diff --git a/tests/test-encode-decode-data.cpp b/tests/test-encode-decode-data.cpp
index 6599a1e..d5e0f32 100644
--- a/tests/test-encode-decode-data.cpp
+++ b/tests/test-encode-decode-data.cpp
@@ -108,9 +108,9 @@
   cout << "signedInfo.keyLocator: ";
   if (data.getSignedInfo().getKeyLocator().getType() >= 0) {
     if (data.getSignedInfo().getKeyLocator().getType() == ndn_KeyLocatorType_KEY)
-      cout << "Key: " << toHex(data.getSignedInfo().getKeyLocator().getKeyOrCertificate()) << endl;
+      cout << "Key: " << data.getSignedInfo().getKeyLocator().getKeyOrCertificate().size() << " bytes" << endl;
     else if (data.getSignedInfo().getKeyLocator().getType() == ndn_KeyLocatorType_CERTIFICATE)
-      cout << "Certificate: " << toHex(data.getSignedInfo().getKeyLocator().getKeyOrCertificate()) << endl;
+      cout << "Certificate: " << data.getSignedInfo().getKeyLocator().getKeyOrCertificate().size() << " bytes" << endl;
     else if (data.getSignedInfo().getKeyLocator().getType() == ndn_KeyLocatorType_KEYNAME)
       // TODO: Implement keyName.
       cout << "keyName" << endl;