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 091e0e5fc9b0b1..5206024f7b9fe7 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/module.js b/lib/module.js
index 4c4ceaf847fba2..4e41422b58510d 100644
--- a/lib/module.js
+++ b/lib/module.js
@@ -729,7 +729,7 @@ 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;