diff --git a/test/transaction_builder.js b/test/transaction_builder.js
index bdfe48e..63ad8be 100644
--- a/test/transaction_builder.js
+++ b/test/transaction_builder.js
@@ -266,7 +266,7 @@ describe('TransactionBuilder', function() {
       var privKeys = [
         "91avARGdfge8E4tZfYLoxeJ5sGBdNJQH4kvjJoQFacbgwmaKkrx",
         "91avARGdfge8E4tZfYLoxeJ5sGBdNJQH4kvjJoQFacbgww7vXtT"
-      ].map(function(wif) { return ECKey.fromWIF(wif) })
+      ].map(ECKey.fromWIF)
       var redeemScript = Script.fromASM("OP_2 0479be667ef9dcbbac55a06295ce870b07029bfcdb2dce28d959f2815b16f81798483ada7726a3c4655da4fbfc0e1108a8fd17b448a68554199c47d08ffb10d4b8 04c6047f9441ed7d6d3045406e95c07cd85c778e4b8cef3ca7abac09b95c709ee51ae168fea63dc339a3c58419466ceaeef7f632653266d0e1236431a950cfe52a OP_2 OP_CHECKMULTISIG")
 
       txb.addInput("4971f016798a167331bcbc67248313fbc444c6e92e4416efd06964425588f5cf", 0)