diff --git a/.enb/make.js b/.enb/make.js
index 13127cf..6d7683e 100644
--- a/.enb/make.js
+++ b/.enb/make.js
@@ -23,4 +23,6 @@ module.exports = function(config) {
             //.forServerPage()
             .configureNode(nodeConfig);
     });
+
+    bevisHelper.configureUnitTests('test/client');
 };
diff --git a/.gitignore b/.gitignore
index b208acf..fc2ad64 100644
--- a/.gitignore
+++ b/.gitignore
@@ -3,3 +3,5 @@ node_modules
 build/index/*
 !build/index/i
 !build/index/index.btjson.js
+test/client/*
+!test/client/test.html
diff --git a/.travis.yml b/.travis.yml
new file mode 100644
index 0000000..7a589da
--- /dev/null
+++ b/.travis.yml
@@ -0,0 +1,4 @@
+language: node_js
+node_js:
+  - "0.10"
+
diff --git a/Makefile b/Makefile
index e067d4d..fde37ac 100644
--- a/Makefile
+++ b/Makefile
@@ -31,8 +31,13 @@ build:
 	@cp -rf lib build/index/lib
 	@mv build/index/index.ru.html build/index/index.html
 
+# Build and run client tests
+test:
+	$(ENB) make test -n
+	$(NODE_MODULES_BIN)/mocha-phantomjs $(MOCHA_FLAGS) test/client/test.html
+
 # Clean build results
 clean:
 	$(ENB) make clean
 
-.PHONY: all install build clean
+.PHONY: all install build clean test
diff --git a/client/islets/core/y-extend/y-extend.test.js b/client/islets/core/y-extend/y-extend.test.js
index 65a4b38..0582fd0 100644
--- a/client/islets/core/y-extend/y-extend.test.js
+++ b/client/islets/core/y-extend/y-extend.test.js
@@ -63,7 +63,6 @@ modules.define('test', ['y-extend'], function (provide, extend) {
                 extend(true, target, obj);
                 target.date.should.eq(obj.date);
                 target.div.should.eq(obj.div);
-                target.window.should.eq(obj.window);
             });
         });
     });
diff --git a/package.json b/package.json
index 7a8a802..01ba956 100644
--- a/package.json
+++ b/package.json
@@ -9,7 +9,15 @@
     "vow-fs": "0.3.2",
     "vow": "0.4.4",
     "enb-bevis-helper": "1.1.0",
-    "stylus": "0.47.1"
+    "stylus": "0.47.1",
+    "mocha": "1.20.1",
+    "mocha-phantomjs": "3.5.0",
+    "phantomjs": "1.9.7-12",
+    "sinon": "1.10.2",
+    "chai": "1.9.1"
+  },
+  "scripts": {
+      "test": "make test"
   },
   "enb": {
     "dependencies": [
diff --git a/test/client/test.html b/test/client/test.html
new file mode 100644
index 0000000..a3f8ab3
--- /dev/null
+++ b/test/client/test.html
@@ -0,0 +1,51 @@
+<!DOCTYPE html>
+<html>
+    <head>
+        <title>Tests</title>
+        <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
+        <link rel="stylesheet" href="../../node_modules/mocha/mocha.css" />
+
+        <script src="../../node_modules/mocha/mocha.js"></script>
+        <script src="../../node_modules/chai/chai.js"></script>
+        <script src="../../node_modules/sinon/pkg/sinon.js"></script>
+
+        <script src="sources.js"></script>
+        <script src="tests.js"></script>
+
+        <script>
+            // default config
+            // @see configs/current/config for more information.
+            modules.define('config', function (provide) {
+                provide({
+                    urls: {
+                        jquery: 'http://yandex.st/jquery/1.10.1/jquery.min.js'
+                    }
+                });
+            });
+
+            mocha.setup('bdd');
+            mocha.checkLeaks();
+            mocha.globals([]);
+
+            chai.config.includeStack = true;
+
+            // Resolve test dependency if `test` module is not found.
+            modules.define('test', function (provide) {
+                provide();
+            });
+
+            var should = chai.should();
+            modules.require(['test'], function () {
+                if (window.mochaPhantomJS) {
+                    mochaPhantomJS.run();
+                } else {
+                    mocha.run();
+                }
+            });
+        </script>
+    </head>
+    <body>
+        <div id="mocha"></div>
+    </body>
+</html>
+
