diff --git a/package.json b/package.json
index 93e1804108..e51ba025d8 100644
--- a/package.json
+++ b/package.json
@@ -18,16 +18,14 @@
     "tsc": "tsc -p .",
     "tsc-installer": "tsc -p ./src/install/tsconfig.json",
     "doc": "node utils/doclint/cli.js",
-    "test-infra": "folio utils/doclint/check_public_api/test/testMissingDocs.js && folio utils/doclint/preprocessor/test.js",
-    "lint": "npm run eslint && npm run tsc && npm run doc && npm run check-deps && npm run generate-channels && node utils/generate_types/ --check-clean && npm run test-types && npm run test-infra",
-    "clean": "rimraf lib && rimraf types",
+    "lint": "npm run eslint && npm run tsc && npm run doc && npm run check-deps && npm run generate-channels && node utils/generate_types/ --check-clean && npm run test-types && folio utils/doclint/test/",
+    "clean": "rimraf lib",
     "prepare": "node install-from-github.js",
     "build": "node utils/runWebpack.js --mode='development' && tsc -p . && npm run generate-api-json",
     "watch": "node utils/watch.js",
-    "test-types": "node utils/generate_types/ && npx -p typescript@3.7.5 tsc -p utils/generate_types/test/tsconfig.json && npm run typecheck-tests",
+    "test-types": "node utils/generate_types/ && npx -p typescript@3.7.5 tsc -p utils/generate_types/test/tsconfig.json && tsc -p ./test/",
     "generate-channels": "node utils/generate_channels.js",
     "generate-api-json": "node utils/doclint/generateApiJson.js > docs/api.json",
-    "typecheck-tests": "tsc -p ./test/",
     "roll-browser": "node utils/roll_browser.js",
     "coverage": "node test/checkCoverage.js",
     "check-deps": "node utils/check_deps.js",
diff --git a/utils/doclint/.gitignore b/utils/doclint/.gitignore
deleted file mode 100644
index ea1472ec1f..0000000000
--- a/utils/doclint/.gitignore
+++ /dev/null
@@ -1 +0,0 @@
-output/
diff --git a/utils/doclint/check_public_api/Documentation.js b/utils/doclint/Documentation.js
similarity index 100%
rename from utils/doclint/check_public_api/Documentation.js
rename to utils/doclint/Documentation.js
diff --git a/utils/doclint/check_public_api/MDBuilder.js b/utils/doclint/MDBuilder.js
similarity index 99%
rename from utils/doclint/check_public_api/MDBuilder.js
rename to utils/doclint/MDBuilder.js
index 37cf5ca930..a66a980ce5 100644
--- a/utils/doclint/check_public_api/MDBuilder.js
+++ b/utils/doclint/MDBuilder.js
@@ -16,7 +16,7 @@
 
 // @ts-check
 
-const { parseArgument, renderMd, clone } = require('../../parse_md');
+const { parseArgument, renderMd, clone } = require('../parse_md');
 const Documentation = require('./Documentation');
 
 /** @typedef {import('./Documentation').MarkdownNode} MarkdownNode */
@@ -159,7 +159,7 @@ function patchSignatures(spec, signatures) {
 }
 
 /**
- * @param {string} text 
+ * @param {string} text
  * @returns {string}
  */
 function createLink(text) {
diff --git a/utils/doclint/Message.js b/utils/doclint/Message.js
deleted file mode 100644
index cb7d15aeca..0000000000
--- a/utils/doclint/Message.js
+++ /dev/null
@@ -1,44 +0,0 @@
-/**
- * Copyright 2017 Google Inc. All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-class Message {
-  /**
-   * @param {string} type
-   * @param {string} text
-   */
-  constructor(type, text) {
-    this.type = type;
-    this.text = text;
-  }
-
-  /**
-   * @param {string} text
-   * @return {!Message}
-   */
-  static error(text) {
-    return new Message('error', text);
-  }
-
-  /**
-   * @param {string} text
-   * @return {!Message}
-   */
-  static warning(text) {
-    return new Message('warning', text);
-  }
-}
-
-module.exports = Message;
diff --git a/utils/doclint/README.md b/utils/doclint/README.md
deleted file mode 100644
index 3187990b8b..0000000000
--- a/utils/doclint/README.md
+++ /dev/null
@@ -1,30 +0,0 @@
-# DocLint
-
-**Doclint** is a small program that lints Playwright's documentation against
-Playwright's source code.
-
-Doclint works in a few steps:
-
-1. Read sources in `lib/` folder, parse AST trees and extract public API
-2. Read sources in `docs/` folder, render markdown to HTML, use playwright to traverse the HTML
-  and extract described API
-3. Compare one API to another
-
-Doclint is also responsible for general markdown checks, most notably for the table of contents
-relevancy.
-
-## Running
-
-```bash
-npm run doc
-```
-
-## Tests
-
-Doclint has its own set of jasmine tests, located at `utils/doclint/test` folder.
-
-To execute tests, run:
-
-```bash
-npm run test-doclint
-```
diff --git a/utils/doclint/cli.js b/utils/doclint/cli.js
index cb136b10e6..00cf5fb7f9 100755
--- a/utils/doclint/cli.js
+++ b/utils/doclint/cli.js
@@ -21,14 +21,13 @@ const playwright = require('../../');
 const fs = require('fs');
 const path = require('path');
 const Source = require('./Source');
-const Message = require('./Message');
 const { parseMd, renderMd, applyTemplates, clone } = require('./../parse_md');
 const { spawnSync } = require('child_process');
 const preprocessor = require('./preprocessor');
-const mdBuilder = require('./check_public_api/MDBuilder');
+const mdBuilder = require('./MDBuilder');
 
-/** @typedef {import('./check_public_api/Documentation').MarkdownNode} MarkdownNode */
-/** @typedef {import('./check_public_api/Documentation').Type} Type */
+/** @typedef {import('./Documentation').MarkdownNode} MarkdownNode */
+/** @typedef {import('./Documentation').Type} Type */
 
 const PROJECT_DIR = path.join(__dirname, '..', '..');
 const VERSION = require(path.join(PROJECT_DIR, 'package.json')).version;
@@ -52,8 +51,8 @@ async function run() {
   const docs = await Source.readdir(path.join(PROJECT_DIR, 'docs'), '.md');
   const mdSources = [readme, binReadme, api, contributing, ...docs];
 
-  /** @type {!Array<!Message>} */
-  const messages = [];
+  /** @type {!Array<string>} */
+  const errors = [];
   let changedFiles = false;
 
   const header = fs.readFileSync(path.join(PROJECT_DIR, 'docs-src', 'api-header.md')).toString();
@@ -128,20 +127,20 @@ async function run() {
   // Documentation checks.
   {
     const browserVersions = await getBrowserVersions();
-    messages.push(...(await preprocessor.runCommands(mdSources, {
+    errors.push(...(await preprocessor.runCommands(mdSources, {
       libversion: VERSION,
       chromiumVersion: browserVersions.chromium,
       firefoxVersion: browserVersions.firefox,
       webkitVersion: browserVersions.webkit,
     })));
 
-    messages.push(...preprocessor.autocorrectInvalidLinks(PROJECT_DIR, mdSources, getRepositoryFiles()));
+    errors.push(...preprocessor.autocorrectInvalidLinks(PROJECT_DIR, mdSources, getRepositoryFiles()));
     for (const source of mdSources.filter(source => source.hasUpdatedText()))
-      messages.push(Message.warning(`WARN: updated ${source.projectPath()}`));
+      errors.push(`WARN: updated ${source.projectPath()}`);
 
     const jsSources = await Source.readdir(path.join(PROJECT_DIR, 'src', 'client'), '', []);
-    const missingDocs = require('./check_public_api/missingDocs.js');
-    messages.push(...missingDocs(apiSpec, jsSources, path.join(PROJECT_DIR, 'src', 'client', 'api.ts')));
+    const missingDocs = require('./missingDocs.js');
+    errors.push(...missingDocs(apiSpec, jsSources, path.join(PROJECT_DIR, 'src', 'client', 'api.ts')));
 
     for (const source of mdSources) {
       if (!source.hasUpdatedText())
@@ -152,31 +151,19 @@ async function run() {
   }
 
   // Report results.
-  const errors = messages.filter(message => message.type === 'error');
   if (errors.length) {
-    console.log('DocLint Failures:');
     for (let i = 0; i < errors.length; ++i) {
-      let error = errors[i].text;
-      error = error.split('\n').join('\n      ');
+      const error = errors[i].split('\n').join('\n      ');
       console.log(`  ${i + 1}) ${RED_COLOR}${error}${RESET_COLOR}`);
     }
   }
-  const warnings = messages.filter(message => message.type === 'warning');
-  if (warnings.length) {
-    console.log('DocLint Warnings:');
-    for (let i = 0; i < warnings.length; ++i) {
-      let warning = warnings[i].text;
-      warning = warning.split('\n').join('\n      ');
-      console.log(`  ${i + 1}) ${YELLOW_COLOR}${warning}${RESET_COLOR}`);
-    }
-  }
-  let clearExit = messages.length === 0;
+  let clearExit = errors.length === 0;
   if (changedFiles) {
     if (clearExit)
       console.log(`${YELLOW_COLOR}Some files were updated.${RESET_COLOR}`);
     clearExit = false;
   }
-  console.log(`${errors.length} failures, ${warnings.length} warnings.`);
+  console.log(`${errors.length} failures.`);
   const runningTime = Date.now() - startTime;
   console.log(`DocLint Finished in ${runningTime / 1000} seconds`);
   process.exit(clearExit ? 0 : 1);
diff --git a/utils/doclint/generateApiJson.js b/utils/doclint/generateApiJson.js
index a75574d2c6..20d87fc7d9 100644
--- a/utils/doclint/generateApiJson.js
+++ b/utils/doclint/generateApiJson.js
@@ -17,7 +17,7 @@
 const fs = require('fs');
 const path = require('path');
 const { parseMd, applyTemplates } = require('../parse_md');
-const mdBuilder = require('./check_public_api/MDBuilder');
+const mdBuilder = require('./MDBuilder');
 const PROJECT_DIR = path.join(__dirname, '..', '..');
 
 {
diff --git a/utils/doclint/check_public_api/missingDocs.js b/utils/doclint/missingDocs.js
similarity index 88%
rename from utils/doclint/check_public_api/missingDocs.js
rename to utils/doclint/missingDocs.js
index df338989a0..a6636c6cf3 100644
--- a/utils/doclint/check_public_api/missingDocs.js
+++ b/utils/doclint/missingDocs.js
@@ -16,13 +16,12 @@
  */
 
 const mdBuilder = require('./MDBuilder');
-const Message = require('../Message');
 const ts = require('typescript');
 const EventEmitter = require('events');
 const Documentation = require('./Documentation');
 
 /**
- * @return {!Array<!Message>}
+ * @return {!Array<string>}
  */
 module.exports = function lint(api, jsSources, apiFileName) {
   const documentation = mdBuilder(api, true).documentation;
@@ -31,26 +30,26 @@ module.exports = function lint(api, jsSources, apiFileName) {
   for (const [className, methods] of apiMethods) {
     const docClass = documentation.classes.get(className);
     if (!docClass) {
-      errors.push(Message.error(`Missing documentation for "${className}"`));
+      errors.push(`Missing documentation for "${className}"`);
       continue;
     }
     for (const [methodName, params] of methods) {
       const member = docClass.members.get(methodName);
       if (!member) {
-        errors.push(Message.error(`Missing documentation for "${className}.${methodName}"`));
+        errors.push(`Missing documentation for "${className}.${methodName}"`);
         continue;
       }
       const memberParams = paramsForMember(member);
       for (const paramName of params) {
         if (!memberParams.has(paramName))
-          errors.push(Message.error(`Missing documentation for "${className}.${methodName}.${paramName}"`));
+          errors.push(`Missing documentation for "${className}.${methodName}.${paramName}"`);
       }
     }
   }
   for (const cls of documentation.classesArray) {
     const methods = apiMethods.get(cls.name);
     if (!methods) {
-      errors.push(Message.error(`Documented "${cls.name}" not found in sources`));
+      errors.push(`Documented "${cls.name}" not found in sources`);
       continue;
     }
     for (const member of cls.membersArray) {
@@ -58,13 +57,13 @@ module.exports = function lint(api, jsSources, apiFileName) {
         continue;
       const params = methods.get(member.name);
       if (!params) {
-        errors.push(Message.error(`Documented "${cls.name}.${member.name}" not found is sources`));
+        errors.push(`Documented "${cls.name}.${member.name}" not found is sources`);
         continue;
       }
       const memberParams = paramsForMember(member);
       for (const paramName of memberParams) {
         if (!params.has(paramName))
-          errors.push(Message.error(`Documented "${cls.name}.${member.name}.${paramName}" not found is sources`));
+          errors.push(`Documented "${cls.name}.${member.name}.${paramName}" not found is sources`);
       }
     }
   }
diff --git a/utils/doclint/preprocessor/index.js b/utils/doclint/preprocessor.js
similarity index 91%
rename from utils/doclint/preprocessor/index.js
rename to utils/doclint/preprocessor.js
index ea9d127038..8cde57606e 100644
--- a/utils/doclint/preprocessor/index.js
+++ b/utils/doclint/preprocessor.js
@@ -15,13 +15,12 @@
  */
 
 const path = require('path');
-const Message = require('../Message');
 
 function runCommands(sources, {libversion, chromiumVersion, firefoxVersion, webkitVersion}) {
   // Release version is everything that doesn't include "-".
   const isReleaseVersion = !libversion.includes('-');
 
-  const messages = [];
+  const errors = [];
   for (const source of sources) {
     const text = source.text();
     const commandStartRegex = /<!--\s*gen:([a-z-]+)\s*-->/ig;
@@ -34,8 +33,8 @@ function runCommands(sources, {libversion, chromiumVersion, firefoxVersion, webk
       commandEndRegex.lastIndex = commandStartRegex.lastIndex;
       const end = commandEndRegex.exec(text);
       if (!end) {
-        messages.push(Message.error(`Failed to find 'gen:stop' for command ${start[0]}`));
-        return messages;
+        errors.push(`Failed to find 'gen:stop' for command ${start[0]}`);
+        return errors;
       }
       const commandName = start[1];
       const from = commandStartRegex.lastIndex;
@@ -63,13 +62,13 @@ function runCommands(sources, {libversion, chromiumVersion, firefoxVersion, webk
         newText = generateTableOfContentsForSuperclass(source.text(), 'class: ' + commandName.substring('toc-extends-'.length));
 
       if (newText === null)
-        messages.push(Message.error(`Unknown command 'gen:${commandName}'`));
+        errors.push(`Unknown command 'gen:${commandName}'`);
       else
         sourceEdits.edit(from, to, newText);
     }
-    sourceEdits.commit(messages);
+    sourceEdits.commit(errors);
   }
-  return messages;
+  return errors;
 };
 
 function getTOCEntriesForText(text) {
@@ -117,7 +116,7 @@ function autocorrectInvalidLinks(projectRoot, sources, allowedFilePaths) {
     pathToHashLinks.set(source.filePath(), hashLinks);
   }
 
-  const messages = [];
+  const errors = [];
   for (const source of sources) {
     const allRelativePaths = [];
     for (const filepath of allowedFilePaths) {
@@ -146,7 +145,7 @@ function autocorrectInvalidLinks(projectRoot, sources, allowedFilePaths) {
           // Attempt to autocorrect
           const newRelativePath = autocorrectText(relativePath, allRelativePaths);
           if (!newRelativePath) {
-            messages.push(Message.error(`Bad link in ${source.projectPath()}:${lineNumber + 1}: file ${relativePath} does not exist`));
+            errors.push(`Bad link in ${source.projectPath()}:${lineNumber + 1}: file ${relativePath} does not exist`);
             continue;
           }
           resolvedPath = resolveLinkPath(source, newRelativePath);
@@ -161,15 +160,15 @@ function autocorrectInvalidLinks(projectRoot, sources, allowedFilePaths) {
         if (newHashLink) {
           sourceEdits.edit(hashOffset, hashOffset + hash.length, newHashLink);
         } else {
-          messages.push(Message.error(`Bad link in ${source.projectPath()}:${lineNumber + 1}: hash "#${hash}" does not exist in "${path.relative(projectRoot, resolvedPath)}"`));
+          errors.push(`Bad link in ${source.projectPath()}:${lineNumber + 1}: hash "#${hash}" does not exist in "${path.relative(projectRoot, resolvedPath)}"`);
         }
       }
       offset += line.length;
     });
 
-    sourceEdits.commit(messages);
+    sourceEdits.commit(errors);
   }
-  return messages;
+  return errors;
 
   function resolveLinkPath(source, relativePath) {
     if (!relativePath)
@@ -190,19 +189,19 @@ class SourceEdits {
     this._edits.push({from, to, newText});
   }
 
-  commit(messages = []) {
+  commit(errors = []) {
     if (!this._edits.length)
       return;
     this._edits.sort((a, b) => a.from - b.from);
     for (const edit of this._edits) {
       if (edit.from > edit.to) {
-        messages.push(Message.error('INTERNAL ERROR: incorrect edit!'));
+        errors.push('INTERNAL ERROR: incorrect edit!');
         return;
       }
     }
     for (let i = 0; i < this._edits.length - 1; ++i) {
       if (this._edits[i].to > this._edits[i + 1].from) {
-        messages.push(Message.error('INTERNAL ERROR: edits are overlapping!'));
+        errors.push('INTERNAL ERROR: edits are overlapping!');
         return;
       }
     }
diff --git a/utils/doclint/check_public_api/test/testMissingDocs.js b/utils/doclint/test/missingDocs.spec.js
similarity index 87%
rename from utils/doclint/check_public_api/test/testMissingDocs.js
rename to utils/doclint/test/missingDocs.spec.js
index e4c8ac90b7..e4a1fe706f 100644
--- a/utils/doclint/check_public_api/test/testMissingDocs.js
+++ b/utils/doclint/test/missingDocs.spec.js
@@ -18,9 +18,9 @@
 const fs = require('fs');
 const path = require('path');
 const missingDocs = require('../missingDocs');
-const Source = require('../../Source');
+const Source = require('../Source');
 const { folio } = require('folio');
-const { parseMd } = require('../../../parse_md');
+const { parseMd } = require('../../parse_md');
 
 const { test, expect } = folio;
 
@@ -30,8 +30,7 @@ test('missing docs', async ({}) => {
     await Source.readFile(path.join(__dirname, 'test-api.ts')),
     await Source.readFile(path.join(__dirname, 'test-api-class.ts')),
   ];
-  const messages = missingDocs(api, tsSources, path.join(__dirname, 'test-api.ts'));
-  const errors = messages.map(message => message.text);
+  const errors = missingDocs(api, tsSources, path.join(__dirname, 'test-api.ts'));
   expect(errors).toEqual([
     'Missing documentation for "Exists.exists2.extra"',
     'Missing documentation for "Exists.exists2.options"',
diff --git a/utils/doclint/preprocessor/test.js b/utils/doclint/test/preprocessor.spec.js
similarity index 80%
rename from utils/doclint/preprocessor/test.js
rename to utils/doclint/test/preprocessor.spec.js
index a4a8eac55d..51e7ed1d80 100644
--- a/utils/doclint/preprocessor/test.js
+++ b/utils/doclint/test/preprocessor.spec.js
@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-const {runCommands} = require('.');
+const {runCommands} = require('../preprocessor');
 const Source = require('../Source');
 const { folio } = require('folio');
 const { describe, it, expect } = folio;
@@ -34,19 +34,18 @@ describe('runCommands', function() {
     const source = new Source('doc.md', `
       <!-- gen:unknown-command -->something<!-- gen:stop -->
     `);
-    const messages = runCommands([source], OPTIONS_REL);
+    const errors = runCommands([source], OPTIONS_REL);
     expect(source.hasUpdatedText()).toBe(false);
-    expect(messages.length).toBe(1);
-    expect(messages[0].type).toBe('error');
-    expect(messages[0].text).toContain('Unknown command');
+    expect(errors.length).toBe(1);
+    expect(errors[0]).toContain('Unknown command');
   });
   describe('gen:version', function() {
     it('should work', function() {
       const source = new Source('doc.md', `
         Playwright <!-- gen:version -->XXX<!-- gen:stop -->
       `);
-      const messages = runCommands([source], OPTIONS_REL);
-      expect(messages.length).toBe(0);
+      const errors = runCommands([source], OPTIONS_REL);
+      expect(errors.length).toBe(0);
       expect(source.hasUpdatedText()).toBe(true);
       expect(source.text()).toBe(`
         Playwright <!-- gen:version -->v1.3.0<!-- gen:stop -->
@@ -56,8 +55,8 @@ describe('runCommands', function() {
       const source = new Source('doc.md', `
         Playwright <!-- gen:version -->XXX<!-- gen:stop -->
       `);
-      const messages = runCommands([source], OPTIONS_DEV);
-      expect(messages.length).toBe(0);
+      const errors = runCommands([source], OPTIONS_DEV);
+      expect(errors.length).toBe(0);
       expect(source.hasUpdatedText()).toBe(true);
       expect(source.text()).toBe(`
         Playwright <!-- gen:version -->Tip-Of-Tree<!-- gen:stop -->
@@ -71,11 +70,10 @@ describe('runCommands', function() {
     });
     it('should not tolerate missing gen:stop', function() {
       const source = new Source('doc.md', `<!--GEN:version-->`);
-      const messages = runCommands([source], OPTIONS_REL);
+      const errors = runCommands([source], OPTIONS_REL);
       expect(source.hasUpdatedText()).toBe(false);
-      expect(messages.length).toBe(1);
-      expect(messages[0].type).toBe('error');
-      expect(messages[0].text).toContain(`Failed to find 'gen:stop'`);
+      expect(errors.length).toBe(1);
+      expect(errors[0]).toContain(`Failed to find 'gen:stop'`);
     });
   });
   describe('gen:toc', function() {
@@ -84,8 +82,8 @@ describe('runCommands', function() {
         ### class: page
         #### page.$
         #### page.$$`);
-      const messages = runCommands([source], OPTIONS_REL);
-      expect(messages.length).toBe(0);
+      const errors = runCommands([source], OPTIONS_REL);
+      expect(errors.length).toBe(0);
       expect(source.hasUpdatedText()).toBe(true);
       expect(source.text()).toBe(`<!-- gen:toc -->
 - [class: page](#class-page)
@@ -104,8 +102,8 @@ describe('runCommands', function() {
         # yo comment
         \`\`\`
       `);
-      const messages = runCommands([source], OPTIONS_REL);
-      expect(messages.length).toBe(0);
+      const errors = runCommands([source], OPTIONS_REL);
+      expect(errors.length).toBe(0);
       expect(source.hasUpdatedText()).toBe(true);
       expect(source.text()).toBe(`<!-- gen:toc -->
 - [class: page](#class-page)
@@ -121,8 +119,8 @@ describe('runCommands', function() {
       const source = new Source('doc.md', `<!-- gen:toc -->XXX<!-- gen:stop -->
         ### some [link](#foobar) here
       `);
-      const messages = runCommands([source], OPTIONS_REL);
-      expect(messages.length).toBe(0);
+      const errors = runCommands([source], OPTIONS_REL);
+      expect(errors.length).toBe(0);
       expect(source.hasUpdatedText()).toBe(true);
       expect(source.text()).toBe(`<!-- gen:toc -->
 - [some link here](#some-link-here)
@@ -139,8 +137,8 @@ describe('runCommands', function() {
         #### first.2.1
         ## Second
       `);
-      const messages = runCommands([source], OPTIONS_REL);
-      expect(messages.length).toBe(0);
+      const errors = runCommands([source], OPTIONS_REL);
+      expect(errors.length).toBe(0);
       expect(source.hasUpdatedText()).toBe(true);
       expect(source.text()).toBe(`
         ## First
@@ -161,8 +159,8 @@ describe('runCommands', function() {
       <!-- gen:version -->xxx<!-- gen:stop -->
       <!-- gen:version -->zzz<!-- gen:stop -->
     `);
-    const messages = runCommands([source], OPTIONS_REL);
-    expect(messages.length).toBe(0);
+    const errors = runCommands([source], OPTIONS_REL);
+    expect(errors.length).toBe(0);
     expect(source.hasUpdatedText()).toBe(true);
     expect(source.text()).toBe(`
       <!-- gen:version -->v1.3.0<!-- gen:stop -->
@@ -174,8 +172,8 @@ describe('runCommands', function() {
       const source = new Source('doc.md', `
         Playwright <!-- gen:chromium-version -->XXX<!-- gen:stop -->
       `);
-      const messages = runCommands([source], OPTIONS_REL);
-      expect(messages.length).toBe(0);
+      const errors = runCommands([source], OPTIONS_REL);
+      expect(errors.length).toBe(0);
       expect(source.hasUpdatedText()).toBe(true);
       expect(source.text()).toBe(`
         Playwright <!-- gen:chromium-version -->80.0.4004.0<!-- gen:stop -->
@@ -187,8 +185,8 @@ describe('runCommands', function() {
       const source = new Source('doc.md', `
         Playwright <!-- gen:firefox-version -->XXX<!-- gen:stop -->
       `);
-      const messages = runCommands([source], OPTIONS_REL);
-      expect(messages.length).toBe(0);
+      const errors = runCommands([source], OPTIONS_REL);
+      expect(errors.length).toBe(0);
       expect(source.hasUpdatedText()).toBe(true);
       expect(source.text()).toBe(`
         Playwright <!-- gen:firefox-version -->73.0b3<!-- gen:stop -->
diff --git a/utils/doclint/check_public_api/test/test-api-class.ts b/utils/doclint/test/test-api-class.ts
similarity index 100%
rename from utils/doclint/check_public_api/test/test-api-class.ts
rename to utils/doclint/test/test-api-class.ts
diff --git a/utils/doclint/check_public_api/test/test-api.md b/utils/doclint/test/test-api.md
similarity index 100%
rename from utils/doclint/check_public_api/test/test-api.md
rename to utils/doclint/test/test-api.md
diff --git a/utils/doclint/check_public_api/test/test-api.ts b/utils/doclint/test/test-api.ts
similarity index 100%
rename from utils/doclint/check_public_api/test/test-api.ts
rename to utils/doclint/test/test-api.ts
diff --git a/utils/generate_types/index.js b/utils/generate_types/index.js
index 2e71c06841..8cdfa5c501 100644
--- a/utils/generate_types/index.js
+++ b/utils/generate_types/index.js
@@ -17,7 +17,7 @@
 //@ts-check
 const path = require('path');
 const {devices} = require('../..');
-const Documentation = require('../doclint/check_public_api/Documentation');
+const Documentation = require('../doclint/Documentation');
 const PROJECT_DIR = path.join(__dirname, '..', '..');
 const fs = require('fs');
 const {parseOverrides} = require('./parseOverrides');
@@ -39,7 +39,7 @@ let hadChanges = false;
   const apiBody = parseMd(fs.readFileSync(path.join(PROJECT_DIR, 'docs-src', 'api-body.md')).toString());
   const apiParams = parseMd(fs.readFileSync(path.join(PROJECT_DIR, 'docs-src', 'api-params.md')).toString());
   const api = applyTemplates(apiBody, apiParams);
-  const mdResult = require('../doclint/check_public_api/MDBuilder')(api, true);
+  const mdResult = require('../doclint/MDBuilder')(api, true);
   documentation = mdResult.documentation;
 
   // Root module types are overridden.