diff --git a/.travis.yml b/.travis.yml
index 85c1de6..f928bdf 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -11,3 +11,7 @@ install:
   - npm install
 after_script:
   - gulp coveralls
+env:
+  global:
+    - SAUCE_USERNAME=maraoz
+    - SAUCE_ACCESS_KEY=30055bf8-2def-4e6a-8edd-4adb9fd1de66
diff --git a/.zuul.yml b/.zuul.yml
new file mode 100644
index 0000000..c56d3e2
--- /dev/null
+++ b/.zuul.yml
@@ -0,0 +1,12 @@
+ui: mocha-bdd
+browsers:
+  - name: chrome
+    version: 30..latest
+  - name: firefox
+    version: 30..latest
+  - name: ie
+    version: latest
+  - name: safari
+    version: latest
+browserify:
+  - transform: brfs
diff --git a/README.md b/README.md
index 3cbd2b9..9554abf 100644
--- a/README.md
+++ b/README.md
@@ -5,6 +5,8 @@ Bitcore
 [![Build Status](https://img.shields.io/travis/bitpay/bitcore.svg?branch=master&style=flat-square)](https://travis-ci.org/bitpay/bitcore)
 [![Coverage Status](https://img.shields.io/coveralls/bitpay/bitcore.svg?style=flat-square)](https://coveralls.io/r/bitpay/bitcore)
 
+[![Sauce Test Status](https://saucelabs.com/browser-matrix/maraoz.svg)](https://saucelabs.com/u/maraoz)
+
 A pure and powerful JavaScript Bitcoin library.
 
 ## Principles
diff --git a/package.json b/package.json
index ca724e5..33febb8 100644
--- a/package.json
+++ b/package.json
@@ -6,7 +6,7 @@
   "main": "index.js",
   "scripts": {
     "lint": "gulp lint",
-    "test": "gulp test",
+    "test": "gulp test && ./node_modules/zuul/bin/zuul -- test/*.js",
     "coverage": "gulp coverage",
     "build": "gulp",
     "postinstall": "node ./lib/errors/build.js"
@@ -118,7 +118,8 @@
     "plato": "^1.3.0",
     "run-sequence": "^1.0.2",
     "sinon": "^1.12.2",
-    "through2": "=0.6.3"
+    "through2": "=0.6.3",
+    "zuul": "1.16.3"
   },
   "license": "MIT"
 }
diff --git a/test/transaction/sighash.js b/test/transaction/sighash.js
index e2b9c88..9ee89c8 100644
--- a/test/transaction/sighash.js
+++ b/test/transaction/sighash.js
@@ -2,6 +2,8 @@
 
 var buffer = require('buffer');
 
+var chai = require('chai');
+var should = chai.should();
 var Script = require('../../lib/script');
 var Transaction = require('../../lib/transaction');
 var sighash = require('../../lib/transaction/sighash');