diff --git a/test/test.ecdsa.js b/test/test.ecdsa.js
index d1fbc99..76886f4 100644
--- a/test/test.ecdsa.js
+++ b/test/test.ecdsa.js
@@ -17,9 +17,9 @@ describe("ECDSA", function() {
   var ecdsa = new ECDSA();
   ecdsa.hashbuf = Hash.sha256(new Buffer('test data'));
   ecdsa.key = new Key();
-  ecdsa.key.privkey = new Privkey(BN.fromBuffer(new Buffer('fee0a1f7afebf9d2a5a80c0c98a31c709681cce195cbcd06342b517970c0be1e', 'hex')));
-  ecdsa.key.pubkey = new Pubkey(point(BN.fromBuffer(new Buffer('ac242d242d23be966085a2b2b893d989f824e06c9ad0395a8a52f055ba39abb2', 'hex')),
-                                      BN.fromBuffer(new Buffer('4836ab292c105a711ed10fcfd30999c31ff7c02456147747e03e739ad527c380', 'hex'))));
+  ecdsa.key.privkey = new Privkey(BN().fromBuffer(new Buffer('fee0a1f7afebf9d2a5a80c0c98a31c709681cce195cbcd06342b517970c0be1e', 'hex')));
+  ecdsa.key.pubkey = new Pubkey(point(BN().fromBuffer(new Buffer('ac242d242d23be966085a2b2b893d989f824e06c9ad0395a8a52f055ba39abb2', 'hex')),
+                                      BN().fromBuffer(new Buffer('4836ab292c105a711ed10fcfd30999c31ff7c02456147747e03e739ad527c380', 'hex'))));
 
   describe('#calci', function() {