diff --git a/quic/test_tools/quic_test_server.h b/quic/test_tools/quic_test_server.h
index bbde27b..34f2ba8 100644
--- a/quic/test_tools/quic_test_server.h
+++ b/quic/test_tools/quic_test_server.h
@@ -54,7 +54,7 @@
     virtual ~CryptoStreamFactory() {}
 
     // Returns a new QuicCryptoServerStreamBase owned by the caller
-    virtual QuicCryptoServerStreamBase* CreateCryptoStream(
+    virtual std::unique_ptr<QuicCryptoServerStreamBase> CreateCryptoStream(
         const QuicCryptoServerConfig* crypto_config,
         QuicServerSessionBase* session) = 0;
   };