diff --git a/rules/.eslintrc b/rules/.eslintrc
index 22abc7fb2b..6c191c19c8 100644
--- a/rules/.eslintrc
+++ b/rules/.eslintrc
@@ -1,5 +1,8 @@
 {
   "env": {
     "es6": true
+  },
+  "rules": {
+    "strict": [2, "global"]
   }
 }
diff --git a/rules/index.js b/rules/index.js
index 2658bc9c98..f625cac35b 100644
--- a/rules/index.js
+++ b/rules/index.js
@@ -1,3 +1,5 @@
+'use strict';
+
 module.exports = {
   rules: {
     'no-duplicate-requires': require('./no-duplicate-requires').rule,
diff --git a/rules/no-duplicate-requires.js b/rules/no-duplicate-requires.js
index 7574572a29..6e7d965bec 100644
--- a/rules/no-duplicate-requires.js
+++ b/rules/no-duplicate-requires.js
@@ -1,3 +1,5 @@
+'use strict';
+
 const util = require('./util');
 
 exports.rule = {
diff --git a/rules/no-unused-requires.js b/rules/no-unused-requires.js
index a5ba7d272c..2436bb4447 100644
--- a/rules/no-unused-requires.js
+++ b/rules/no-unused-requires.js
@@ -1,3 +1,5 @@
+'use strict';
+
 const util = require('./util');
 
 function getName(node) {
diff --git a/rules/requires-first.js b/rules/requires-first.js
index 0641019c52..1031a70887 100644
--- a/rules/requires-first.js
+++ b/rules/requires-first.js
@@ -1,3 +1,5 @@
+'use strict';
+
 const util = require('./util');
 
 exports.rule = {
diff --git a/rules/util.js b/rules/util.js
index 00b3fefbb5..605a5d7a9e 100644
--- a/rules/util.js
+++ b/rules/util.js
@@ -1,3 +1,5 @@
+'use strict';
+
 function isGoogCallExpression(node, name) {
   const callee = node.callee;
   return callee && callee.type === 'MemberExpression' &&
diff --git a/rules/valid-requires.js b/rules/valid-requires.js
index b7f7479df0..e98a4e00aa 100644
--- a/rules/valid-requires.js
+++ b/rules/valid-requires.js
@@ -1,3 +1,5 @@
+'use strict';
+
 const util = require('./util');
 
 exports.rule = {
diff --git a/test/node/.eslintrc b/test/node/.eslintrc
index 60b5f72125..efd65c09ef 100644
--- a/test/node/.eslintrc
+++ b/test/node/.eslintrc
@@ -2,5 +2,8 @@
   "env": {
     "es6": true,
     "mocha": true
+  },
+  "rules": {
+    "strict": [2, "global"]
   }
 }
diff --git a/test/node/one-provide.js b/test/node/one-provide.js
index 9205746ca6..83d25309bd 100644
--- a/test/node/one-provide.js
+++ b/test/node/one-provide.js
@@ -1,3 +1,5 @@
+'use strict';
+
 const assert = require('assert');
 const fs = require('fs');
 const glob = require('glob');