diff --git a/tests/spdylay_session_test.c b/tests/spdylay_session_test.c
index 47e6d30..fbe6c7a 100644
--- a/tests/spdylay_session_test.c
+++ b/tests/spdylay_session_test.c
@@ -2040,4 +2040,6 @@ void test_spdylay_session_get_outbound_queue_size()
 
   CU_ASSERT(0 == spdylay_submit_goaway(session, SPDYLAY_GOAWAY_OK));
   CU_ASSERT(2 == spdylay_session_get_outbound_queue_size(session));
+
+  spdylay_session_del(session);
 }