diff --git a/test/opcode.js b/test/opcode.js
index e531c9a..eb65420 100644
--- a/test/opcode.js
+++ b/test/opcode.js
@@ -1,10 +1,14 @@
+'use strict';
+
 var should = require('chai').should();
-var Opcode = require('../lib/opcode');
+var bitcore = require('..');
+var Opcode = bitcore.Opcode;
 
 describe('Opcode', function() {
 
   it('should create a new Opcode', function() {
     var opcode = new Opcode(5);
+    should.exist(opcode);
   });
   
   it('should convert to a string with this handy syntax', function() {