diff --git a/quic/core/quic_connection_test.cc b/quic/core/quic_connection_test.cc
index 4072ecd..56b0453 100644
--- a/quic/core/quic_connection_test.cc
+++ b/quic/core/quic_connection_test.cc
@@ -1368,6 +1368,8 @@
 
     QuicConnectionCloseFrame qccf(QUIC_PEER_GOING_AWAY);
     if (peer_framer_.transport_version() == QUIC_VERSION_99) {
+      // Default close-type is Google QUIC. If doing IETF/V99 then
+      // set close type to be IETF CC/T.
       qccf.close_type = IETF_QUIC_TRANSPORT_CONNECTION_CLOSE;
     }
 
@@ -7233,6 +7235,8 @@
 
   QuicConnectionCloseFrame qccf(QUIC_PEER_GOING_AWAY);
   if (peer_framer_.transport_version() == QUIC_VERSION_99) {
+    // Default close-type is Google QUIC. If doing IETF/V99 then
+    // set close type to be IETF CC/T.
     qccf.close_type = IETF_QUIC_TRANSPORT_CONNECTION_CLOSE;
   }