diff --git a/test/test.cbc.js b/test/test.cbc.js
index 024335982..704a2077b 100644
--- a/test/test.cbc.js
+++ b/test/test.cbc.js
@@ -1,3 +1,4 @@
+var AES = require('../lib/expmt/aes');
 var should = require('chai').should();
 var CBC = require('../lib/expmt/cbc');
 
@@ -119,6 +120,21 @@ describe('CBC', function() {
       var buf2 = CBC.decrypt(encbuf, ivbuf, blockcipher, cipherkeybuf);
     });
 
+    it('should encrypt something with AES', function() {
+      var messagebuf1 = new Buffer(128 / 8);
+      messagebuf1.fill(0);
+      var messagebuf2 = new Buffer(128 / 8);
+      messagebuf2.fill(0x10);
+      var messagebuf = Buffer.concat([messagebuf1, messagebuf2]);
+      var ivbuf = new Buffer(128 / 8);
+      ivbuf.fill(0x10);
+      var cipherkeybuf = new Buffer(128 / 8);
+      cipherkeybuf.fill(0);
+      var blockcipher = AES;
+      var encbuf = CBC.encrypt(messagebuf, ivbuf, blockcipher, cipherkeybuf);
+      var buf2 = CBC.decrypt(encbuf, ivbuf, blockcipher, cipherkeybuf);
+    });
+
   });
   
   describe('@decrypt', function() {