diff --git a/quic/test_tools/quic_spdy_session_peer.cc b/quic/test_tools/quic_spdy_session_peer.cc
index b739fa1..dcba12c 100644
--- a/quic/test_tools/quic_spdy_session_peer.cc
+++ b/quic/test_tools/quic_spdy_session_peer.cc
@@ -61,5 +61,11 @@
       id, std::move(headers), fin, priority, std::move(ack_listener));
 }
 
+// static
+QuicStreamId QuicSpdySessionPeer::GetNextOutgoingUnidirectionalStreamId(
+    QuicSpdySession* session) {
+  return session->GetNextOutgoingUnidirectionalStreamId();
+}
+
 }  // namespace test
 }  // namespace quic
diff --git a/quic/test_tools/quic_spdy_session_peer.h b/quic/test_tools/quic_spdy_session_peer.h
index 58a864d..83e8b0c 100644
--- a/quic/test_tools/quic_spdy_session_peer.h
+++ b/quic/test_tools/quic_spdy_session_peer.h
@@ -41,6 +41,9 @@
       bool fin,
       spdy::SpdyPriority priority,
       QuicReferenceCountedPointer<QuicAckListenerInterface> ack_listener);
+  // |session| can't be nullptr.
+  static QuicStreamId GetNextOutgoingUnidirectionalStreamId(
+      QuicSpdySession* session);
 };
 
 }  // namespace test