diff --git a/js/models/Wallet.js b/js/models/Wallet.js
index be28d3808..95ff9e6f7 100644
--- a/js/models/Wallet.js
+++ b/js/models/Wallet.js
@@ -5,6 +5,7 @@ var preconditions = require('preconditions').singleton();
 var inherits = require('inherits');
 var events = require('events');
 var async = require('async');
+var request = require('request');
 
 var bitcore = require('bitcore');
 var BIP21 = bitcore.BIP21;
diff --git a/js/util/HTTP.js b/js/util/HTTP.js
index 00daa6d93..e900c5334 100644
--- a/js/util/HTTP.js
+++ b/js/util/HTTP.js
@@ -1,3 +1,5 @@
+var preconditions = require('preconditions').singleton();
+
 module.exports = {
   request: function(options, callback) {
     preconditions.checkArgument(_.isObject(options));
@@ -25,9 +27,9 @@ module.exports = {
     var req = options;
 
     req.headers = req.headers || {};
-    req.body = req.body || req.data || {};
+    req.body = req.body || req.data || '';
 
-    var xhr = new XMLHttpRequest();
+    var xhr = options.xhr || new XMLHttpRequest();
     xhr.open(method, url, true);
 
     Object.keys(req.headers).forEach(function(key) {
@@ -51,6 +53,7 @@ module.exports = {
           headers[$1.toLowerCase()] = $2;
         }
       );
+
       return ret._success(buf, xhr.status, headers, options);
     };
 
diff --git a/package.json b/package.json
index e556cb370..108961d7e 100644
--- a/package.json
+++ b/package.json
@@ -31,7 +31,7 @@
   },
   "scripts": {
     "start": "node server.js",
-    "coverage": "./node_modules/.bin/istanbul cover ./node_modules/.bin/_mocha -- --reporter spec test",
+    "coverage": "./node_modules/.bin/istanbul cover -x lib/sjcl.js ./node_modules/.bin/_mocha -- --reporter spec test",
     "test": "sh test/run.sh",
     "dist": "node shell/scripts/dist.js",
     "shell": "node shell/scripts/launch.js",
diff --git a/test/util.crypto.js b/test/util.crypto.js
index 765e537ba..c6171e1ea 100644
--- a/test/util.crypto.js
+++ b/test/util.crypto.js
@@ -14,6 +14,19 @@ describe('crypto utils', function() {
     decrypted.should.equal(message);
   });
 
+
+  it('should decrypt what it encrypts (JSON)', function() {
+
+    var key = 'My secret key';
+    var message = {'hola': 'picho'};
+    var encrypted = cryptoUtils.encrypt(key, message);
+    var decrypted = cryptoUtils.decrypt(key, encrypted);
+
+    JSON.parse(decrypted).should.deep.equal(message);
+  });
+
+
+
   it('should return null if the provided key cant decrypt', function() {
     var key = 'My secret key';
     var message = 'My secret message';
@@ -22,6 +35,17 @@ describe('crypto utils', function() {
 
     assert(decrypted === null);
   });
+ 
+
+
+  it('should sign a message', function() {
+    var key = 'My secret key';
+    var message = 'My secret message';
+    var signature = cryptoUtils.hmac(key, message);
+    signature.should.be.equal('6tpegxYl/Eig9k1Lla8b8G8OcdtOxyNbDsdyic1Yzh4=');
+  });
+ 
+
 
   var tests = [
     {
@@ -55,6 +79,11 @@ describe('crypto utils', function() {
       phrase.should.equal(expected);
     });
   });
+  it('should generate a passphrase using default salt/iter', function() {
+    var phrase = cryptoUtils.kdf('Pwd123!@#$%^&*(){}[]\|/?.>,<=+-_`~åéþ䲤þçæ¶');
+    var expected = 'ml+mMtjgcvL2pdfDwQqW2qONRNjZ3YD8KnGeV3aFjyOoM0ByOmoREw9zBvowC/ZXsfrezbRXX/W/XIzKOqdrXA==';
+    phrase.should.equal(expected);
+  });
 
 
 });