diff --git a/test/transaction.js b/test/transaction.js
index d07061adb7..4e7c4baaaa 100644
--- a/test/transaction.js
+++ b/test/transaction.js
@@ -51,6 +51,14 @@ describe('Transaction', function() {
     })
   })
 
+  describe('toString', function() {
+    it('is just an alias for getId', function() {
+      var transaction = new Transaction()
+
+      assert.equal(transaction.toString, transaction.getId)
+    })
+  })
+
   describe('addInput', function() {
     // FIXME: not as pretty as could be
     // Probably a bit representative of the API