diff --git a/.eslintignore b/.eslintignore
index c2d3e8400..28768c1b9 100644
--- a/.eslintignore
+++ b/.eslintignore
@@ -1,8 +1,9 @@
-**/*.js
-**/*.ts
-!packages/astro/**/*.js
-!packages/astro/**/*.ts
-packages/astro/test/**/*.js
+**/*.d.ts
+packages/**/dist/**/*
+packages/**/fixtures/**/*
+packages/webapi/**/*
 packages/astro/vendor/vite/**/*
+examples/**/*
+scripts/**/*
 .github
 .changeset
diff --git a/.eslintrc.cjs b/.eslintrc.cjs
index d2d00d081..6cba70e1a 100644
--- a/.eslintrc.cjs
+++ b/.eslintrc.cjs
@@ -1,7 +1,7 @@
 module.exports = {
   parser: '@typescript-eslint/parser',
   extends: ['plugin:@typescript-eslint/recommended', 'prettier'],
-  plugins: ['@typescript-eslint', 'prettier'],
+  plugins: ['@typescript-eslint', 'prettier', 'no-only-tests'],
   rules: {
     '@typescript-eslint/ban-ts-comment': 'off',
     '@typescript-eslint/camelcase': 'off',
@@ -17,5 +17,6 @@ module.exports = {
     'prefer-const': 'off',
     'no-shadow': 'off',
     '@typescript-eslint/no-shadow': ['error'],
+    'no-only-tests/no-only-tests': 'error'
   },
 };
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 16791b110..df472da10 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -54,9 +54,6 @@ jobs:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
         with:
           eslint: true
-          eslint_args: --ignore-pattern test --ignore-pattern vendor
-          eslint_dir: packages/astro
-          eslint_extensions: ts
           prettier: false
           auto_fix: true
           git_name: github-actions[bot]
diff --git a/package.json b/package.json
index 3be9d8e87..fa8f13392 100644
--- a/package.json
+++ b/package.json
@@ -25,7 +25,7 @@
     "test:e2e": "cd packages/astro && pnpm playwright install && pnpm run test:e2e",
     "test:e2e:match": "cd packages/astro && pnpm playwright install && pnpm run test:e2e:match",
     "benchmark": "turbo run benchmark --scope=astro",
-    "lint": "eslint \"packages/**/*.ts\"",
+    "lint": "eslint .",
     "version": "changeset version && pnpm install --no-frozen-lockfile && pnpm run format"
   },
   "workspaces": [
@@ -69,6 +69,7 @@
     "esbuild": "^0.14.42",
     "eslint": "^8.16.0",
     "eslint-config-prettier": "^8.5.0",
+    "eslint-plugin-no-only-tests": "^2.6.0",
     "eslint-plugin-prettier": "^4.0.0",
     "execa": "^6.1.0",
     "organize-imports-cli": "^0.10.0",
diff --git a/packages/astro/e2e/ts-resolution.test.js b/packages/astro/e2e/ts-resolution.test.js
index b1d1fcef6..b8d8cf9f9 100644
--- a/packages/astro/e2e/ts-resolution.test.js
+++ b/packages/astro/e2e/ts-resolution.test.js
@@ -8,8 +8,8 @@ const test = base.extend({
 	},
 });
 
-function runTest(test) {
-	test('client:idle', async ({ page, astro }) => {
+function runTest(it) {
+	it('client:idle', async ({ page, astro }) => {
 		await page.goto(astro.resolveUrl('/'));
 
 		const counter = page.locator('#client-idle');
diff --git a/packages/astro/test/astro-css-bundling.test.js b/packages/astro/test/astro-css-bundling.test.js
index 3170b796d..1c470c0ef 100644
--- a/packages/astro/test/astro-css-bundling.test.js
+++ b/packages/astro/test/astro-css-bundling.test.js
@@ -52,8 +52,8 @@ describe('CSS Bundling', function () {
 
 			// test 3: assert all bundled CSS was built and contains CSS
 			for (const url of builtCSS.keys()) {
-				const css = await fixture.readFile(url);
-				expect(css).to.be.ok;
+				const bundledCss = await fixture.readFile(url);
+				expect(bundledCss).to.be.ok;
 			}
 		}
 	});
diff --git a/packages/astro/test/sass.test.js b/packages/astro/test/sass.test.js
index 4072d5547..07c1f1499 100644
--- a/packages/astro/test/sass.test.js
+++ b/packages/astro/test/sass.test.js
@@ -20,7 +20,7 @@ describe('Sass', () => {
 	// TODO: Sass cannot be found on macOS for some reason... Vite issue?
 	const test = os.platform() === 'darwin' ? it.skip : it;
 	test('shows helpful error on failure', async () => {
-		const res = await fixture.fetch('/error').then((res) => res.text());
-		expect(res).to.include('Undefined variable');
+		const text = await fixture.fetch('/error').then((res) => res.text());
+		expect(text).to.include('Undefined variable');
 	});
 });
diff --git a/packages/astro/test/ssr-adapter-build-config.test.js b/packages/astro/test/ssr-adapter-build-config.test.js
index bb1c4514a..37c6ec923 100644
--- a/packages/astro/test/ssr-adapter-build-config.test.js
+++ b/packages/astro/test/ssr-adapter-build-config.test.js
@@ -26,8 +26,8 @@ describe('Integration buildConfig hook', () => {
 											if (id === '@my-ssr') {
 												return id;
 											} else if (id === 'astro/app') {
-												const id = viteID(new URL('../dist/core/app/index.js', import.meta.url));
-												return id;
+												const viteId = viteID(new URL('../dist/core/app/index.js', import.meta.url));
+												return viteId;
 											}
 										},
 										load(id) {
diff --git a/packages/astro/test/static-build-page-dist-url.test.js b/packages/astro/test/static-build-page-dist-url.test.js
index 59adbc57c..cf9839926 100644
--- a/packages/astro/test/static-build-page-dist-url.test.js
+++ b/packages/astro/test/static-build-page-dist-url.test.js
@@ -2,11 +2,10 @@ import { expect } from 'chai';
 import { loadFixture } from './test-utils.js';
 
 describe('Static build: pages routes have distURL', () => {
-	/** @type {import('./test-utils').Fixture} */
-	let fixture;
 	/** @type {RouteData[]} */
 	let checkRoutes;
 	before(async () => {
+		/** @type {import('./test-utils').Fixture} */
 		const fixture = await loadFixture({
 			root: './fixtures/astro pages/',
 			integrations: [
diff --git a/packages/astro/test/tailwindcss.test.js b/packages/astro/test/tailwindcss.test.js
index 15723c456..7a59aebe5 100644
--- a/packages/astro/test/tailwindcss.test.js
+++ b/packages/astro/test/tailwindcss.test.js
@@ -2,8 +2,6 @@ import { expect } from 'chai';
 import * as cheerio from 'cheerio';
 import { loadFixture } from './test-utils.js';
 
-let fixture;
-
 describe('Tailwind', () => {
 	let fixture;
 
@@ -62,10 +60,10 @@ describe('Tailwind', () => {
 
 		it('handles Markdown pages', async () => {
 			const html = await fixture.readFile('/markdown-page/index.html');
-			const $ = cheerio.load(html);
-			const bundledCSSHREF = $('link[rel=stylesheet][href^=/assets/]').attr('href');
-			const bundledCSS = await fixture.readFile(bundledCSSHREF.replace(/^\/?/, '/'));
-			expect(bundledCSS, 'includes used component classes').to.match(/\.bg-purple-600{/);
+			const $md = cheerio.load(html);
+			const bundledCSSHREF = $md('link[rel=stylesheet][href^=/assets/]').attr('href');
+			const mdBundledCSS = await fixture.readFile(bundledCSSHREF.replace(/^\/?/, '/'));
+			expect(mdBundledCSS, 'includes used component classes').to.match(/\.bg-purple-600{/);
 		});
 	});
 });
diff --git a/packages/astro/test/test-adapter.js b/packages/astro/test/test-adapter.js
index 99ab34e5d..0ed8014ce 100644
--- a/packages/astro/test/test-adapter.js
+++ b/packages/astro/test/test-adapter.js
@@ -17,8 +17,8 @@ export default function () {
 									if (id === '@my-ssr') {
 										return id;
 									} else if (id === 'astro/app') {
-										const id = viteID(new URL('../dist/core/app/index.js', import.meta.url));
-										return id;
+										const viteId = viteID(new URL('../dist/core/app/index.js', import.meta.url));
+										return viteId;
 									}
 								},
 								load(id) {
diff --git a/packages/create-astro/src/index.ts b/packages/create-astro/src/index.ts
index 4fb6cec28..08396a4e8 100644
--- a/packages/create-astro/src/index.ts
+++ b/packages/create-astro/src/index.ts
@@ -1,3 +1,4 @@
+/* eslint no-console: 'off' */
 import degit from 'degit';
 import { execa, execaCommand } from 'execa';
 import fs from 'fs';
diff --git a/packages/create-astro/test/directory-step.test.js b/packages/create-astro/test/directory-step.test.js
index 7193fe298..7c629598a 100644
--- a/packages/create-astro/test/directory-step.test.js
+++ b/packages/create-astro/test/directory-step.test.js
@@ -1,4 +1,4 @@
-import { resolve } from 'path';
+import path from 'path';
 import { promises, existsSync } from 'fs';
 import { PROMPT_MESSAGES, testDir, setup, promiseWithTimeout, timeout } from './utils.js';
 
@@ -31,7 +31,7 @@ describe('[create-astro] select directory', function () {
 		});
 	});
 	it('should proceed on an empty directory', async function () {
-		const resolvedEmptyDirPath = resolve(testDir, inputs.emptyDir);
+		const resolvedEmptyDirPath = path.resolve(testDir, inputs.emptyDir);
 		if (!existsSync(resolvedEmptyDirPath)) {
 			await promises.mkdir(resolvedEmptyDirPath);
 		}
diff --git a/packages/integrations/deno/src/server.ts b/packages/integrations/deno/src/server.ts
index eb83c8eae..9d2fc98a9 100644
--- a/packages/integrations/deno/src/server.ts
+++ b/packages/integrations/deno/src/server.ts
@@ -45,6 +45,7 @@ export function start(manifest: SSRManifest, options: Options) {
 	});
 
 	_startPromise = Promise.resolve(_server.listenAndServe());
+	// eslint-disable-next-line no-console
 	console.error(`Server running on port ${port}`);
 }
 
diff --git a/packages/integrations/netlify/test/edge-functions/dynamic-import.test.js b/packages/integrations/netlify/test/edge-functions/dynamic-import.test.js
index 2a261b7f6..82961ab8b 100644
--- a/packages/integrations/netlify/test/edge-functions/dynamic-import.test.js
+++ b/packages/integrations/netlify/test/edge-functions/dynamic-import.test.js
@@ -20,6 +20,7 @@ Deno.test({
 			const div = doc.querySelector('#thing');
 			assert(div, 'div exists');
 		} catch (err) {
+			// eslint-disable-next-line no-console
 			console.error(err);
 		} finally {
 			await close();
diff --git a/packages/integrations/partytown/src/sirv.ts b/packages/integrations/partytown/src/sirv.ts
index aab0c7d96..fa9f9ad25 100644
--- a/packages/integrations/partytown/src/sirv.ts
+++ b/packages/integrations/partytown/src/sirv.ts
@@ -200,7 +200,7 @@ export default function (dir, opts = {}) {
 		});
 	}
 
-	let lookup = opts.dev ? viaLocal.bind(0, dir, isEtag) : viaCache.bind(0, FILES);
+	let fileLookup = opts.dev ? viaLocal.bind(0, dir, isEtag) : viaCache.bind(0, FILES);
 
 	return function (req, res, next) {
 		let extns = [''];
@@ -224,7 +224,7 @@ export default function (dir, opts = {}) {
 		}
 
 		let data =
-			lookup(pathname, extns) || (isSPA && !isMatch(pathname, ignores) && lookup(fallback, extns));
+		fileLookup(pathname, extns) || (isSPA && !isMatch(pathname, ignores) && fileLookup(fallback, extns));
 		if (!data) return next ? next() : isNotFound(req, res);
 
 		if (isEtag && req.headers['if-none-match'] === data.headers['ETag']) {
diff --git a/packages/integrations/sitemap/src/utils/logger.ts b/packages/integrations/sitemap/src/utils/logger.ts
index 203baeaa7..3292bbdfc 100644
--- a/packages/integrations/sitemap/src/utils/logger.ts
+++ b/packages/integrations/sitemap/src/utils/logger.ts
@@ -23,7 +23,7 @@ export class Logger implements ILogger {
 		this.packageName = packageName;
 	}
 
-	private log(msg: string, prefix: string = '') {
+	private log(msg: string, prefix = '') {
 		// eslint-disable-next-line no-console
 		console.log(`%s${this.packageName}:%s ${msg}\n`, prefix, prefix ? this.colors.reset : '');
 	}
diff --git a/packages/integrations/sitemap/src/validate-options.ts b/packages/integrations/sitemap/src/validate-options.ts
index e4b458003..f51750ff5 100644
--- a/packages/integrations/sitemap/src/validate-options.ts
+++ b/packages/integrations/sitemap/src/validate-options.ts
@@ -10,7 +10,7 @@ export const validateOptions = (site: string | undefined, opts: SitemapOptions)
 		site: z.string().optional(), // Astro takes care of `site`: how to validate, transform and refine
 		canonicalURL: z.string().optional(), // `canonicalURL` is already validated in prev step
 	})
-		.refine(({ site, canonicalURL }) => site || canonicalURL, {
+		.refine((options) => options.site || options.canonicalURL, {
 			message: 'Required `site` astro.config option or `canonicalURL` integration option',
 		})
 		.parse({
diff --git a/packages/integrations/vercel/src/lib/fs.ts b/packages/integrations/vercel/src/lib/fs.ts
index e192ba554..d7a833cd0 100644
--- a/packages/integrations/vercel/src/lib/fs.ts
+++ b/packages/integrations/vercel/src/lib/fs.ts
@@ -1,7 +1,7 @@
 import type { PathLike } from 'node:fs';
 import * as fs from 'node:fs/promises';
 
-export async function writeJson<T extends any>(path: PathLike, data: T) {
+export async function writeJson<T>(path: PathLike, data: T) {
 	await fs.writeFile(path, JSON.stringify(data), { encoding: 'utf-8' });
 }
 
diff --git a/packages/markdown/remark/src/index.ts b/packages/markdown/remark/src/index.ts
index 7034564c3..567a4414d 100644
--- a/packages/markdown/remark/src/index.ts
+++ b/packages/markdown/remark/src/index.ts
@@ -57,8 +57,8 @@ export async function renderMarkdown(
 	const loadedRemarkPlugins = await Promise.all(loadPlugins(remarkPlugins));
 	const loadedRehypePlugins = await Promise.all(loadPlugins(rehypePlugins));
 
-	loadedRemarkPlugins.forEach(([plugin, opts]) => {
-		parser.use([[plugin, opts]]);
+	loadedRemarkPlugins.forEach(([plugin, pluginOpts]) => {
+		parser.use([[plugin, pluginOpts]]);
 	});
 
 	if (scopedClassName) {
@@ -87,8 +87,8 @@ export async function renderMarkdown(
 		],
 	]);
 
-	loadedRehypePlugins.forEach(([plugin, opts]) => {
-		parser.use([[plugin, opts]]);
+	loadedRehypePlugins.forEach(([plugin, pluginOpts]) => {
+		parser.use([[plugin, pluginOpts]]);
 	});
 
 	parser
@@ -106,6 +106,7 @@ export async function renderMarkdown(
 		// Ensure that the error message contains the input filename
 		// to make it easier for the user to fix the issue
 		err = prefixError(err, `Failed to parse Markdown file "${input.path}"`);
+		// eslint-disable-next-line no-console
 		console.error(err);
 		throw err;
 	}
diff --git a/packages/markdown/remark/src/rehype-collect-headers.ts b/packages/markdown/remark/src/rehype-collect-headers.ts
index 76cb5740c..f8cedd0d5 100644
--- a/packages/markdown/remark/src/rehype-collect-headers.ts
+++ b/packages/markdown/remark/src/rehype-collect-headers.ts
@@ -20,7 +20,7 @@ export default function createCollectHeaders() {
 
 				let text = '';
 				let isJSX = false;
-				visit(node, (child, _, parent) => {
+				visit(node, (child, __, parent) => {
 					if (child.type === 'element' || parent == null) {
 						return;
 					}
diff --git a/packages/markdown/remark/src/remark-prism.ts b/packages/markdown/remark/src/remark-prism.ts
index caa50f738..8f1173af0 100644
--- a/packages/markdown/remark/src/remark-prism.ts
+++ b/packages/markdown/remark/src/remark-prism.ts
@@ -13,9 +13,9 @@ function runHighlighter(lang: string, code: string) {
 		lang = 'plaintext';
 	}
 
-	const ensureLoaded = (lang: string) => {
-		if (lang && !Prism.languages[lang]) {
-			loadLanguages([lang]);
+	const ensureLoaded = (language: string) => {
+		if (language && !Prism.languages[language]) {
+			loadLanguages([language]);
 		}
 	};
 
@@ -30,6 +30,7 @@ function runHighlighter(lang: string, code: string) {
 	}
 
 	if (lang && !Prism.languages[lang]) {
+		// eslint-disable-next-line no-console
 		console.warn(`Unable to load the language: ${lang}`);
 	}
 
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 254f0bcb6..accfd82bf 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -14,6 +14,7 @@ importers:
       esbuild: ^0.14.42
       eslint: ^8.16.0
       eslint-config-prettier: ^8.5.0
+      eslint-plugin-no-only-tests: ^2.6.0
       eslint-plugin-prettier: ^4.0.0
       execa: ^6.1.0
       organize-imports-cli: ^0.10.0
@@ -35,6 +36,7 @@ importers:
       esbuild: 0.14.43
       eslint: 8.17.0
       eslint-config-prettier: 8.5.0_eslint@8.17.0
+      eslint-plugin-no-only-tests: 2.6.0
       eslint-plugin-prettier: 4.0.0_ucegkljdju7q4zmvwxzqoprf3y
       execa: 6.1.0
       organize-imports-cli: 0.10.0
@@ -8248,6 +8250,11 @@ packages:
 
   /debug/3.2.7:
     resolution: {integrity: sha512-CFjzYYAi4ThfiQvizrFQevTTXHtnCqWfe7x1AhgEscTz6ZbLbfoLRLPugTQyBth6f8ZERVUSyWHFD/7Wu4t1XQ==}
+    peerDependencies:
+      supports-color: '*'
+    peerDependenciesMeta:
+      supports-color:
+        optional: true
     dependencies:
       ms: 2.1.3
     dev: false
@@ -8883,6 +8890,11 @@ packages:
       eslint: 8.17.0
     dev: true
 
+  /eslint-plugin-no-only-tests/2.6.0:
+    resolution: {integrity: sha512-T9SmE/g6UV1uZo1oHAqOvL86XWl7Pl2EpRpnLI8g/bkJu+h7XBCB+1LnubRZ2CUQXj805vh4/CYZdnqtVaEo2Q==}
+    engines: {node: '>=4.0.0'}
+    dev: true
+
   /eslint-plugin-prettier/4.0.0_ucegkljdju7q4zmvwxzqoprf3y:
     resolution: {integrity: sha512-98MqmCJ7vJodoQK359bqQWaxOE0CS8paAz/GgjaZLyex4TTk3g9HugoO89EqWCrFiOqn9EVvcoo7gZzONCWVwQ==}
     engines: {node: '>=6.0.0'}
@@ -11164,6 +11176,8 @@ packages:
       debug: 3.2.7
       iconv-lite: 0.4.24
       sax: 1.2.4
+    transitivePeerDependencies:
+      - supports-color
     dev: false
 
   /netmask/2.0.2:
@@ -11247,6 +11261,8 @@ packages:
       rimraf: 2.7.1
       semver: 5.7.1
       tar: 4.4.19
+    transitivePeerDependencies:
+      - supports-color
     dev: false
 
   /node-releases/2.0.5: