diff --git a/quic/test_tools/quic_test_client.cc b/quic/test_tools/quic_test_client.cc
index eaec7eb..9dcfb42 100644
--- a/quic/test_tools/quic_test_client.cc
+++ b/quic/test_tools/quic_test_client.cc
@@ -658,7 +658,9 @@
 
 void QuicTestClient::Disconnect() {
   ClearPerConnectionState();
-  client_->Disconnect();
+  if (client_->initialized()) {
+    client_->Disconnect();
+  }
   connect_attempted_ = false;
 }