diff --git a/.github/workflows/tests_secondary.yml b/.github/workflows/tests_secondary.yml
index 872501286a..7f844dd109 100644
--- a/.github/workflows/tests_secondary.yml
+++ b/.github/workflows/tests_secondary.yml
@@ -115,6 +115,7 @@ jobs:
       fail-fast: false
       matrix:
         node_version:
+        - "12.0.0"
         - "^12.0.0"
         - "^14.1.0"  # pre 14.1, zip extraction was broken (https://github.com/microsoft/playwright/issues/1988)
         - "^16.0.0"
diff --git a/install-from-github.js b/install-from-github.js
index 016abee36c..ca19654d37 100644
--- a/install-from-github.js
+++ b/install-from-github.js
@@ -31,7 +31,7 @@ try {
 }
 
 console.log(`Downloading browsers...`);
-const { installDefaultBrowsersForNpmInstall } = require('playwright-core/src/utils/registry');
+const { installDefaultBrowsersForNpmInstall } = require('playwright-core/lib/utils/registry');
 installDefaultBrowsersForNpmInstall().catch(e => {
   console.error(`Failed to install browsers, caused by\n${e.stack}`);
   process.exit(1);
diff --git a/packages/playwright-chromium/install.js b/packages/playwright-chromium/install.js
index 94adb285e9..7bfb93fa07 100644
--- a/packages/playwright-chromium/install.js
+++ b/packages/playwright-chromium/install.js
@@ -14,6 +14,6 @@
  * limitations under the License.
  */
 
-const { installBrowsersForNpmInstall } = require('playwright-core/src/utils/registry');
+const { installBrowsersForNpmInstall } = require('playwright-core/lib/utils/registry');
 
 installBrowsersForNpmInstall(['chromium', 'ffmpeg']);
diff --git a/packages/playwright-core/package.json b/packages/playwright-core/package.json
index 93f34da9c2..36eb568f71 100644
--- a/packages/playwright-core/package.json
+++ b/packages/playwright-core/package.json
@@ -20,15 +20,15 @@
       "require": "./index.js"
     },
     "./cli": "./cli.js",
-    "./src/grid/gridServer": "./lib/grid/gridServer.js",
-    "./src/grid/gridClient": "./lib/grid/gridClient.js",
-    "./src/grid/dockerGridFactory": "./lib/grid/dockerGridFactory.js",
-    "./src/utils/async": "./lib/utils/async.js",
-    "./src/utils/httpServer": "./lib/utils/httpServer.js",
-    "./src/utils/multimap": "./lib/utils/multimap.js",
-    "./src/utils/processLauncher": "./lib/utils/processLauncher.js",
-    "./src/utils/registry": "./lib/utils/registry.js",
-    "./src/utils/utils": "./lib/utils/utils.js"
+    "./lib/grid/gridServer": "./lib/grid/gridServer.js",
+    "./lib/grid/gridClient": "./lib/grid/gridClient.js",
+    "./lib/grid/dockerGridFactory": "./lib/grid/dockerGridFactory.js",
+    "./lib/utils/async": "./lib/utils/async.js",
+    "./lib/utils/httpServer": "./lib/utils/httpServer.js",
+    "./lib/utils/multimap": "./lib/utils/multimap.js",
+    "./lib/utils/processLauncher": "./lib/utils/processLauncher.js",
+    "./lib/utils/registry": "./lib/utils/registry.js",
+    "./lib/utils/utils": "./lib/utils/utils.js"
   },
   "types": "types/types.d.ts",
   "bin": {
diff --git a/packages/playwright-firefox/install.js b/packages/playwright-firefox/install.js
index e3a078871e..a59fe86db0 100644
--- a/packages/playwright-firefox/install.js
+++ b/packages/playwright-firefox/install.js
@@ -14,6 +14,6 @@
  * limitations under the License.
  */
 
-const { installBrowsersForNpmInstall } = require('playwright-core/src/utils/registry');
+const { installBrowsersForNpmInstall } = require('playwright-core/lib/utils/registry');
 
 installBrowsersForNpmInstall(['firefox']);
diff --git a/packages/playwright-test/src/cli.ts b/packages/playwright-test/src/cli.ts
index f4d6c69fba..68f4cb5001 100644
--- a/packages/playwright-test/src/cli.ts
+++ b/packages/playwright-test/src/cli.ts
@@ -25,9 +25,9 @@ import { stopProfiling, startProfiling } from './profiler';
 import { FilePatternFilter } from './util';
 import { Loader } from './loader';
 import { showHTMLReport } from './reporters/html';
-import { GridServer } from 'playwright-core/src/grid/gridServer';
-import dockerFactory from 'playwright-core/src/grid/dockerGridFactory';
-import { createGuid } from 'playwright-core/src/utils/utils';
+import { GridServer } from 'playwright-core/lib/grid/gridServer';
+import dockerFactory from 'playwright-core/lib/grid/dockerGridFactory';
+import { createGuid } from 'playwright-core/lib/utils/utils';
 
 const defaultTimeout = 30000;
 const defaultReporter: BuiltInReporter = process.env.CI ? 'dot' : 'list';
diff --git a/packages/playwright-test/src/dispatcher.ts b/packages/playwright-test/src/dispatcher.ts
index f88779b6f8..3d4c6efec4 100644
--- a/packages/playwright-test/src/dispatcher.ts
+++ b/packages/playwright-test/src/dispatcher.ts
@@ -21,7 +21,7 @@ import { RunPayload, TestBeginPayload, TestEndPayload, DonePayload, TestOutputPa
 import type { TestResult, Reporter, TestStep } from '../types/testReporter';
 import { Suite, TestCase } from './test';
 import { Loader } from './loader';
-import { ManualPromise } from 'playwright-core/src/utils/async';
+import { ManualPromise } from 'playwright-core/lib/utils/async';
 
 export type TestGroup = {
   workerHash: string;
diff --git a/packages/playwright-test/src/index.ts b/packages/playwright-test/src/index.ts
index 5a4566b55d..48d2c9210d 100644
--- a/packages/playwright-test/src/index.ts
+++ b/packages/playwright-test/src/index.ts
@@ -19,8 +19,8 @@ import * as path from 'path';
 import type { LaunchOptions, BrowserContextOptions, Page, BrowserContext, BrowserType } from 'playwright-core';
 import type { TestType, PlaywrightTestArgs, PlaywrightTestOptions, PlaywrightWorkerArgs, PlaywrightWorkerOptions, TestInfo } from '../types/test';
 import { rootTestType } from './testType';
-import { assert, createGuid, removeFolders } from 'playwright-core/src/utils/utils';
-import { GridClient } from 'playwright-core/src/grid/gridClient';
+import { assert, createGuid, removeFolders } from 'playwright-core/lib/utils/utils';
+import { GridClient } from 'playwright-core/lib/grid/gridClient';
 import { Browser } from 'playwright-core';
 export { expect } from './expect';
 export const _baseTest: TestType<{}, {}> = rootTestType.test;
diff --git a/packages/playwright-test/src/loader.ts b/packages/playwright-test/src/loader.ts
index d442fa61a7..7ee45cac46 100644
--- a/packages/playwright-test/src/loader.ts
+++ b/packages/playwright-test/src/loader.ts
@@ -26,7 +26,7 @@ import * as fs from 'fs';
 import { ProjectImpl } from './project';
 import { Reporter } from '../types/testReporter';
 import { BuiltInReporter, builtInReporters } from './runner';
-import { isRegExp } from 'playwright-core/src/utils/utils';
+import { isRegExp } from 'playwright-core/lib/utils/utils';
 
 export class Loader {
   private _defaultConfig: Config;
diff --git a/packages/playwright-test/src/matchers/matchers.ts b/packages/playwright-test/src/matchers/matchers.ts
index e86682e152..2fdd9c6fb1 100644
--- a/packages/playwright-test/src/matchers/matchers.ts
+++ b/packages/playwright-test/src/matchers/matchers.ts
@@ -15,8 +15,8 @@
  */
 
 import { Locator, Page } from 'playwright-core';
-import { FrameExpectOptions } from 'playwright-core/src/client/types';
-import { constructURLBasedOnBaseURL } from 'playwright-core/src/utils/utils';
+import { FrameExpectOptions } from 'playwright-core/lib/client/types';
+import { constructURLBasedOnBaseURL } from 'playwright-core/lib/utils/utils';
 import type { Expect } from '../types';
 import { toBeTruthy } from './toBeTruthy';
 import { toEqual } from './toEqual';
diff --git a/packages/playwright-test/src/matchers/toMatchText.ts b/packages/playwright-test/src/matchers/toMatchText.ts
index c2139256d8..31a1ff2af8 100644
--- a/packages/playwright-test/src/matchers/toMatchText.ts
+++ b/packages/playwright-test/src/matchers/toMatchText.ts
@@ -16,8 +16,8 @@
 
 
 import colors from 'colors/safe';
-import { ExpectedTextValue } from 'playwright-core/src/protocol/channels';
-import { isRegExp, isString } from 'playwright-core/src/utils/utils';
+import { ExpectedTextValue } from 'playwright-core/lib/protocol/channels';
+import { isRegExp, isString } from 'playwright-core/lib/utils/utils';
 import { currentTestInfo } from '../globals';
 import type { Expect } from '../types';
 import { expectType } from '../util';
diff --git a/packages/playwright-test/src/reporters/html.ts b/packages/playwright-test/src/reporters/html.ts
index 7337fc89ca..32b55e4a63 100644
--- a/packages/playwright-test/src/reporters/html.ts
+++ b/packages/playwright-test/src/reporters/html.ts
@@ -19,8 +19,8 @@ import fs from 'fs';
 import open from 'open';
 import path from 'path';
 import { FullConfig, Suite } from '../../types/testReporter';
-import { HttpServer } from 'playwright-core/src/utils/httpServer';
-import { calculateSha1, removeFolders } from 'playwright-core/src/utils/utils';
+import { HttpServer } from 'playwright-core/lib/utils/httpServer';
+import { calculateSha1, removeFolders } from 'playwright-core/lib/utils/utils';
 import RawReporter, { JsonReport, JsonSuite, JsonTestCase, JsonTestResult, JsonTestStep, JsonAttachment } from './raw';
 import assert from 'assert';
 
diff --git a/packages/playwright-test/src/reporters/raw.ts b/packages/playwright-test/src/reporters/raw.ts
index 0842b126e8..da303f9cba 100644
--- a/packages/playwright-test/src/reporters/raw.ts
+++ b/packages/playwright-test/src/reporters/raw.ts
@@ -17,11 +17,11 @@
 import fs from 'fs';
 import path from 'path';
 import { FullConfig, Location, Suite, TestCase, TestResult, TestStatus, TestStep } from '../../types/testReporter';
-import { assert, calculateSha1 } from 'playwright-core/src/utils/utils';
+import { assert, calculateSha1 } from 'playwright-core/lib/utils/utils';
 import { sanitizeForFilePath } from '../util';
 import { formatResultFailure } from './base';
 import { toPosixPath, serializePatterns } from './json';
-import { MultiMap } from 'playwright-core/src/utils/multimap';
+import { MultiMap } from 'playwright-core/lib/utils/multimap';
 import { codeFrameColumns } from '@babel/code-frame';
 
 export type JsonLocation = Location;
diff --git a/packages/playwright-test/src/runner.ts b/packages/playwright-test/src/runner.ts
index eacf7d1698..0d6974d5a9 100644
--- a/packages/playwright-test/src/runner.ts
+++ b/packages/playwright-test/src/runner.ts
@@ -38,7 +38,7 @@ import { ProjectImpl } from './project';
 import { Minimatch } from 'minimatch';
 import { FullConfig } from './types';
 import { WebServer } from './webServer';
-import { raceAgainstDeadline } from 'playwright-core/src/utils/async';
+import { raceAgainstDeadline } from 'playwright-core/lib/utils/async';
 
 const removeFolderAsync = promisify(rimraf);
 const readDirAsync = promisify(fs.readdir);
diff --git a/packages/playwright-test/src/util.ts b/packages/playwright-test/src/util.ts
index d2638db60b..b1a8ae43fb 100644
--- a/packages/playwright-test/src/util.ts
+++ b/packages/playwright-test/src/util.ts
@@ -20,7 +20,7 @@ import url from 'url';
 import type { TestError, Location } from './types';
 import { default as minimatch } from 'minimatch';
 import debug from 'debug';
-import { isRegExp } from 'playwright-core/src/utils/utils';
+import { isRegExp } from 'playwright-core/lib/utils/utils';
 
 export function serializeError(error: Error | any): TestError {
   if (error instanceof Error) {
diff --git a/packages/playwright-test/src/webServer.ts b/packages/playwright-test/src/webServer.ts
index caeebefe09..bdd1d723a1 100644
--- a/packages/playwright-test/src/webServer.ts
+++ b/packages/playwright-test/src/webServer.ts
@@ -18,9 +18,9 @@ import net from 'net';
 import os from 'os';
 import stream from 'stream';
 import { monotonicTime } from './util';
-import { raceAgainstDeadline } from 'playwright-core/src/utils/async';
+import { raceAgainstDeadline } from 'playwright-core/lib/utils/async';
 import { WebServerConfig } from './types';
-import { launchProcess } from 'playwright-core/src/utils/processLauncher';
+import { launchProcess } from 'playwright-core/lib/utils/processLauncher';
 
 const DEFAULT_ENVIRONMENT_VARIABLES = {
   'BROWSER': 'none', // Disable that create-react-app will open the page in the browser
diff --git a/packages/playwright-test/src/workerRunner.ts b/packages/playwright-test/src/workerRunner.ts
index b7344dc2b7..47c3af4218 100644
--- a/packages/playwright-test/src/workerRunner.ts
+++ b/packages/playwright-test/src/workerRunner.ts
@@ -28,7 +28,7 @@ import { Modifier, Suite, TestCase } from './test';
 import { Annotations, TestError, TestInfo, TestInfoImpl, TestStepInternal, WorkerInfo } from './types';
 import { ProjectImpl } from './project';
 import { FixturePool, FixtureRunner } from './fixtures';
-import { DeadlineRunner, raceAgainstDeadline } from 'playwright-core/src/utils/async';
+import { DeadlineRunner, raceAgainstDeadline } from 'playwright-core/lib/utils/async';
 
 const removeFolderAsync = util.promisify(rimraf);
 
diff --git a/packages/playwright-webkit/install.js b/packages/playwright-webkit/install.js
index 6228abc708..5340ee1776 100644
--- a/packages/playwright-webkit/install.js
+++ b/packages/playwright-webkit/install.js
@@ -14,6 +14,6 @@
  * limitations under the License.
  */
 
-const { installBrowsersForNpmInstall } = require('playwright-core/src/utils/registry');
+const { installBrowsersForNpmInstall } = require('playwright-core/lib/utils/registry');
 
 installBrowsersForNpmInstall(['webkit']);
diff --git a/packages/playwright/install.js b/packages/playwright/install.js
index 68c9a8c1db..eb7b13a93d 100644
--- a/packages/playwright/install.js
+++ b/packages/playwright/install.js
@@ -14,6 +14,6 @@
  * limitations under the License.
  */
 
-const { installDefaultBrowsersForNpmInstall } = require('playwright-core/src/utils/registry');
+const { installDefaultBrowsersForNpmInstall } = require('playwright-core/lib/utils/registry');
 
 installDefaultBrowsersForNpmInstall();
diff --git a/tests/browsertype-connect.spec.ts b/tests/browsertype-connect.spec.ts
index a1816c7ea6..40db0bad03 100644
--- a/tests/browsertype-connect.spec.ts
+++ b/tests/browsertype-connect.spec.ts
@@ -18,7 +18,7 @@
 import { playwrightTest as test, expect } from './config/browserTest';
 import fs from 'fs';
 import * as path from 'path';
-import { getUserAgent } from 'playwright-core/src/utils/utils';
+import { getUserAgent } from 'playwright-core/lib/utils/utils';
 import WebSocket from 'ws';
 import { suppressCertificateWarning } from './config/utils';
 
diff --git a/tests/chromium/chromium.spec.ts b/tests/chromium/chromium.spec.ts
index 4bad794c90..38d3de592c 100644
--- a/tests/chromium/chromium.spec.ts
+++ b/tests/chromium/chromium.spec.ts
@@ -18,7 +18,7 @@
 import { contextTest as test, expect } from '../config/browserTest';
 import { playwrightTest } from '../config/browserTest';
 import http from 'http';
-import { getUserAgent } from 'playwright-core/src/utils/utils';
+import { getUserAgent } from 'playwright-core/lib/utils/utils';
 import { suppressCertificateWarning } from '../config/utils';
 
 test('should create a worker from a service worker', async ({ page, server }) => {
diff --git a/tests/config/baseTest.ts b/tests/config/baseTest.ts
index fe56bcdafe..5ffe658dce 100644
--- a/tests/config/baseTest.ts
+++ b/tests/config/baseTest.ts
@@ -19,7 +19,7 @@ import * as path from 'path';
 import * as fs from 'fs';
 import { installCoverageHooks } from './coverage';
 import { start } from '../../packages/playwright-core/lib/outofprocess';
-import { GridClient } from 'playwright-core/src/grid/gridClient';
+import { GridClient } from 'playwright-core/lib/grid/gridClient';
 import type { LaunchOptions } from 'playwright-core';
 import { commonFixtures, CommonFixtures, serverFixtures, ServerFixtures, ServerOptions } from './commonFixtures';
 
@@ -91,7 +91,7 @@ const baseFixtures: Fixtures<{}, BaseOptions & BaseFixtures> = {
       service: new ServiceMode(),
       driver: new DriverMode(),
     }[mode];
-    require('playwright-core/src/utils/utils').setUnderTest();
+    require('playwright-core/lib/utils/utils').setUnderTest();
     const playwright = await modeImpl.setup(workerInfo.workerIndex);
     await run(playwright);
     await modeImpl.teardown();
diff --git a/tests/config/browserTest.ts b/tests/config/browserTest.ts
index 9487f8072a..7c6b3f7d37 100644
--- a/tests/config/browserTest.ts
+++ b/tests/config/browserTest.ts
@@ -16,7 +16,7 @@
 
 import type { Fixtures } from '@playwright/test';
 import type { Browser, BrowserContext, BrowserContextOptions, BrowserType, LaunchOptions, Page } from 'playwright-core';
-import { removeFolders } from 'playwright-core/src/utils/utils';
+import { removeFolders } from 'playwright-core/lib/utils/utils';
 import { ReuseBrowserContextStorage } from '@playwright/test/src/index';
 import * as path from 'path';
 import * as fs from 'fs';
@@ -24,7 +24,7 @@ import * as os from 'os';
 import { RemoteServer, RemoteServerOptions } from './remoteServer';
 import { baseTest, CommonWorkerFixtures } from './baseTest';
 import { CommonFixtures } from './commonFixtures';
-import type { ParsedStackTrace } from 'playwright-core/src/utils/stackTrace';
+import type { ParsedStackTrace } from 'playwright-core/lib/utils/stackTrace';
 
 type PlaywrightWorkerOptions = {
   executablePath: LaunchOptions['executablePath'];
diff --git a/tests/global-fetch.spec.ts b/tests/global-fetch.spec.ts
index 70cb6e5116..a2b6999026 100644
--- a/tests/global-fetch.spec.ts
+++ b/tests/global-fetch.spec.ts
@@ -15,7 +15,7 @@
  */
 
 import http from 'http';
-import { getPlaywrightVersion } from 'playwright-core/src/utils/utils';
+import { getPlaywrightVersion } from 'playwright-core/lib/utils/utils';
 import { expect, playwrightTest as it } from './config/browserTest';
 
 it.skip(({ mode }) => mode !== 'default');
diff --git a/tests/har.spec.ts b/tests/har.spec.ts
index f2d5e4eea4..ed79aaee4e 100644
--- a/tests/har.spec.ts
+++ b/tests/har.spec.ts
@@ -21,7 +21,7 @@ import fs from 'fs';
 import http2 from 'http2';
 import type { BrowserContext, BrowserContextOptions } from 'playwright-core';
 import type { AddressInfo } from 'net';
-import type { Log } from 'playwright-core/src/server/supplements/har/har';
+import type { Log } from 'playwright-core/lib/server/supplements/har/har';
 
 async function pageWithHar(contextFactory: (options?: BrowserContextOptions) => Promise<BrowserContext>, testInfo: any, outputPath: string = 'test.har') {
   const harPath = testInfo.outputPath(outputPath);
diff --git a/tests/inspector/inspectorTest.ts b/tests/inspector/inspectorTest.ts
index aa3129eace..81466e0727 100644
--- a/tests/inspector/inspectorTest.ts
+++ b/tests/inspector/inspectorTest.ts
@@ -17,7 +17,7 @@
 import { contextTest } from '../config/browserTest';
 import type { Page } from 'playwright-core';
 import * as path from 'path';
-import type { Source } from 'playwright-core/src/server/supplements/recorder/recorderTypes';
+import type { Source } from 'playwright-core/lib/server/supplements/recorder/recorderTypes';
 import { CommonFixtures, TestChildProcess } from '../config/commonFixtures';
 export { expect } from '@playwright/test';
 
diff --git a/tests/playwright-test/playwright.spec.ts b/tests/playwright-test/playwright.spec.ts
index 9c18d354c1..da41d7d81c 100644
--- a/tests/playwright-test/playwright.spec.ts
+++ b/tests/playwright-test/playwright.spec.ts
@@ -18,7 +18,7 @@ import { test, expect, stripAscii } from './playwright-test-fixtures';
 import fs from 'fs';
 import path from 'path';
 import { spawnSync } from 'child_process';
-import { registry } from 'playwright-core/src/utils/registry';
+import { registry } from 'playwright-core/lib/utils/registry';
 
 const ffmpeg = registry.findExecutable('ffmpeg')!.executablePath();
 
diff --git a/tests/playwright-test/reporter-html.spec.ts b/tests/playwright-test/reporter-html.spec.ts
index 59618af246..ddfef54ffc 100644
--- a/tests/playwright-test/reporter-html.spec.ts
+++ b/tests/playwright-test/reporter-html.spec.ts
@@ -17,7 +17,7 @@
 import fs from 'fs';
 import path from 'path';
 import { test as baseTest, expect } from './playwright-test-fixtures';
-import { HttpServer } from 'playwright-core/src/utils/httpServer';
+import { HttpServer } from 'playwright-core/lib/utils/httpServer';
 
 const test = baseTest.extend<{ showReport: () => Promise<void> }>({
   showReport: async ({ page }, use, testInfo) => {
diff --git a/tests/tsconfig.json b/tests/tsconfig.json
index 47b0c03736..9020456d30 100644
--- a/tests/tsconfig.json
+++ b/tests/tsconfig.json
@@ -9,6 +9,10 @@
         "strictBindCallApply": true,
         "allowSyntheticDefaultImports": true,
         "useUnknownInCatchVariables": false,
+        "baseUrl": ".",
+        "paths": {
+          "playwright-core/lib/*": ["../packages/playwright-core/src/*"]
+        },
     },
     "include": ["**/*.spec.js", "**/*.ts", "index.d.ts"],
     "exclude": ["playwright-test/"]
diff --git a/tests/video.spec.ts b/tests/video.spec.ts
index b044ae653b..bad15239a5 100644
--- a/tests/video.spec.ts
+++ b/tests/video.spec.ts
@@ -19,7 +19,7 @@ import fs from 'fs';
 import path from 'path';
 import { spawnSync } from 'child_process';
 import { PNG } from 'pngjs';
-import { registry } from 'playwright-core/src/utils/registry';
+import { registry } from 'playwright-core/lib/utils/registry';
 
 const ffmpeg = registry.findExecutable('ffmpeg')!.executablePath();
 
diff --git a/tsconfig.json b/tsconfig.json
index 48952702b1..55711e083a 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -5,7 +5,8 @@
     "lib": ["esnext", "dom", "DOM.Iterable"],
     "baseUrl": ".",
     "paths": {
-      "*": ["./packages/*/"]
+      "*": ["./packages/*/"],
+      "playwright-core/lib/*": ["./packages/playwright-core/src/*"]
     },
     "esModuleInterop": true,
     "strict": true,
diff --git a/utils/linux-browser-dependencies/inside_docker/list_dependencies.js b/utils/linux-browser-dependencies/inside_docker/list_dependencies.js
index 96183c298d..bd8fd5bbd9 100644
--- a/utils/linux-browser-dependencies/inside_docker/list_dependencies.js
+++ b/utils/linux-browser-dependencies/inside_docker/list_dependencies.js
@@ -4,7 +4,7 @@ const fs = require('fs');
 const util = require('util');
 const path = require('path');
 const {spawn} = require('child_process');
-const {registryDirectory} = require('playwright-core/src/utils/registry.js');
+const {registryDirectory} = require('playwright-core/lib/utils/registry.js');
 
 const readdirAsync = util.promisify(fs.readdir.bind(fs));
 const readFileAsync = util.promisify(fs.readFile.bind(fs));