fix: rewrite .js to .ts imports in test files

bennypowers · bennypowers · commit fef614e6446f · 2026-03-19T18:29:21.000+02:00
Test files import from source using .js extensions which don't
resolve on Node 24 with module:nodenext. Apply the same .js -&gt; .ts
import rewrite to test files as was done for source files.

Assisted-By: Claude Opus 4.6 (1M context) &lt;noreply@anthropic.com&gt;
diff --git a/packages/dev-server-esbuild/test/banner-footer.test.ts b/packages/dev-server-esbuild/test/banner-footer.test.ts
@@ -1,8 +1,8 @@
 import assert from 'node:assert/strict';
 import { describe, it } from 'node:test';
 import path from 'path';
-import { createTestServer } from '@web/dev-server-core/test-helpers';
-import { expectIncludes } from '@web/dev-server-core/test-helpers';
+import { createTestServer } from '@web/dev-server-core/test-helpers.ts';
+import { expectIncludes } from '@web/dev-server-core/test-helpers.ts';
 
 import { esbuildPlugin } from '../src/index.ts';
 
diff --git a/packages/dev-server-esbuild/test/browser-targets.test.ts b/packages/dev-server-esbuild/test/browser-targets.test.ts
@@ -1,6 +1,6 @@
 import assert from 'node:assert/strict';
 import { describe, it } from 'node:test';
-import browserCompatData from '@mdn/browser-compat-data';
+import browserCompatData from '@mdn/browser-compat-data.ts';
 const { browsers } = browserCompatData;
 import { isLatestModernBrowser, getLatestStableMajor } from '../src/browser-targets.ts';
 
diff --git a/packages/dev-server-esbuild/test/json.test.ts b/packages/dev-server-esbuild/test/json.test.ts
@@ -1,7 +1,7 @@
 import assert from 'node:assert/strict';
 import { describe, it } from 'node:test';
 import path from 'path';
-import { expectIncludes, createTestServer } from '@web/dev-server-core/test-helpers';
+import { expectIncludes, createTestServer } from '@web/dev-server-core/test-helpers.ts';
 
 import { esbuildPlugin } from '../src/index.ts';
 
diff --git a/packages/dev-server-esbuild/test/jsx.test.ts b/packages/dev-server-esbuild/test/jsx.test.ts
@@ -1,7 +1,7 @@
 import assert from 'node:assert/strict';
 import { describe, it } from 'node:test';
 import path from 'path';
-import { expectIncludes, createTestServer } from '@web/dev-server-core/test-helpers';
+import { expectIncludes, createTestServer } from '@web/dev-server-core/test-helpers.ts';
 
 import { esbuildPlugin } from '../src/index.ts';
 
diff --git a/packages/dev-server-esbuild/test/target.test.ts b/packages/dev-server-esbuild/test/target.test.ts
@@ -1,7 +1,7 @@
 import assert from 'node:assert/strict';
 import { describe, it } from 'node:test';
 import path from 'path';
-import { createTestServer, expectIncludes } from '@web/dev-server-core/test-helpers';
+import { createTestServer, expectIncludes } from '@web/dev-server-core/test-helpers.ts';
 
 import { esbuildPlugin } from '../src/index.ts';
 
diff --git a/packages/dev-server-esbuild/test/ts.test.ts b/packages/dev-server-esbuild/test/ts.test.ts
@@ -1,10 +1,10 @@
 import assert from 'node:assert/strict';
 import { describe, it } from 'node:test';
 import path from 'path';
-import { createTestServer } from '@web/dev-server-core/test-helpers';
-import { expectIncludes, expectNotIncludes } from '@web/dev-server-core/test-helpers';
+import { createTestServer } from '@web/dev-server-core/test-helpers.ts';
+import { expectIncludes, expectNotIncludes } from '@web/dev-server-core/test-helpers.ts';
 import type { Plugin as RollupPlugin } from 'rollup';
-import { fromRollup } from '@web/dev-server-rollup';
+import { fromRollup } from '@web/dev-server-rollup.ts';
 
 import { esbuildPlugin } from '../src/index.ts';
 
diff --git a/packages/dev-server-esbuild/test/tsx.test.ts b/packages/dev-server-esbuild/test/tsx.test.ts
@@ -1,8 +1,8 @@
 import assert from 'node:assert/strict';
 import { describe, it } from 'node:test';
 import path from 'path';
-import { createTestServer } from '@web/dev-server-core/test-helpers';
-import { expectIncludes, expectNotIncludes } from '@web/dev-server-core/test-helpers';
+import { createTestServer } from '@web/dev-server-core/test-helpers.ts';
+import { expectIncludes, expectNotIncludes } from '@web/dev-server-core/test-helpers.ts';
 
 import { esbuildPlugin } from '../src/index.ts';
 
diff --git a/packages/dev-server-hmr/test/browser.test.ts b/packages/dev-server-hmr/test/browser.test.ts
@@ -1,7 +1,7 @@
 import { describe, it, before, after } from 'node:test';
 import assert from 'node:assert/strict';
 import { stubMethod } from 'hanbi';
-import { createTestServer, expectIncludes } from '@web/dev-server-core/test-helpers';
+import { createTestServer, expectIncludes } from '@web/dev-server-core/test-helpers.ts';
 import type { Browser, HTTPResponse, Page } from 'puppeteer';
 import { launch as launchPuppeteer } from 'puppeteer';
 import { posix as pathUtil } from 'path';
diff --git a/packages/dev-server-import-maps/test/injection.test.ts b/packages/dev-server-import-maps/test/injection.test.ts
@@ -1,8 +1,8 @@
 import { it } from 'node:test';
-import { createTestServer, expectNotIncludes } from '@web/dev-server-core/test-helpers';
-import { fetchText, expectIncludes, virtualFilesPlugin } from '@web/dev-server-core/test-helpers';
+import { createTestServer, expectNotIncludes } from '@web/dev-server-core/test-helpers.ts';
+import { fetchText, expectIncludes, virtualFilesPlugin } from '@web/dev-server-core/test-helpers.ts';
 
-import { importMapsPlugin } from '../src/importMapsPlugin.js';
+import { importMapsPlugin } from '../src/importMapsPlugin.ts';
 
 it('can inject an import map into any page', async () => {
   const { server, host } = await createTestServer({
diff --git a/packages/dev-server-import-maps/test/resolving.test.ts b/packages/dev-server-import-maps/test/resolving.test.ts
@@ -1,7 +1,7 @@
 import { describe, it } from 'node:test';
 import assert from 'node:assert/strict';
-import { fetchText, expectIncludes, virtualFilesPlugin } from '@web/dev-server-core/test-helpers';
-import { createTestServer } from '@web/dev-server-core/test-helpers';
+import { fetchText, expectIncludes, virtualFilesPlugin } from '@web/dev-server-core/test-helpers.ts';
+import { createTestServer } from '@web/dev-server-core/test-helpers.ts';
 import { spy } from 'hanbi';
 import path from 'path';
 
diff --git a/packages/dev-server-legacy/test/transform-html.test.ts b/packages/dev-server-legacy/test/transform-html.test.ts
@@ -1,7 +1,7 @@
 import { describe, it } from 'node:test';
 import assert from 'node:assert/strict';
-import { createTestServer } from '@web/dev-server-core/test-helpers';
-import { fetchText, expectIncludes } from '@web/dev-server-core/test-helpers';
+import { createTestServer } from '@web/dev-server-core/test-helpers.ts';
+import { fetchText, expectIncludes } from '@web/dev-server-core/test-helpers.ts';
 
 import { legacyPlugin } from '../src/legacyPlugin.ts';
 import { modernUserAgents, legacyUserAgents } from './userAgents.ts';
diff --git a/packages/dev-server-legacy/test/transform-js.test.ts b/packages/dev-server-legacy/test/transform-js.test.ts
@@ -1,7 +1,7 @@
 import { describe, it } from 'node:test';
 import assert from 'node:assert/strict';
-import { createTestServer } from '@web/dev-server-core/test-helpers';
-import { fetchText, expectIncludes, expectNotIncludes } from '@web/dev-server-core/test-helpers';
+import { createTestServer } from '@web/dev-server-core/test-helpers.ts';
+import { fetchText, expectIncludes, expectNotIncludes } from '@web/dev-server-core/test-helpers.ts';
 
 import { legacyPlugin } from '../src/legacyPlugin.ts';
 import { modernUserAgents, legacyUserAgents } from './userAgents.ts';
diff --git a/packages/dev-server-rollup/test/node/plugins/alias.test.ts b/packages/dev-server-rollup/test/node/plugins/alias.test.ts
@@ -1,8 +1,8 @@
 import { describe, it } from 'node:test';
-import rollupAlias from '@rollup/plugin-alias';
+import rollupAlias from '@rollup/plugin-alias.ts';
 
-import { createTestServer, fetchText, expectIncludes } from '../test-helpers.js';
-import { fromRollup } from '../../../src/fromRollup.js';
+import { createTestServer, fetchText, expectIncludes } from '../test-helpers.ts';
+import { fromRollup } from '../../../src/fromRollup.ts';
 
 const alias = fromRollup(rollupAlias);
 
diff --git a/packages/dev-server-rollup/test/node/plugins/babel.test.ts b/packages/dev-server-rollup/test/node/plugins/babel.test.ts
@@ -1,7 +1,7 @@
 /// <reference types="../../../types/rollup__plugin-babel" />
 import { describe, it } from 'node:test';
 import { fileURLToPath } from 'node:url';
-import rollupBabel from '@rollup/plugin-babel';
+import rollupBabel from '@rollup/plugin-babel.ts';
 
 import { createTestServer, fetchText, expectIncludes } from '../test-helpers.ts';
 import { fromRollup } from '../../../src/index.ts';
diff --git a/packages/dev-server-rollup/test/node/plugins/commonjs.test.ts b/packages/dev-server-rollup/test/node/plugins/commonjs.test.ts
@@ -1,13 +1,13 @@
 import { describe, it } from 'node:test';
-import rollupCommonjs from '@rollup/plugin-commonjs';
-import { runTests } from '@web/test-runner-core/test-helpers';
+import rollupCommonjs from '@rollup/plugin-commonjs.ts';
+import { runTests } from '@web/test-runner-core/test-helpers.ts';
 import { resolve } from 'path';
-import { chromeLauncher } from '@web/test-runner-chrome';
+import { chromeLauncher } from '@web/test-runner-chrome.ts';
 
 import * as path from 'path';
-import { createTestServer, fetchText, expectIncludes } from '../test-helpers.js';
-import { fromRollup } from '../../../src/index.js';
-import { nodeResolvePlugin } from '@web/dev-server';
+import { createTestServer, fetchText, expectIncludes } from '../test-helpers.ts';
+import { fromRollup } from '../../../src/index.ts';
+import { nodeResolvePlugin } from '@web/dev-server.ts';
 
 const __dirname = import.meta.dirname;
 
diff --git a/packages/dev-server-rollup/test/node/plugins/replace.test.ts b/packages/dev-server-rollup/test/node/plugins/replace.test.ts
@@ -1,8 +1,8 @@
 import { describe, it } from 'node:test';
-import rollupReplace from '@rollup/plugin-replace';
+import rollupReplace from '@rollup/plugin-replace.ts';
 
-import { createTestServer, fetchText, expectIncludes } from '../test-helpers.js';
-import { fromRollup } from '../../../src/index.js';
+import { createTestServer, fetchText, expectIncludes } from '../test-helpers.ts';
+import { fromRollup } from '../../../src/index.ts';
 
 const replace = fromRollup(rollupReplace as any);
 
diff --git a/packages/dev-server-rollup/test/node/test-helpers.ts b/packages/dev-server-rollup/test/node/test-helpers.ts
@@ -5,7 +5,7 @@ import {
   fetchText,
   expectIncludes,
 } from '@web/dev-server-core/test-helpers';
-import type { DevServerCoreConfig, Logger } from '@web/dev-server-core';
+import type { DevServerCoreConfig, Logger } from '@web/dev-server-core.ts';
 
 const __dirname = import.meta.dirname;
 
diff --git a/packages/rollup-plugin-html/test/input/InputData.test.ts b/packages/rollup-plugin-html/test/input/InputData.test.ts
@@ -2,15 +2,15 @@ import assert from 'node:assert/strict';
 import { describe, it } from 'node:test';
 import path from 'path';
 <<<<<<< HEAD:packages/rollup-plugin-html/test/src/input/InputData.test.ts
-import { cleanApp, createApp, html, js } from '../../utils.js';
+import { cleanApp, createApp, html, js } from '../../utils.ts';
 ||||||| parent of c37bb778 (chore: migrate tests from mocha/chai to node:test + node:assert):packages/rollup-plugin-html/test/src/input/InputData.test.ts
 import { cleanApp, createApp, html, js } from '../../utils.ts';
 =======
 >>>>>>> c37bb778 (chore: migrate tests from mocha/chai to node:test + node:assert):packages/rollup-plugin-html/test/input/InputData.test.ts
 
 <<<<<<< HEAD:packages/rollup-plugin-html/test/src/input/InputData.test.ts
-import { getInputData } from '../../../src/input/getInputData.js';
-import { InputData } from '../../../src/input/InputData.js';
+import { getInputData } from '../../../src/input/getInputData.ts';
+import { InputData } from '../../../src/input/InputData.ts';
 ||||||| parent of c37bb778 (chore: migrate tests from mocha/chai to node:test + node:assert):packages/rollup-plugin-html/test/src/input/InputData.test.ts
 import { getInputData } from '../../../src/input/getInputData.ts';
 import { InputData } from '../../../src/input/InputData.ts';
diff --git a/packages/rollup-plugin-html/test/output/getEntrypointBundles.test.ts b/packages/rollup-plugin-html/test/output/getEntrypointBundles.test.ts
@@ -5,7 +5,7 @@ import {
   createImportPath,
 <<<<<<< HEAD:packages/rollup-plugin-html/test/src/output/getEntrypointBundles.test.ts
 } from '../../../src/output/getEntrypointBundles.js';
-import { GeneratedBundle, ScriptModuleTag } from '../../../src/RollupPluginHTMLOptions.js';
+import { GeneratedBundle, ScriptModuleTag } from '../../../src/RollupPluginHTMLOptions.ts';
 ||||||| parent of c37bb778 (chore: migrate tests from mocha/chai to node:test + node:assert):packages/rollup-plugin-html/test/src/output/getEntrypointBundles.test.ts
 } from '../../../src/output/getEntrypointBundles.ts';
 import { GeneratedBundle, ScriptModuleTag } from '../../../src/RollupPluginHTMLOptions.ts';
diff --git a/packages/rollup-plugin-html/test/output/getOutputHTML.test.ts b/packages/rollup-plugin-html/test/output/getOutputHTML.test.ts
@@ -2,9 +2,9 @@ import assert from 'node:assert/strict';
 import { describe, it } from 'node:test';
 import path from 'path';
 <<<<<<< HEAD:packages/rollup-plugin-html/test/src/output/getOutputHTML.test.ts
-import { getOutputHTML, GetOutputHTMLParams } from '../../../src/output/getOutputHTML.js';
-import { EntrypointBundle } from '../../../src/RollupPluginHTMLOptions.js';
-import { html } from '../../utils.js';
+import { getOutputHTML, GetOutputHTMLParams } from '../../../src/output/getOutputHTML.ts';
+import { EntrypointBundle } from '../../../src/RollupPluginHTMLOptions.ts';
+import { html } from '../../utils.ts';
 ||||||| parent of c37bb778 (chore: migrate tests from mocha/chai to node:test + node:assert):packages/rollup-plugin-html/test/src/output/getOutputHTML.test.ts
 import { getOutputHTML, GetOutputHTMLParams } from '../../../src/output/getOutputHTML.ts';
 import { EntrypointBundle } from '../../../src/RollupPluginHTMLOptions.ts';
diff --git a/packages/rollup-plugin-html/test/output/injectBundles.test.ts b/packages/rollup-plugin-html/test/output/injectBundles.test.ts
@@ -1,16 +1,16 @@
-import { getTextContent } from '@web/parse5-utils';
+import { getTextContent } from '@web/parse5-utils.ts';
 import assert from 'node:assert/strict';
 import { describe, it } from 'node:test';
 import { parse, serialize } from 'parse5';
 <<<<<<< HEAD:packages/rollup-plugin-html/test/src/output/injectBundles.test.ts
-import { html } from '../../utils.js';
+import { html } from '../../utils.ts';
 ||||||| parent of c37bb778 (chore: migrate tests from mocha/chai to node:test + node:assert):packages/rollup-plugin-html/test/src/output/injectBundles.test.ts
 import { html } from '../../utils.ts';
 =======
 >>>>>>> c37bb778 (chore: migrate tests from mocha/chai to node:test + node:assert):packages/rollup-plugin-html/test/output/injectBundles.test.ts
 
 <<<<<<< HEAD:packages/rollup-plugin-html/test/src/output/injectBundles.test.ts
-import { injectBundles, createLoadScript } from '../../../src/output/injectBundles.js';
+import { injectBundles, createLoadScript } from '../../../src/output/injectBundles.ts';
 ||||||| parent of c37bb778 (chore: migrate tests from mocha/chai to node:test + node:assert):packages/rollup-plugin-html/test/src/output/injectBundles.test.ts
 import { injectBundles, createLoadScript } from '../../../src/output/injectBundles.ts';
 =======
diff --git a/packages/rollup-plugin-polyfills-loader/test/src/utils.test.ts b/packages/rollup-plugin-polyfills-loader/test/src/utils.test.ts
@@ -1,7 +1,7 @@
 import { describe, it } from 'node:test';
 import assert from 'node:assert/strict';
-import { fileTypes } from '@web/polyfills-loader';
-import { shouldInjectLoader } from '../../src/utils.js';
+import { fileTypes } from '@web/polyfills-loader.ts';
+import { shouldInjectLoader } from '../../src/utils.ts';
 
 describe('shouldInjectLoader', () => {
   it('returns true when modern contains non-module or script', () => {
diff --git a/packages/test-runner-commands/test/a11y-snapshot/a11ySnapshotPlugin.test.ts b/packages/test-runner-commands/test/a11y-snapshot/a11ySnapshotPlugin.test.ts
@@ -1,10 +1,10 @@
 import { describe, it } from 'node:test';
 import path from 'path';
-import { runTests } from '@web/test-runner-core/test-helpers';
-import { chromeLauncher } from '@web/test-runner-chrome';
-import { playwrightLauncher } from '@web/test-runner-playwright';
+import { runTests } from '@web/test-runner-core/test-helpers.ts';
+import { chromeLauncher } from '@web/test-runner-chrome.ts';
+import { playwrightLauncher } from '@web/test-runner-playwright.ts';
 
-import { a11ySnapshotPlugin } from '../../dist/a11ySnapshotPlugin.js';
+import { a11ySnapshotPlugin } from '../../dist/a11ySnapshotPlugin.ts';
 
 const __dirname = import.meta.dirname;
 
diff --git a/packages/test-runner-commands/test/emulate-media/emulateMediaPlugin.test.ts b/packages/test-runner-commands/test/emulate-media/emulateMediaPlugin.test.ts
@@ -1,10 +1,10 @@
 import { describe, it } from 'node:test';
 import path from 'path';
-import { runTests } from '@web/test-runner-core/test-helpers';
-import { chromeLauncher } from '@web/test-runner-chrome';
-import { playwrightLauncher } from '@web/test-runner-playwright';
+import { runTests } from '@web/test-runner-core/test-helpers.ts';
+import { chromeLauncher } from '@web/test-runner-chrome.ts';
+import { playwrightLauncher } from '@web/test-runner-playwright.ts';
 
-import { emulateMediaPlugin } from '../../dist/emulateMediaPlugin.js';
+import { emulateMediaPlugin } from '../../dist/emulateMediaPlugin.ts';
 
 const __dirname = import.meta.dirname;
 
diff --git a/packages/test-runner-commands/test/file/filePlugin.test.ts b/packages/test-runner-commands/test/file/filePlugin.test.ts
@@ -1,9 +1,9 @@
 import { describe, it } from 'node:test';
 import path from 'path';
-import { runTests } from '@web/test-runner-core/test-helpers';
-import { chromeLauncher } from '@web/test-runner-chrome';
+import { runTests } from '@web/test-runner-core/test-helpers.ts';
+import { chromeLauncher } from '@web/test-runner-chrome.ts';
 
-import { filePlugin } from '../../dist/filePlugin.js';
+import { filePlugin } from '../../dist/filePlugin.ts';
 
 const __dirname = import.meta.dirname;
 
diff --git a/packages/test-runner-commands/test/select-option/selectOptionPlugin.test.ts b/packages/test-runner-commands/test/select-option/selectOptionPlugin.test.ts
@@ -1,10 +1,10 @@
 import { describe, it } from 'node:test';
 import path from 'path';
-import { runTests } from '@web/test-runner-core/test-helpers';
-import { chromeLauncher } from '@web/test-runner-chrome';
-import { playwrightLauncher } from '@web/test-runner-playwright';
+import { runTests } from '@web/test-runner-core/test-helpers.ts';
+import { chromeLauncher } from '@web/test-runner-chrome.ts';
+import { playwrightLauncher } from '@web/test-runner-playwright.ts';
 
-import { selectOptionPlugin } from '../../dist/selectOptionPlugin.js';
+import { selectOptionPlugin } from '../../dist/selectOptionPlugin.ts';
 
 const __dirname = import.meta.dirname;
 
diff --git a/packages/test-runner-commands/test/send-keys/sendKeysPlugin.test.ts b/packages/test-runner-commands/test/send-keys/sendKeysPlugin.test.ts
@@ -1,10 +1,10 @@
 import { describe, it } from 'node:test';
 import path from 'path';
-import { runTests } from '@web/test-runner-core/test-helpers';
-import { chromeLauncher } from '@web/test-runner-chrome';
-import { playwrightLauncher } from '@web/test-runner-playwright';
+import { runTests } from '@web/test-runner-core/test-helpers.ts';
+import { chromeLauncher } from '@web/test-runner-chrome.ts';
+import { playwrightLauncher } from '@web/test-runner-playwright.ts';
 
-import { sendKeysPlugin } from '../../dist/sendKeysPlugin.js';
+import { sendKeysPlugin } from '../../dist/sendKeysPlugin.ts';
 
 const __dirname = import.meta.dirname;
 
diff --git a/packages/test-runner-commands/test/send-mouse/sendMousePlugin.test.ts b/packages/test-runner-commands/test/send-mouse/sendMousePlugin.test.ts
@@ -1,12 +1,12 @@
 import { describe, it, before, after } from 'node:test';
 import path from 'path';
 import selenium from 'selenium-standalone';
-import { runTests } from '@web/test-runner-core/test-helpers';
-import { chromeLauncher } from '@web/test-runner-chrome';
-import { webdriverLauncher } from '@web/test-runner-webdriver';
-import { playwrightLauncher } from '@web/test-runner-playwright';
-import { sendMousePlugin } from '../../dist/sendMousePlugin.js';
-import { startSeleniumServer } from '../selenium-server.js';
+import { runTests } from '@web/test-runner-core/test-helpers.ts';
+import { chromeLauncher } from '@web/test-runner-chrome.ts';
+import { webdriverLauncher } from '@web/test-runner-webdriver.ts';
+import { playwrightLauncher } from '@web/test-runner-playwright.ts';
+import { sendMousePlugin } from '../../dist/sendMousePlugin.ts';
+import { startSeleniumServer } from '../selenium-server.ts';
 
 const __dirname = import.meta.dirname;
 
diff --git a/packages/test-runner-commands/test/set-user-agent/setUserAgentPlugin.test.ts b/packages/test-runner-commands/test/set-user-agent/setUserAgentPlugin.test.ts
@@ -1,9 +1,9 @@
 import { describe, it } from 'node:test';
 import path from 'path';
-import { runTests } from '@web/test-runner-core/test-helpers';
-import { chromeLauncher } from '@web/test-runner-chrome';
+import { runTests } from '@web/test-runner-core/test-helpers.ts';
+import { chromeLauncher } from '@web/test-runner-chrome.ts';
 
-import { setUserAgentPlugin } from '../../dist/setUserAgentPlugin.js';
+import { setUserAgentPlugin } from '../../dist/setUserAgentPlugin.ts';
 
 const __dirname = import.meta.dirname;
 
diff --git a/packages/test-runner-commands/test/set-viewport/setViewportPlugin.test.ts b/packages/test-runner-commands/test/set-viewport/setViewportPlugin.test.ts
@@ -1,11 +1,11 @@
 import { describe, it } from 'node:test';
 import path from 'path';
 
-import { runTests } from '@web/test-runner-core/test-helpers';
-import { chromeLauncher } from '@web/test-runner-chrome';
-import { playwrightLauncher } from '@web/test-runner-playwright';
+import { runTests } from '@web/test-runner-core/test-helpers.ts';
+import { chromeLauncher } from '@web/test-runner-chrome.ts';
+import { playwrightLauncher } from '@web/test-runner-playwright.ts';
 
-import { setViewportPlugin } from '../../dist/setViewportPlugin.js';
+import { setViewportPlugin } from '../../dist/setViewportPlugin.ts';
 
 const __dirname = import.meta.dirname;
 
diff --git a/packages/test-runner-commands/test/snapshot/snapshotPlugin.test.ts b/packages/test-runner-commands/test/snapshot/snapshotPlugin.test.ts
@@ -1,9 +1,9 @@
 import { describe, it } from 'node:test';
 import path from 'path';
-import { runTests } from '@web/test-runner-core/test-helpers';
-import { playwrightLauncher } from '@web/test-runner-playwright';
+import { runTests } from '@web/test-runner-core/test-helpers.ts';
+import { playwrightLauncher } from '@web/test-runner-playwright.ts';
 
-import { snapshotPlugin } from '../../dist/snapshotPlugin.js';
+import { snapshotPlugin } from '../../dist/snapshotPlugin.ts';
 
 const __dirname = import.meta.dirname;
 
diff --git a/packages/test-runner-core/test/src/runner/TestRunner.test.ts b/packages/test-runner-core/test/src/runner/TestRunner.test.ts
diff --git a/packages/test-runner-core/test/src/runner/TestScheduler.test.ts b/packages/test-runner-core/test/src/runner/TestScheduler.test.ts
diff --git a/packages/test-runner-junit-reporter/test/junitReporter.test.ts b/packages/test-runner-junit-reporter/test/junitReporter.test.ts
diff --git a/packages/test-runner-module-mocking/test/moduleMockingPlugin.test.ts b/packages/test-runner-module-mocking/test/moduleMockingPlugin.test.ts
diff --git a/packages/test-runner-visual-regression/test/visualRegressionPlugin.test.ts b/packages/test-runner-visual-regression/test/visualRegressionPlugin.test.ts
