diff --git a/lib/.eslintrc.yaml b/lib/.eslintrc.yaml
index aaebadca125814..437aa575645ad6 100644
--- a/lib/.eslintrc.yaml
+++ b/lib/.eslintrc.yaml
@@ -1,4 +1,6 @@
 rules:
+  dot-notation: error
+
   # Custom rules in tools/eslint-rules
   require-buffer: error
   buffer-constructor: error
diff --git a/lib/inspector.js b/lib/inspector.js
index 5aacdde26bfc29..9f45f4797e6957 100644
--- a/lib/inspector.js
+++ b/lib/inspector.js
@@ -68,7 +68,7 @@ class Session extends EventEmitter {
     const id = this[nextIdSymbol]++;
     const message = { id, method };
     if (params) {
-      message['params'] = params;
+      message.params = params;
     }
     if (callback) {
       this[messageCallbacksSymbol].set(id, callback);
diff --git a/lib/internal/util.js b/lib/internal/util.js
index c507c493d1ee3a..8fc040d06714dc 100644
--- a/lib/internal/util.js
+++ b/lib/internal/util.js
@@ -6,8 +6,8 @@ const { signals } = process.binding('constants').os;
 
 const { createPromise, promiseResolve, promiseReject } = binding;
 
-const kArrowMessagePrivateSymbolIndex = binding['arrow_message_private_symbol'];
-const kDecoratedPrivateSymbolIndex = binding['decorated_private_symbol'];
+const kArrowMessagePrivateSymbolIndex = binding.arrow_message_private_symbol;
+const kDecoratedPrivateSymbolIndex = binding.decorated_private_symbol;
 const noCrypto = !process.versions.openssl;
 
 const experimentalWarnings = new Set();
diff --git a/lib/module.js b/lib/module.js
index c96d5d51678494..ed9d1a78d476a1 100644
--- a/lib/module.js
+++ b/lib/module.js
@@ -721,7 +721,7 @@ Module._initPaths = function() {
     paths.unshift(path.resolve(homeDir, '.node_modules'));
   }
 
-  var nodePath = process.env['NODE_PATH'];
+  var nodePath = process.env.NODE_PATH;
   if (nodePath) {
     paths = nodePath.split(path.delimiter).filter(function(path) {
       return !!path;