diff --git a/test/blockheader.js b/test/blockheader.js
index 6fec516..6647f0e 100644
--- a/test/blockheader.js
+++ b/test/blockheader.js
@@ -1,7 +1,9 @@
-var Blockheader = require('../lib/blockheader');
-var BufferWriter = require('../lib/bufferwriter');
-var BufferReader = require('../lib/bufferreader');
+'use strict';
+
 var should = require('chai').should();
+var bitcore = require('..');
+var Blockheader = bitcore.Blockheader;
+var BufferReader = bitcore.BufferReader;
 
 describe('Blockheader', function() {
   
@@ -22,8 +24,8 @@ describe('Blockheader', function() {
     bits: bits,
     nonce: nonce
   });
-  bhhex = '0100000005050505050505050505050505050505050505050505050505050505050505050909090909090909090909090909090909090909090909090909090909090909020000000300000004000000';
-  bhbuf = new Buffer(bhhex, 'hex');
+  var bhhex = '0100000005050505050505050505050505050505050505050505050505050505050505050909090909090909090909090909090909090909090909090909090909090909020000000300000004000000';
+  var bhbuf = new Buffer(bhhex, 'hex');
 
   it('should make a new blockheader', function() {
     var blockheader = new Blockheader();