diff --git a/.eslintrc.js b/.eslintrc.js
index 4bd19eefb185..a33a48a20aa4 100644
--- a/.eslintrc.js
+++ b/.eslintrc.js
@@ -288,6 +288,12 @@ const base = {
   // forbid useless path segments
   'import/no-useless-path-segments': 'error',
 
+  // node:
+  // enforce the style of file extensions in `import` declarations
+  'node/file-extension-in-import': ['error', 'never'],
+  // disallow the assignment to `exports`
+  'node/no-exports-assign': 'error',
+
   // es6:
   // require parentheses around arrow function arguments
   'arrow-parens': ['error', 'as-needed'],
@@ -412,6 +418,15 @@ const es3 = {
   'prefer-destructuring': 'off',
 };
 
+const node = {
+  // disallow deprecated APIs
+  'node/no-deprecated-api': 'error',
+  // disallow unsupported ECMAScript built-ins on the specified version
+  'node/no-unsupported-features/es-builtins': ['error', { version: '>=8.0.0' }],
+  // disallow unsupported ECMAScript syntax on the specified version
+  'node/no-unsupported-features/es-syntax': ['error', { version: '>=8.0.0' }],
+};
+
 const tests = {
   // require strict mode directives
   strict: 'off',
@@ -497,7 +512,7 @@ const qunit = {
 module.exports = {
   root: true,
   parserOptions: {
-    ecmaVersion: 2019,
+    ecmaVersion: 2020,
   },
   env: {
     browser: true,
@@ -506,6 +521,7 @@ module.exports = {
   },
   plugins: [
     'import',
+    'node',
     'optimize-regex',
     'qunit',
     'sonarjs',
@@ -561,9 +577,21 @@ module.exports = {
       files: [
         'packages/core-js-builder/**',
         'packages/core-js-compat/**',
+        'tests/commonjs.js',
+        '.eslintrc.js',
+        '.webpack.config.js',
+        'babel.config.js',
+        'Gruntfile.js',
+      ],
+      env: {
+        es6: true,
+      },
+      rules: node,
+    },
+    {
+      files: [
         'tests/tests/**',
         'tests/compat/**',
-        'tests/commonjs.js',
       ],
       env: {
         es6: true,
diff --git a/package.json b/package.json
index 36d5e5813706..d8c78004b047 100644
--- a/package.json
+++ b/package.json
@@ -24,6 +24,7 @@
     "eslint": "^6.3.0",
     "eslint-import-resolver-webpack": "^0.11.1",
     "eslint-plugin-import": "^2.18.2",
+    "eslint-plugin-node": "^10.0.0",
     "eslint-plugin-optimize-regex": "^1.1.6",
     "eslint-plugin-qunit": "^4.0.0",
     "eslint-plugin-sonarjs": "^0.4.0",
diff --git a/packages/core-js-compat/src/build-modules-by-versions.js b/packages/core-js-compat/src/build-modules-by-versions.js
index f1813c24b67c..2ec940e3c591 100644
--- a/packages/core-js-compat/src/build-modules-by-versions.js
+++ b/packages/core-js-compat/src/build-modules-by-versions.js
@@ -10,7 +10,6 @@ for (const version of Object.values(modulesByVersions)) {
   for (const module of version) modules.delete(module);
 }
 
-writeFileSync(resolve(__dirname, '../modules-by-versions.json'), JSON.stringify({
+writeFileSync(resolve(__dirname, '../modules-by-versions.json'), JSON.stringify(Object.assign({
   '3.0': [...modules],
-  ...modulesByVersions,
-}, null, '  '));
+}, modulesByVersions), null, '  '));
diff --git a/packages/core-js/internals/array-buffer.js b/packages/core-js/internals/array-buffer.js
index d2d33fdcdd16..560d5304380d 100644
--- a/packages/core-js/internals/array-buffer.js
+++ b/packages/core-js/internals/array-buffer.js
@@ -291,5 +291,8 @@ if (!NATIVE_ARRAY_BUFFER) {
 
 setToStringTag($ArrayBuffer, ARRAY_BUFFER);
 setToStringTag($DataView, DATA_VIEW);
-exports[ARRAY_BUFFER] = $ArrayBuffer;
-exports[DATA_VIEW] = $DataView;
+
+module.exports = {
+  ArrayBuffer: $ArrayBuffer,
+  DataView: $DataView
+};
diff --git a/packages/core-js/internals/global.js b/packages/core-js/internals/global.js
index bb744f126f06..cf00638f1a81 100644
--- a/packages/core-js/internals/global.js
+++ b/packages/core-js/internals/global.js
@@ -1,4 +1,3 @@
-var O = 'object';
 var check = function (it) {
   return it && it.Math == Math && it;
 };
@@ -6,9 +5,9 @@ var check = function (it) {
 // https://github.com/zloirock/core-js/issues/86#issuecomment-115759028
 module.exports =
   // eslint-disable-next-line no-undef
-  check(typeof globalThis == O && globalThis) ||
-  check(typeof window == O && window) ||
-  check(typeof self == O && self) ||
-  check(typeof global == O && global) ||
+  check(typeof globalThis == 'object' && globalThis) ||
+  check(typeof window == 'object' && window) ||
+  check(typeof self == 'object' && self) ||
+  check(typeof global == 'object' && global) ||
   // eslint-disable-next-line no-new-func
   Function('return this')();
diff --git a/tests/promises-aplus-native.html b/tests/promises-aplus-native.html
index 0d0a5312d45b..73910238514b 100644
--- a/tests/promises-aplus-native.html
+++ b/tests/promises-aplus-native.html
@@ -1,32 +1,32 @@
 <!DOCTYPE html>
 <html>
 <head>
-    <meta charset="utf-8" />
-    <title>Promises/A+ Tests, Against Your Browser!</title>
-    <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/mocha/2.1.0/mocha.css" />
+  <meta charset="utf-8" />
+  <title>Promises/A+ Tests, Against Your Browser!</title>
+  <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/mocha/2.1.0/mocha.css" />
 </head>
 <body>
-    <div id="mocha"></div>
-    <script src="https://cdnjs.cloudflare.com/ajax/libs/mocha/2.1.0/mocha.min.js"></script>
-    <script>
-        mocha.setup({ ui: "bdd", timeout: 1e3, slow: Infinity });
+  <div id="mocha"></div>
+  <script src="https://cdnjs.cloudflare.com/ajax/libs/mocha/2.1.0/mocha.min.js"></script>
+  <script>
+    mocha.setup({ ui: "bdd", timeout: 1e3, slow: Infinity });
 
-        window.adapter = {
-            deferred: function () {
-                var deferred = {};
-                deferred.promise = new Promise(function (resolve, reject) {
-                    deferred.resolve = resolve;
-                    deferred.reject = reject;
-                });
-                return deferred;
-            },
-            resolved: Promise.resolve.bind(Promise),
-            rejected: Promise.reject.bind(Promise)
-        };
-    </script>
-    <script src="bundles/promises-aplus.js"></script>
-    <script>
-        mocha.run();
-    </script>
+    window.adapter = {
+      deferred: function () {
+        var deferred = {};
+        deferred.promise = new Promise(function (resolve, reject) {
+          deferred.resolve = resolve;
+          deferred.reject = reject;
+        });
+        return deferred;
+      },
+      resolved: Promise.resolve.bind(Promise),
+      rejected: Promise.reject.bind(Promise)
+    };
+  </script>
+  <script src="bundles/promises-aplus.js"></script>
+  <script>
+    mocha.run();
+  </script>
 </body>
 </html>
diff --git a/tests/promises-aplus.html b/tests/promises-aplus.html
index 7b5a18bac7d6..31a612c1fb6f 100644
--- a/tests/promises-aplus.html
+++ b/tests/promises-aplus.html
@@ -1,33 +1,33 @@
 <!DOCTYPE html>
 <html>
 <head>
-    <meta charset="utf-8" />
-    <title>Promises/A+ Tests, Against Your Browser!</title>
-    <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/mocha/2.1.0/mocha.css" />
+  <meta charset="utf-8" />
+  <title>Promises/A+ Tests, Against Your Browser!</title>
+  <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/mocha/2.1.0/mocha.css" />
 </head>
 <body>
-    <div id="mocha"></div>
-    <script src="../packages/core-js-bundle/index.js"></script>
-    <script src="https://cdnjs.cloudflare.com/ajax/libs/mocha/2.1.0/mocha.min.js"></script>
-    <script>
-        mocha.setup({ ui: "bdd", timeout: 1e3, slow: Infinity });
+  <div id="mocha"></div>
+  <script src="../packages/core-js-bundle/index.js"></script>
+  <script src="https://cdnjs.cloudflare.com/ajax/libs/mocha/2.1.0/mocha.min.js"></script>
+  <script>
+    mocha.setup({ ui: "bdd", timeout: 1e3, slow: Infinity });
 
-        window.adapter = {
-            deferred: function () {
-                var deferred = {};
-                deferred.promise = new Promise(function (resolve, reject) {
-                    deferred.resolve = resolve;
-                    deferred.reject = reject;
-                });
-                return deferred;
-            },
-            resolved: Promise.resolve.bind(Promise),
-            rejected: Promise.reject.bind(Promise)
-        };
-    </script>
-    <script src="bundles/promises-aplus.js"></script>
-    <script>
-        mocha.run();
-    </script>
+    window.adapter = {
+      deferred: function () {
+        var deferred = {};
+        deferred.promise = new Promise(function (resolve, reject) {
+          deferred.resolve = resolve;
+          deferred.reject = reject;
+        });
+        return deferred;
+      },
+      resolved: Promise.resolve.bind(Promise),
+      rejected: Promise.reject.bind(Promise)
+    };
+  </script>
+  <script src="bundles/promises-aplus.js"></script>
+  <script>
+    mocha.run();
+  </script>
 </body>
 </html>