signature-info: add signed Interest elements

refs #4804

Change-Id: Ice910b7740212cf116ddac24e12634877f75c71e
diff --git a/tests/identity-management-fixture.cpp b/tests/identity-management-fixture.cpp
index 781b2a1..3877a23 100644
--- a/tests/identity-management-fixture.cpp
+++ b/tests/identity-management-fixture.cpp
@@ -1,6 +1,6 @@
 /* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
 /*
- * Copyright (c) 2013-2018 Regents of the University of California.
+ * Copyright (c) 2013-2020 Regents of the University of California.
  *
  * This file is part of ndn-cxx library (NDN C++ library with eXperimental eXtensions).
  *
@@ -93,7 +93,7 @@
 
   v2::AdditionalDescription description;
   description.set("type", "sub-certificate");
-  info.appendTypeSpecificTlv(description.wireEncode());
+  info.addCustomTlv(description.wireEncode());
 
   m_keyChain.sign(request, signingByIdentity(issuer).setSignatureInfo(info));
   m_keyChain.setDefaultCertificate(subIdentity.getDefaultKey(), request);