diff --git a/.eslintrc.js b/.eslintrc.js
new file mode 100644
index 00000000..88dfc81c
--- /dev/null
+++ b/.eslintrc.js
@@ -0,0 +1,12 @@
+/**
+ * @license Copyright (c) 2003-2018, CKSource - Frederico Knabben. All rights reserved.
+ * For licensing, see LICENSE.md.
+ */
+
+/* eslint-env node */
+
+'use strict';
+
+module.exports = {
+	extends: 'ckeditor5'
+};
diff --git a/.travis.yml b/.travis.yml
new file mode 100644
index 00000000..59ddb6e8
--- /dev/null
+++ b/.travis.yml
@@ -0,0 +1,31 @@
+sudo: required
+dist: trusty
+addons:
+  firefox: latest
+  apt:
+    sources:
+    - google-chrome
+    packages:
+    - google-chrome-stable
+language: node_js
+node_js:
+- '8'
+cache:
+- node_modules
+branches:
+  except:
+  - stable
+before_install:
+- export DISPLAY=:99.0
+- sh -e /etc/init.d/xvfb start
+- npm config set package-lock false
+- npm i -g npm@^5.7.1
+install:
+- npm install @ckeditor/ckeditor5-dev-tests
+- ckeditor5-dev-tests-install-dependencies
+script:
+- ckeditor5-dev-tests-travis
+env:
+  global:
+  - secure: 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
+  - secure: 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
diff --git a/package.json b/package.json
index e3a3f22a..0a426dd6 100644
--- a/package.json
+++ b/package.json
@@ -45,6 +45,10 @@
     "@ckeditor/ckeditor5-table": "^11.0.1",
     "@ckeditor/ckeditor5-theme-lark": "^12.0.0",
     "@ckeditor/ckeditor5-upload": "^10.0.4",
+    "eslint": "^5.5.0",
+    "eslint-config-ckeditor5": "^1.0.7",
+    "husky": "^0.14.3",
+    "lint-staged": "^7.0.0",
     "postcss-loader": "^3.0.0",
     "raw-loader": "^1.0.0",
     "style-loader": "^0.23.0",
@@ -66,6 +70,17 @@
   },
   "scripts": {
     "build": "webpack --mode production",
+    "lint": "eslint --quiet '**/*.js'",
+    "precommit": "lint-staged",
     "preversion": "npm run build; if [ -n \"$(git status src/ckeditor.js build/ --porcelain)\" ]; then git add -u src/ckeditor.js build/ && git commit -m 'Internal: Build.'; fi"
-  }
+  },
+  "lint-staged": {
+    "**/*.js": [
+      "eslint --quiet"
+    ]
+  },
+  "eslintIgnore": [
+    "build/**",
+    "packages/**"
+  ]
 }
diff --git a/tests/manual/ckeditor-cjs-version.js b/tests/manual/ckeditor-cjs-version.js
index 3bfa1057..b9a700c3 100644
--- a/tests/manual/ckeditor-cjs-version.js
+++ b/tests/manual/ckeditor-cjs-version.js
@@ -3,6 +3,9 @@
  * For licensing, see LICENSE.md.
  */
 
+/* eslint-env commonjs */
+/* globals window, document, console */
+
 const InlineEditor = require( '../../build/ckeditor' );
 
 InlineEditor.create( document.querySelector( '#editor' ) )
diff --git a/tests/manual/ckeditor.js b/tests/manual/ckeditor.js
index 6e9df647..429a40ea 100644
--- a/tests/manual/ckeditor.js
+++ b/tests/manual/ckeditor.js
@@ -3,6 +3,8 @@
  * For licensing, see LICENSE.md.
  */
 
+/* globals window, document, console */
+
 import InlineEditor from '../../build/ckeditor';
 
 InlineEditor.create( document.querySelector( '#editor' ) )