@lwc/compiler/src/transformers/__tests__/transform-html.spec.ts b/packages/@lwc/compiler/src/transformers/__tests__/transform-html.spec.ts
index 26f856843d..d4e6d42d33 100644
--- a/packages/@lwc/compiler/src/transformers/__tests__/transform-html.spec.ts
+++ b/packages/@lwc/compiler/src/transformers/__tests__/transform-html.spec.ts
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: MIT
  * For full license text, see the LICENSE file in the repo root or https://opensource.org/licenses/MIT
  */
-import { vi } from 'vitest';
+import { vi, describe, it, expect } from 'vitest';
 import { APIVersion, noop } from '@lwc/shared';
 import { TransformOptions } from '../../options';
 import { transformSync } from '../transformer';
diff --git a/packages/@lwc/compiler/src/transformers/__tests__/transform-javascript.spec.ts b/packages/@lwc/compiler/src/transformers/__tests__/transform-javascript.spec.ts
index 357de4090d..ebae03d6a7 100644
--- a/packages/@lwc/compiler/src/transformers/__tests__/transform-javascript.spec.ts
+++ b/packages/@lwc/compiler/src/transformers/__tests__/transform-javascript.spec.ts
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: MIT
  * For full license text, see the LICENSE file in the repo root or https://opensource.org/licenses/MIT
  */
-import { vi } from 'vitest';
+import { vi, describe, it, expect } from 'vitest';
 import { noop } from '@lwc/shared';
 import { TransformOptions } from '../../options';
 import { transform, transformSync } from '../transformer';
diff --git a/packages/@lwc/compiler/src/transformers/__tests__/transform.spec.ts b/packages/@lwc/compiler/src/transformers/__tests__/transform.spec.ts
index 2c1717692a..378b72adad 100755
--- a/packages/@lwc/compiler/src/transformers/__tests__/transform.spec.ts
+++ b/packages/@lwc/compiler/src/transformers/__tests__/transform.spec.ts
@@ -4,6 +4,7 @@
  * SPDX-License-Identifier: MIT
  * For full license text, see the LICENSE file in the repo root or https://opensource.org/licenses/MIT
  */
+import { describe, it, expect } from 'vitest';
 import { transform, transformSync } from '../../transformers/transformer';
 
 function testValidateOptions(methodName: string, method: any) {
diff --git a/packages/@lwc/engine-core/src/libs/mutation-tracker/__tests__/index.spec.ts b/packages/@lwc/engine-core/src/libs/mutation-tracker/__tests__/index.spec.ts
index 7eea66eeeb..342d4fd141 100644
--- a/packages/@lwc/engine-core/src/libs/mutation-tracker/__tests__/index.spec.ts
+++ b/packages/@lwc/engine-core/src/libs/mutation-tracker/__tests__/index.spec.ts
@@ -4,6 +4,7 @@
  * SPDX-License-Identifier: MIT
  * For full license text, see the LICENSE file in the repo root or https://opensource.org/licenses/MIT
  */
+import { describe, it, expect } from 'vitest';
 import { ReactiveObserver, valueMutated, valueObserved } from '../index';
 
 describe('reactive-service', () => {
diff --git a/packages/@lwc/engine-dom/src/formatters/__tests__/component.spec.ts b/packages/@lwc/engine-dom/src/formatters/__tests__/component.spec.ts
index b08e571698..975a17c77d 100644
--- a/packages/@lwc/engine-dom/src/formatters/__tests__/component.spec.ts
+++ b/packages/@lwc/engine-dom/src/formatters/__tests__/component.spec.ts
@@ -4,6 +4,7 @@
  * SPDX-License-Identifier: MIT
  * For full license text, see the LICENSE file in the repo root or https://opensource.org/licenses/MIT
  */
+import { describe, it, expect } from 'vitest';
 import {
     createElement,
     LightningElement,
diff --git a/packages/@lwc/engine-server/src/__tests__/create-element.spec.ts b/packages/@lwc/engine-server/src/__tests__/create-element.spec.ts
index 029e27cf2f..b05f27dfa6 100644
--- a/packages/@lwc/engine-server/src/__tests__/create-element.spec.ts
+++ b/packages/@lwc/engine-server/src/__tests__/create-element.spec.ts
@@ -4,6 +4,7 @@
  * SPDX-License-Identifier: MIT
  * For full license text, see the LICENSE file in the repo root or https://opensource.org/licenses/MIT
  */
+import { describe, it, expect } from 'vitest';
 import { createElement } from '../index';
 
 describe('createElement', () => {
diff --git a/packages/@lwc/engine-server/src/__tests__/fixtures.spec.ts b/packages/@lwc/engine-server/src/__tests__/fixtures.spec.ts
index adcf29e356..a7ab4db836 100755
--- a/packages/@lwc/engine-server/src/__tests__/fixtures.spec.ts
+++ b/packages/@lwc/engine-server/src/__tests__/fixtures.spec.ts
@@ -5,11 +5,10 @@
  * For full license text, see the LICENSE file in the repo root or https://opensource.org/licenses/MIT
  */
 
-import path from 'path';
-
+import path from 'node:path';
+import { vi, describe } from 'vitest';
 import { rollup } from 'rollup';
 import lwcRollupPlugin from '@lwc/rollup-plugin';
-import { vi } from 'vitest';
 import { testFixtureDir, formatHTML } from '@lwc/test-utils-lwc-internals';
 import type * as lwc from '../index';
 
@@ -42,7 +41,7 @@ async function compileFixture({ input, dirname }: { input: string; dirname: stri
 
     const bundle = await rollup({
         input,
-        external: ['lwc'],
+        external: ['lwc', 'vitest'],
         plugins: [
             lwcRollupPlugin({
                 enableDynamicComponents: true,
diff --git a/packages/@lwc/engine-server/src/__tests__/fixtures/getter-class-list-noop/modules/x/getter-class-list-noop/getter-class-list-noop.js b/packages/@lwc/engine-server/src/__tests__/fixtures/getter-class-list-noop/modules/x/getter-class-list-noop/getter-class-list-noop.js
index 89a6358782..c790a77d78 100755
--- a/packages/@lwc/engine-server/src/__tests__/fixtures/getter-class-list-noop/modules/x/getter-class-list-noop/getter-class-list-noop.js
+++ b/packages/@lwc/engine-server/src/__tests__/fixtures/getter-class-list-noop/modules/x/getter-class-list-noop/getter-class-list-noop.js
@@ -1,3 +1,4 @@
+import { expect } from  'vitest';
 import { LightningElement } from 'lwc';
 
 export default class GetterClassListNoop extends LightningElement{
diff --git a/packages/@lwc/engine-server/src/__tests__/fixtures/getter-class-list/modules/x/getter-class-list/getter-class-list.js b/packages/@lwc/engine-server/src/__tests__/fixtures/getter-class-list/modules/x/getter-class-list/getter-class-list.js
index f2234ff23a..becc5ae5cd 100755
--- a/packages/@lwc/engine-server/src/__tests__/fixtures/getter-class-list/modules/x/getter-class-list/getter-class-list.js
+++ b/packages/@lwc/engine-server/src/__tests__/fixtures/getter-class-list/modules/x/getter-class-list/getter-class-list.js
@@ -1,3 +1,4 @@
+import { expect } from 'vitest';
 import { LightningElement } from 'lwc';
 
 export default class GetterClassList extends LightningElement{
diff --git a/packages/@lwc/engine-server/src/__tests__/fixtures/methods-noop/modules/x/methods-noop/methods-noop.js b/packages/@lwc/engine-server/src/__tests__/fixtures/methods-noop/modules/x/methods-noop/methods-noop.js
index 20a5ef65c6..c98fa7dc39 100644
--- a/packages/@lwc/engine-server/src/__tests__/fixtures/methods-noop/modules/x/methods-noop/methods-noop.js
+++ b/packages/@lwc/engine-server/src/__tests__/fixtures/methods-noop/modules/x/methods-noop/methods-noop.js
@@ -1,3 +1,4 @@
+import { expect } from 'vitest';
 import { LightningElement } from 'lwc';
 
 export default class MethodsNoop extends LightningElement {
diff --git a/packages/@lwc/engine-server/src/__tests__/fixtures/methods-unsupported/modules/x/methods-unsupported/methods-unsupported.js b/packages/@lwc/engine-server/src/__tests__/fixtures/methods-unsupported/modules/x/methods-unsupported/methods-unsupported.js
index 13d1a141f0..a03a9af6e0 100755
--- a/packages/@lwc/engine-server/src/__tests__/fixtures/methods-unsupported/modules/x/methods-unsupported/methods-unsupported.js
+++ b/packages/@lwc/engine-server/src/__tests__/fixtures/methods-unsupported/modules/x/methods-unsupported/methods-unsupported.js
@@ -1,3 +1,4 @@
+import { expect } from 'vitest';
 import { LightningElement } from 'lwc';
 
 export default class MethodsUnsupported extends LightningElement {
diff --git a/packages/@lwc/engine-server/src/__tests__/html-serialization.spec.ts b/packages/@lwc/engine-server/src/__tests__/html-serialization.spec.ts
index 6da2e50c87..e9290ebc1c 100644
--- a/packages/@lwc/engine-server/src/__tests__/html-serialization.spec.ts
+++ b/packages/@lwc/engine-server/src/__tests__/html-serialization.spec.ts
@@ -5,14 +5,14 @@
  * For full license text, see the LICENSE file in the repo root or https://opensource.org/licenses/MIT
  */
 
-import path from 'path';
-import vm from 'vm';
+import path from 'node:path';
+import vm from 'node:vm';
+import { vi, describe, it, expect } from 'vitest';
 import { parseFragment, serialize } from 'parse5';
 import { rollup, RollupLog } from 'rollup';
 import replace from '@rollup/plugin-replace';
 import virtual from '@rollup/plugin-virtual';
 import lwcRollupPlugin from '@lwc/rollup-plugin';
-import { vi } from 'vitest';
 import * as engineServer from '../index';
 
 /**
diff --git a/packages/@lwc/engine-server/src/__tests__/render-component.spec.ts b/packages/@lwc/engine-server/src/__tests__/render-component.spec.ts
index 9f004de179..41c9cc7de4 100644
--- a/packages/@lwc/engine-server/src/__tests__/render-component.spec.ts
+++ b/packages/@lwc/engine-server/src/__tests__/render-component.spec.ts
@@ -4,6 +4,7 @@
  * SPDX-License-Identifier: MIT
  * For full license text, see the LICENSE file in the repo root or https://opensource.org/licenses/MIT
  */
+import { describe, it, expect } from 'vitest';
 import { renderComponent, LightningElement } from '../index';
 
 class Test extends LightningElement {}
diff --git a/packages/@lwc/engine-server/src/__tests__/unsupported-apis.spec.ts b/packages/@lwc/engine-server/src/__tests__/unsupported-apis.spec.ts
index 56eb7d9c5d..c725068c22 100644
--- a/packages/@lwc/engine-server/src/__tests__/unsupported-apis.spec.ts
+++ b/packages/@lwc/engine-server/src/__tests__/unsupported-apis.spec.ts
@@ -4,6 +4,7 @@
  * SPDX-License-Identifier: MIT
  * For full license text, see the LICENSE file in the repo root or https://opensource.org/licenses/MIT
  */
+import { it, expect } from 'vitest';
 import { swapComponent, swapStyle, swapTemplate } from '../index';
 
 it('throws error for swapComponent', () => {
diff --git a/packages/@lwc/engine-server/src/__tests__/validate-style-text-contents.spec.ts b/packages/@lwc/engine-server/src/__tests__/validate-style-text-contents.spec.ts
index 9b38607a0c..b7ca601cb7 100644
--- a/packages/@lwc/engine-server/src/__tests__/validate-style-text-contents.spec.ts
+++ b/packages/@lwc/engine-server/src/__tests__/validate-style-text-contents.spec.ts
@@ -4,6 +4,7 @@
  * SPDX-License-Identifier: MIT
  * For full license text, see the LICENSE file in the repo root or https://opensource.org/licenses/MIT
  */
+import { describe, it, expect } from 'vitest';
 import { validateStyleTextContents } from '../utils/validate-style-text-contents';
 
 // See https://html.spec.whatwg.org/multipage/syntax.html#cdata-rcdata-restrictions
diff --git a/packages/@lwc/errors/src/__tests__/errors.spec.ts b/packages/@lwc/errors/src/__tests__/errors.spec.ts
index ee0079a0e2..b8f64e5c69 100644
--- a/packages/@lwc/errors/src/__tests__/errors.spec.ts
+++ b/packages/@lwc/errors/src/__tests__/errors.spec.ts
@@ -4,9 +4,10 @@
  * SPDX-License-Identifier: MIT
  * For full license text, see the LICENSE file in the repo root or https://opensource.org/licenses/MIT
  */
-import 'vitest';
-import path from 'path';
-import fs from 'fs';
+import path from 'node:path';
+import fs from 'node:fs';
+import { describe, it, expect } from 'vitest';
+
 import { hasOwnProperty } from '@lwc/shared';
 import * as CompilerErrors from '../compiler/error-info';
 import { LWCErrorInfo } from '../shared/types';
diff --git a/packages/@lwc/errors/src/compiler/__tests__/compiler-errors.spec.ts b/packages/@lwc/errors/src/compiler/__tests__/compiler-errors.spec.ts
index 4fd038903e..5e0c71b8d7 100644
--- a/packages/@lwc/errors/src/compiler/__tests__/compiler-errors.spec.ts
+++ b/packages/@lwc/errors/src/compiler/__tests__/compiler-errors.spec.ts
@@ -4,6 +4,8 @@
  * SPDX-License-Identifier: MIT
  * For full license text, see the LICENSE file in the repo root or https://opensource.org/licenses/MIT
  */
+import { describe, it, expect } from 'vitest';
+
 import {
     CompilerError,
     generateCompilerError,
diff --git a/packages/@lwc/errors/src/compiler/__tests__/error-info.spec.ts b/packages/@lwc/errors/src/compiler/__tests__/error-info.spec.ts
index 36f2abfd8e..d067d9cbd6 100644
--- a/packages/@lwc/errors/src/compiler/__tests__/error-info.spec.ts
+++ b/packages/@lwc/errors/src/compiler/__tests__/error-info.spec.ts
@@ -4,6 +4,7 @@
  * SPDX-License-Identifier: MIT
  * For full license text, see the LICENSE file in the repo root or https://opensource.org/licenses/MIT
  */
+import { describe, expect, it } from 'vitest';
 import * as errorInfo from '../error-info';
 // All exported objects are maps of label/error info, except for GENERIC_COMPILER_ERROR,
 // which is a top-level error info object
diff --git a/packages/@lwc/features/src/__tests__/features.spec.ts b/packages/@lwc/features/src/__tests__/features.spec.ts
index b9c0451ab9..6ec07b0f30 100644
--- a/packages/@lwc/features/src/__tests__/features.spec.ts
+++ b/packages/@lwc/features/src/__tests__/features.spec.ts
@@ -5,6 +5,7 @@
  * For full license text, see the LICENSE file in the repo root or https://opensource.org/licenses/MIT
  */
 
+import { describe, it, expect } from 'vitest';
 import features from '../index';
 
 describe('features', () => {
diff --git a/packages/@lwc/features/src/__tests__/lwcRuntimeFlags.spec.ts b/packages/@lwc/features/src/__tests__/lwcRuntimeFlags.spec.ts
index e281a415cb..87d740cdf3 100644
--- a/packages/@lwc/features/src/__tests__/lwcRuntimeFlags.spec.ts
+++ b/packages/@lwc/features/src/__tests__/lwcRuntimeFlags.spec.ts
@@ -5,6 +5,7 @@
  * For full license text, see the LICENSE file in the repo root or https://opensource.org/licenses/MIT
  */
 
+import { describe, it, expect } from 'vitest';
 import { lwcRuntimeFlags } from '../index';
 
 describe('lwcRuntimeFlags', () => {
diff --git a/packages/@lwc/features/src/__tests__/setFeatureFlag.spec.ts b/packages/@lwc/features/src/__tests__/setFeatureFlag.spec.ts
index 23c4d11555..8dc87c743f 100644
--- a/packages/@lwc/features/src/__tests__/setFeatureFlag.spec.ts
+++ b/packages/@lwc/features/src/__tests__/setFeatureFlag.spec.ts
@@ -5,7 +5,7 @@
  * For full license text, see the LICENSE file in the repo root or https://opensource.org/licenses/MIT
  */
 
-import { MockInstance, vi } from 'vitest';
+import { vi, describe, afterEach, beforeEach, expect, it, type MockInstance } from 'vitest';
 import { lwcRuntimeFlags, setFeatureFlag } from '../index';
 
 describe('setFeatureFlag', () => {
diff --git a/packages/@lwc/module-resolver/scripts/test/setup-test.ts b/packages/@lwc/module-resolver/scripts/test/setup-test.ts
index 1a3978880a..3fe606d76e 100644
--- a/packages/@lwc/module-resolver/scripts/test/setup-test.ts
+++ b/packages/@lwc/module-resolver/scripts/test/setup-test.ts
@@ -5,6 +5,7 @@
  * For full license text, see the LICENSE file in the repo root or https://opensource.org/licenses/MIT
  */
 
+import { expect } from 'vitest';
 import { toThrowErrorWithType } from './matchers/to-throw-error-with-type';
 import { toThrowErrorWithCode } from './matchers/to-throw-error-with-code';
 
diff --git a/packages/@lwc/module-resolver/src/__tests__/mapping.spec.ts b/packages/@lwc/module-resolver/src/__tests__/mapping.spec.ts
index 106692d698..9326c41ab1 100644
--- a/packages/@lwc/module-resolver/src/__tests__/mapping.spec.ts
+++ b/packages/@lwc/module-resolver/src/__tests__/mapping.spec.ts
@@ -5,6 +5,7 @@
  * For full license text, see the LICENSE file in the repo root or https://opensource.org/licenses/MIT
  */
 
+import { describe, test, expect } from 'vitest';
 import '../../scripts/test/types';
 import { resolveModule } from '../index';
 import { RegistryType } from '../types';
diff --git a/packages/@lwc/module-resolver/src/__tests__/module-errors.spec.ts b/packages/@lwc/module-resolver/src/__tests__/module-errors.spec.ts
index a12ac2256f..3592ade3e1 100644
--- a/packages/@lwc/module-resolver/src/__tests__/module-errors.spec.ts
+++ b/packages/@lwc/module-resolver/src/__tests__/module-errors.spec.ts
@@ -4,6 +4,7 @@
  * SPDX-License-Identifier: MIT
  * For full license text, see the LICENSE file in the repo root or https://opensource.org/licenses/MIT
  */
+import { describe, test, expect } from 'vitest';
 import '../../scripts/test/types';
 import { resolveModule } from '../index';
 import { fixture, NO_LWC_MODULE_FOUND_CODE, LWC_CONFIG_ERROR_CODE } from './test-utils';
diff --git a/packages/@lwc/module-resolver/src/__tests__/multi-version.spec.ts b/packages/@lwc/module-resolver/src/__tests__/multi-version.spec.ts
index a1ffbe2bc3..e5670d72fb 100644
--- a/packages/@lwc/module-resolver/src/__tests__/multi-version.spec.ts
+++ b/packages/@lwc/module-resolver/src/__tests__/multi-version.spec.ts
@@ -4,6 +4,7 @@
  * SPDX-License-Identifier: MIT
  * For full license text, see the LICENSE file in the repo root or https://opensource.org/licenses/MIT
  */
+import { describe, test, expect } from 'vitest';
 import '../../scripts/test/types';
 import { resolveModule } from '../index';
 import { RegistryType } from '../types';
diff --git a/packages/@lwc/module-resolver/src/__tests__/resolve.modules.spec.ts b/packages/@lwc/module-resolver/src/__tests__/resolve.modules.spec.ts
index 79e80c4261..46838ca589 100644
--- a/packages/@lwc/module-resolver/src/__tests__/resolve.modules.spec.ts
+++ b/packages/@lwc/module-resolver/src/__tests__/resolve.modules.spec.ts
@@ -4,6 +4,7 @@
  * SPDX-License-Identifier: MIT
  * For full license text, see the LICENSE file in the repo root or https://opensource.org/licenses/MIT
  */
+import { describe, test, expect } from 'vitest';
 import '../../scripts/test/types';
 import { resolveModule } from '../index';
 import { RegistryType } from '../types';
diff --git a/packages/@lwc/rollup-plugin/src/__tests__/apiVersion/apiVersion.spec.ts b/packages/@lwc/rollup-plugin/src/__tests__/apiVersion/apiVersion.spec.ts
index 82b2c95f1d..cdde2327d7 100644
--- a/packages/@lwc/rollup-plugin/src/__tests__/apiVersion/apiVersion.spec.ts
+++ b/packages/@lwc/rollup-plugin/src/__tests__/apiVersion/apiVersion.spec.ts
@@ -5,6 +5,8 @@
  * For full license text, see the LICENSE file in the repo root or https://opensource.org/licenses/MIT
  */
 import path from 'node:path';
+import { describe, it, expect } from 'vitest';
+
 import { rollup, RollupLog } from 'rollup';
 import { APIVersion, HIGHEST_API_VERSION, LOWEST_API_VERSION } from '@lwc/shared';
 
diff --git a/packages/@lwc/rollup-plugin/src/__tests__/compilerConfig/compilerConfig.spec.ts b/packages/@lwc/rollup-plugin/src/__tests__/compilerConfig/compilerConfig.spec.ts
index 0e673bb741..a3682da90e 100644
--- a/packages/@lwc/rollup-plugin/src/__tests__/compilerConfig/compilerConfig.spec.ts
+++ b/packages/@lwc/rollup-plugin/src/__tests__/compilerConfig/compilerConfig.spec.ts
@@ -4,7 +4,8 @@
  * SPDX-License-Identifier: MIT
  * For full license text, see the LICENSE file in the repo root or https://opensource.org/licenses/MIT
  */
-import path from 'path';
+import path from 'node:path';
+import { describe, it, expect } from 'vitest';
 import { rollup, type RollupLog, type RollupBuild } from 'rollup';
 
 import lwc, { type RollupLwcOptions } from '../../index';
diff --git a/packages/@lwc/rollup-plugin/src/__tests__/enableStaticContentOptimization/enableStaticContentOptimization.spec.ts b/packages/@lwc/rollup-plugin/src/__tests__/enableStaticContentOptimization/enableStaticContentOptimization.spec.ts
index ee8d0e83de..64e3821f38 100644
--- a/packages/@lwc/rollup-plugin/src/__tests__/enableStaticContentOptimization/enableStaticContentOptimization.spec.ts
+++ b/packages/@lwc/rollup-plugin/src/__tests__/enableStaticContentOptimization/enableStaticContentOptimization.spec.ts
@@ -5,6 +5,8 @@
  * For full license text, see the LICENSE file in the repo root or https://opensource.org/licenses/MIT
  */
 import path from 'node:path';
+import { describe, it, expect } from 'vitest';
+
 import { rollup, RollupLog } from 'rollup';
 import lwc, { RollupLwcOptions } from '../../index';
 
diff --git a/packages/@lwc/rollup-plugin/src/__tests__/integrations/integrations.spec.ts b/packages/@lwc/rollup-plugin/src/__tests__/integrations/integrations.spec.ts
index 24fb450073..74498add7d 100644
--- a/packages/@lwc/rollup-plugin/src/__tests__/integrations/integrations.spec.ts
+++ b/packages/@lwc/rollup-plugin/src/__tests__/integrations/integrations.spec.ts
@@ -4,7 +4,8 @@
  * SPDX-License-Identifier: MIT
  * For full license text, see the LICENSE file in the repo root or https://opensource.org/licenses/MIT
  */
-import path from 'path';
+import path from 'node:path';
+import { describe, it, expect } from 'vitest';
 import { rollup } from 'rollup';
 
 import lwc from '../../index';
diff --git a/packages/@lwc/rollup-plugin/src/__tests__/resolver/resolver.spec.ts b/packages/@lwc/rollup-plugin/src/__tests__/resolver/resolver.spec.ts
index c1ab46a231..99ac067508 100644
--- a/packages/@lwc/rollup-plugin/src/__tests__/resolver/resolver.spec.ts
+++ b/packages/@lwc/rollup-plugin/src/__tests__/resolver/resolver.spec.ts
@@ -4,8 +4,9 @@
  * SPDX-License-Identifier: MIT
  * For full license text, see the LICENSE file in the repo root or https://opensource.org/licenses/MIT
  */
-import path from 'path';
-import fs from 'fs';
+import path from 'node:path';
+import fs from 'node:fs';
+import { describe, it, expect } from 'vitest';
 import { rollup, type RollupLog, type Plugin, type RollupBuild } from 'rollup';
 import nodeResolve from '@rollup/plugin-node-resolve';
 
diff --git a/packages/@lwc/rollup-plugin/src/__tests__/rootDir/rootDir.spec.ts b/packages/@lwc/rollup-plugin/src/__tests__/rootDir/rootDir.spec.ts
index 59096976f0..55acc3142e 100644
--- a/packages/@lwc/rollup-plugin/src/__tests__/rootDir/rootDir.spec.ts
+++ b/packages/@lwc/rollup-plugin/src/__tests__/rootDir/rootDir.spec.ts
@@ -4,9 +4,10 @@
  * SPDX-License-Identifier: MIT
  * For full license text, see the LICENSE file in the repo root or https://opensource.org/licenses/MIT
  */
-import path from 'path';
-import { rollup } from 'rollup';
+import path from 'node:path';
+import { describe, it, expect } from 'vitest';
 
+import { rollup, type RollupLog } from 'rollup';
 import lwc from '../../index';
 
 describe('rootDir', () => {
@@ -35,7 +36,7 @@ describe('rootDir', () => {
     });
 
     it('warns if an "input" object is passed and when "rootDir" is not set', async () => {
-        const warnings: any = [];
+        const warnings: RollupLog[] = [];
 
         await rollup({
             input: {
diff --git a/packages/@lwc/rollup-plugin/src/__tests__/warnings/warnings.spec.ts b/packages/@lwc/rollup-plugin/src/__tests__/warnings/warnings.spec.ts
index 54822e0ce2..921d2956e6 100644
--- a/packages/@lwc/rollup-plugin/src/__tests__/warnings/warnings.spec.ts
+++ b/packages/@lwc/rollup-plugin/src/__tests__/warnings/warnings.spec.ts
@@ -4,7 +4,9 @@
  * SPDX-License-Identifier: MIT
  * For full license text, see the LICENSE file in the repo root or https://opensource.org/licenses/MIT
  */
-import path from 'path';
+import path from 'node:path';
+import { describe, it, expect } from 'vitest';
+
 import { rollup, RollupLog } from 'rollup';
 import { APIVersion } from '@lwc/shared';
 import lwc from '../../index';
diff --git a/packages/@lwc/shared/src/__tests__/assert.spec.ts b/packages/@lwc/shared/src/__tests__/assert.spec.ts
index 91182b65e2..281bbb190e 100644
--- a/packages/@lwc/shared/src/__tests__/assert.spec.ts
+++ b/packages/@lwc/shared/src/__tests__/assert.spec.ts
@@ -4,6 +4,7 @@
  * SPDX-License-Identifier: MIT
  * For full license text, see the LICENSE file in the repo root or https://opensource.org/licenses/MIT
  */
+import { describe, it, expect } from 'vitest';
 import { assert } from '../index';
 
 describe('assert', () => {
diff --git a/packages/@lwc/shared/src/__tests__/html-attributes.spec.ts b/packages/@lwc/shared/src/__tests__/html-attributes.spec.ts
index 3a275e729b..669b38ec70 100644
--- a/packages/@lwc/shared/src/__tests__/html-attributes.spec.ts
+++ b/packages/@lwc/shared/src/__tests__/html-attributes.spec.ts
@@ -4,6 +4,7 @@
  * SPDX-License-Identifier: MIT
  * For full license text, see the LICENSE file in the repo root or https://opensource.org/licenses/MIT
  */
+import { describe, test, expect } from 'vitest';
 import { htmlPropertyToAttribute, kebabCaseToCamelCase } from '../html-attributes';
 
 type StringPair = [prop: string, attr: string];
diff --git a/packages/@lwc/shared/src/__tests__/signals.spec.ts b/packages/@lwc/shared/src/__tests__/signals.spec.ts
index 3e2b5ebf74..b958052a79 100644
--- a/packages/@lwc/shared/src/__tests__/signals.spec.ts
+++ b/packages/@lwc/shared/src/__tests__/signals.spec.ts
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: MIT
  * For full license text, see the LICENSE file in the repo root or https://opensource.org/licenses/MIT
  */
-import { vi } from 'vitest';
+import { describe, beforeEach, expect, it, vi } from 'vitest';
 
 describe('signals', () => {
     let setTrustedSignalSet: (signals: WeakSet<object>) => void;
diff --git a/packages/@lwc/signals/src/__tests__/index.spec.ts b/packages/@lwc/signals/src/__tests__/index.spec.ts
index d528874883..9f4b42dc7d 100644
--- a/packages/@lwc/signals/src/__tests__/index.spec.ts
+++ b/packages/@lwc/signals/src/__tests__/index.spec.ts
@@ -5,7 +5,7 @@
  * For full license text, see the LICENSE file in the repo root or https://opensource.org/licenses/MIT
  */
 
-import { vi } from 'vitest';
+import { vi, describe, it, expect } from 'vitest';
 import { Signal } from './signal';
 
 describe('signal protocol', () => {
diff --git a/packages/@lwc/ssr-compiler/src/__tests__/compilation.spec.ts b/packages/@lwc/ssr-compiler/src/__tests__/compilation.spec.ts
index 134331a13f..95e75a688b 100644
--- a/packages/@lwc/ssr-compiler/src/__tests__/compilation.spec.ts
+++ b/packages/@lwc/ssr-compiler/src/__tests__/compilation.spec.ts
@@ -1,4 +1,5 @@
 import path from 'node:path';
+import { describe, test, expect } from 'vitest';
 import { compileComponentForSSR } from '../index';
 
 describe('component compilation', () => {
diff --git a/packages/@lwc/ssr-compiler/src/__tests__/estemplate.spec.ts b/packages/@lwc/ssr-compiler/src/__tests__/estemplate.spec.ts
index 1157b6892a..6b1f65b8c8 100644
--- a/packages/@lwc/ssr-compiler/src/__tests__/estemplate.spec.ts
+++ b/packages/@lwc/ssr-compiler/src/__tests__/estemplate.spec.ts
@@ -6,6 +6,7 @@
  */
 
 import { is, builders as b } from 'estree-toolkit';
+import { describe, test, expect } from 'vitest';
 import { esTemplate, esTemplateWithYield } from '../estemplate';
 
 describe.each(
@@ -54,7 +55,7 @@ describe.each(
             const tmpl = topLevelFn`
                     const ${is.identifier} = 'foo';
                 `;
-            const doReplacement = () => tmpl(b.literal('I am not an identifier'));
+            const doReplacement = () => tmpl(b.literal('I am not an identifier') as any);
             expect(doReplacement).toThrow(
                 'Validation failed for templated node of type Identifier'
             );
diff --git a/packages/@lwc/ssr-compiler/src/__tests__/fixtures.spec.ts b/packages/@lwc/ssr-compiler/src/__tests__/fixtures.spec.ts
index 7a97b684dc..208572684a 100644
--- a/packages/@lwc/ssr-compiler/src/__tests__/fixtures.spec.ts
+++ b/packages/@lwc/ssr-compiler/src/__tests__/fixtures.spec.ts
@@ -6,7 +6,7 @@
  */
 
 import path from 'node:path';
-import { vi } from 'vitest';
+import { vi, describe } from 'vitest';
 import { rollup, RollupLog } from 'rollup';
 import lwcRollupPlugin from '@lwc/rollup-plugin';
 import { FeatureFlagName } from '@lwc/features/dist/types';
diff --git a/packages/@lwc/ssr-compiler/src/__tests__/transmogrify.spec.ts b/packages/@lwc/ssr-compiler/src/__tests__/transmogrify.spec.ts
index c83c37a672..3018ec9cd0 100644
--- a/packages/@lwc/ssr-compiler/src/__tests__/transmogrify.spec.ts
+++ b/packages/@lwc/ssr-compiler/src/__tests__/transmogrify.spec.ts
@@ -1,6 +1,6 @@
 import { parseModule } from 'meriyah';
 import { generate } from 'astring';
-import { beforeAll } from 'vitest';
+import { describe, beforeAll, test, expect } from 'vitest';
 import { transmogrify } from '../transmogrify';
 import type { Program as EsProgram } from 'estree';
 
diff --git a/packages/@lwc/ssr-runtime/src/__tests__/render-component.spec.ts b/packages/@lwc/ssr-runtime/src/__tests__/render-component.spec.ts
index e00b6d8218..4104c4f75d 100644
--- a/packages/@lwc/ssr-runtime/src/__tests__/render-component.spec.ts
+++ b/packages/@lwc/ssr-runtime/src/__tests__/render-component.spec.ts
@@ -1,5 +1,6 @@
 import path from 'node:path';
 import fs from 'node:fs/promises';
+import { describe, beforeAll, test, expect } from 'vitest';
 import { rollup } from 'rollup';
 import lwcRollupPlugin from '@lwc/rollup-plugin';
 import { renderComponent } from '../index';
diff --git a/packages/@lwc/ssr-runtime/src/__tests__/server-side-render-component-alias.spec.ts b/packages/@lwc/ssr-runtime/src/__tests__/server-side-render-component-alias.spec.ts
index 7e5ffcd20d..d12b22d1c4 100644
--- a/packages/@lwc/ssr-runtime/src/__tests__/server-side-render-component-alias.spec.ts
+++ b/packages/@lwc/ssr-runtime/src/__tests__/server-side-render-component-alias.spec.ts
@@ -1,3 +1,4 @@
+import { describe, it, expect } from 'vitest';
 import { renderComponent, serverSideRenderComponent } from '../index';
 
 describe('renderComponent as alias of serverSideRenderComponent', () => {
diff --git a/packages/@lwc/ssr-runtime/src/__tests__/to-iterator-directive.spec.ts b/packages/@lwc/ssr-runtime/src/__tests__/to-iterator-directive.spec.ts
index cf99841fe1..996c8254c0 100644
--- a/packages/@lwc/ssr-runtime/src/__tests__/to-iterator-directive.spec.ts
+++ b/packages/@lwc/ssr-runtime/src/__tests__/to-iterator-directive.spec.ts
@@ -1,3 +1,4 @@
+import { describe, it, expect } from 'vitest';
 import { toIteratorDirective } from '../to-iterator-directive';
 
 describe('toIteratorDirective', () => {
diff --git a/packages/@lwc/ssr-runtime/src/__tests__/validate-style-text-contents.spec.ts b/packages/@lwc/ssr-runtime/src/__tests__/validate-style-text-contents.spec.ts
index f18bdc9fba..ca65d2d99a 100644
--- a/packages/@lwc/ssr-runtime/src/__tests__/validate-style-text-contents.spec.ts
+++ b/packages/@lwc/ssr-runtime/src/__tests__/validate-style-text-contents.spec.ts
@@ -4,6 +4,7 @@
  * SPDX-License-Identifier: MIT
  * For full license text, see the LICENSE file in the repo root or https://opensource.org/licenses/MIT
  */
+import { describe, it, expect } from 'vitest';
 import { validateStyleTextContents } from '../validate-style-text-contents';
 
 // See https://html.spec.whatwg.org/multipage/syntax.html#cdata-rcdata-restrictions
diff --git a/packages/@lwc/style-compiler/src/__tests__/index.spec.ts b/packages/@lwc/style-compiler/src/__tests__/index.spec.ts
index bb795c4620..b352b4558d 100644
--- a/packages/@lwc/style-compiler/src/__tests__/index.spec.ts
+++ b/packages/@lwc/style-compiler/src/__tests__/index.spec.ts
@@ -4,7 +4,8 @@
  * SPDX-License-Identifier: MIT
  * For full license text, see the LICENSE file in the repo root or https://opensource.org/licenses/MIT
  */
-import path from 'path';
+import path from 'node:path';
+import { describe } from 'vitest';
 import { testFixtureDir } from '@lwc/test-utils-lwc-internals';
 import { LWC_VERSION } from '@lwc/shared';
 
diff --git a/packages/@lwc/style-compiler/src/__tests__/inline.spec.ts b/packages/@lwc/style-compiler/src/__tests__/inline.spec.ts
index 6a93e0caf0..319bad3a23 100644
--- a/packages/@lwc/style-compiler/src/__tests__/inline.spec.ts
+++ b/packages/@lwc/style-compiler/src/__tests__/inline.spec.ts
@@ -4,6 +4,7 @@
  * SPDX-License-Identifier: MIT
  * For full license text, see the LICENSE file in the repo root or https://opensource.org/licenses/MIT
  */
+import { describe, it, expect } from 'vitest';
 import { transform } from '../index';
 
 describe('playground test for debugging', () => {
diff --git a/packages/@lwc/template-compiler/src/__tests__/config.spec.ts b/packages/@lwc/template-compiler/src/__tests__/config.spec.ts
index cd41fe0f5f..2ae907a918 100644
--- a/packages/@lwc/template-compiler/src/__tests__/config.spec.ts
+++ b/packages/@lwc/template-compiler/src/__tests__/config.spec.ts
@@ -4,6 +4,7 @@
  * SPDX-License-Identifier: MIT
  * For full license text, see the LICENSE file in the repo root or https://opensource.org/licenses/MIT
  */
+import { describe, it, expect } from 'vitest';
 import { HIGHEST_API_VERSION } from '@lwc/shared';
 import { normalizeConfig } from '../config';
 
diff --git a/packages/@lwc/template-compiler/src/__tests__/error-codes.spec.ts b/packages/@lwc/template-compiler/src/__tests__/error-codes.spec.ts
index e6d9c26e01..4411ac2165 100644
--- a/packages/@lwc/template-compiler/src/__tests__/error-codes.spec.ts
+++ b/packages/@lwc/template-compiler/src/__tests__/error-codes.spec.ts
@@ -4,6 +4,7 @@
  * SPDX-License-Identifier: MIT
  * For full license text, see the LICENSE file in the repo root or https://opensource.org/licenses/MIT
  */
+import { describe, it, expect } from 'vitest';
 import { ErrorCodes } from 'parse5';
 import { errorCodesToErrorOn, errorCodesToWarnOnInOlderAPIVersions } from '../parser/parse5Errors';
 
diff --git a/packages/@lwc/template-compiler/src/__tests__/fixtures.spec.ts b/packages/@lwc/template-compiler/src/__tests__/fixtures.spec.ts
index a674d55509..168ba72f2e 100644
--- a/packages/@lwc/template-compiler/src/__tests__/fixtures.spec.ts
+++ b/packages/@lwc/template-compiler/src/__tests__/fixtures.spec.ts
@@ -4,7 +4,8 @@
  * SPDX-License-Identifier: MIT
  * For full license text, see the LICENSE file in the repo root or https://opensource.org/licenses/MIT
  */
-import path from 'path';
+import path from 'node:path';
+import { describe } from 'vitest';
 import { LWC_VERSION } from '@lwc/shared';
 import prettier from 'prettier';
 import { testFixtureDir } from '@lwc/test-utils-lwc-internals';
diff --git a/packages/@lwc/template-compiler/src/__tests__/index.spec.ts b/packages/@lwc/template-compiler/src/__tests__/index.spec.ts
index 42eb29eb68..8ea3df7fd8 100644
--- a/packages/@lwc/template-compiler/src/__tests__/index.spec.ts
+++ b/packages/@lwc/template-compiler/src/__tests__/index.spec.ts
@@ -4,6 +4,7 @@
  * SPDX-License-Identifier: MIT
  * For full license text, see the LICENSE file in the repo root or https://opensource.org/licenses/MIT
  */
+import { describe, it, expect } from 'vitest';
 import { DiagnosticLevel } from '@lwc/errors';
 import compile, { Config, parse } from '../index';
 
diff --git a/packages/@lwc/wire-service/src/__tests__/index.spec.ts b/packages/@lwc/wire-service/src/__tests__/index.spec.ts
index 4735221074..f6ca3a0888 100644
--- a/packages/@lwc/wire-service/src/__tests__/index.spec.ts
+++ b/packages/@lwc/wire-service/src/__tests__/index.spec.ts
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: MIT
  * For full license text, see the LICENSE file in the repo root or https://opensource.org/licenses/MIT
  */
-import { vi } from 'vitest';
+import { vi, describe, it, expect } from 'vitest';
 import { register, WireEventTarget, ValueChangedEvent } from '../index';
 
 describe('WireEventTarget from register', () => {
diff --git a/packages/lwc/__tests__/default-exports.spec.ts b/packages/lwc/__tests__/default-exports.spec.ts
index 43c07c8043..42bd14a8e8 100644
--- a/packages/lwc/__tests__/default-exports.spec.ts
+++ b/packages/lwc/__tests__/default-exports.spec.ts
@@ -6,6 +6,7 @@
  */
 import * as fs from 'node:fs';
 import * as path from 'node:path';
+import { describe, beforeAll, test, expect } from 'vitest';
 
 const PACKAGE_ROOT = path.join(__dirname, '..');
 
diff --git a/packages/lwc/__tests__/isomorphic-exports.spec.ts b/packages/lwc/__tests__/isomorphic-exports.spec.ts
index b388397cc7..18fcb5e791 100644
--- a/packages/lwc/__tests__/isomorphic-exports.spec.ts
+++ b/packages/lwc/__tests__/isomorphic-exports.spec.ts
@@ -4,6 +4,7 @@
  * SPDX-License-Identifier: MIT
  * For full license text, see the LICENSE file in the repo root or https://opensource.org/licenses/MIT
  */
+import { describe, test, expect } from 'vitest';
 import * as engineDom from '@lwc/engine-dom';
 import * as engineServer from '@lwc/engine-server';
 import * as ssrRuntime from '@lwc/ssr-runtime';
diff --git a/packages/lwc/__tests__/package-exports.spec.ts b/packages/lwc/__tests__/package-exports.spec.ts
index c8f9fcc4fc..21656d01d0 100644
--- a/packages/lwc/__tests__/package-exports.spec.ts
+++ b/packages/lwc/__tests__/package-exports.spec.ts
@@ -6,6 +6,7 @@
  */
 import { readFileSync } from 'node:fs';
 import { join } from 'node:path';
+import { describe, test, expect } from 'vitest';
 
 /** Packages that only contain type definitions, no JavaScript. */
 const tsPackages = ['@lwc/types'];
diff --git a/scripts/test-utils/test-fixture-dir.ts b/scripts/test-utils/test-fixture-dir.ts
index ecfc9f6fe6..0ac9116ab8 100644
--- a/scripts/test-utils/test-fixture-dir.ts
+++ b/scripts/test-utils/test-fixture-dir.ts
@@ -7,6 +7,7 @@
 
 import fs from 'node:fs';
 import path from 'node:path';
+import { test } from 'vitest';
 import * as glob from 'glob';
 import type { Config as StyleCompilerConfig } from '@lwc/style-compiler';
 const { globSync } = glob;
diff --git a/tsconfig.json b/tsconfig.json
index 6937306031..06449dfb2b 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -13,7 +13,7 @@
         "lib": ["es2021"],
 
         // Disable automatic inclusion of @types packages
-        "types": ["node", "vitest/globals"],
+        "types": ["node"],
 
         // @rollup/plugin-typescript is actually responsible for writing dist files. Using "." as the declarationDir
         // ensures that .d.ts files are co-located with JS files, e.g. `dist/index.js` and `dist/index.d.ts`.
diff --git a/vitest.shared.mjs b/vitest.shared.mjs
index 6e74ae1dc2..26e7c05579 100644
--- a/vitest.shared.mjs
+++ b/vitest.shared.mjs
@@ -6,7 +6,6 @@ export default defineConfig({
     test: {
         // Don't time out if we detect a debugger attached
         testTimeout: inspector.url() ? Number.MAX_SAFE_INTEGER : undefined,
-        globals: true,
         include: ['**/*.{test,spec}.{mjs,js,ts}'],
         snapshotFormat: {
             printBasicPrototype: true,