diff --git a/test/buffer.cpp b/test/buffer.cpp
index 0e11b54e..f465a17b 100644
--- a/test/buffer.cpp
+++ b/test/buffer.cpp
@@ -85,6 +85,8 @@ TEST(buffer, zbuffer_c)
     EXPECT_EQ(0, msgpack_zbuffer_write(&zbuf, "", 0));
 
     EXPECT_TRUE(msgpack_zbuffer_flush(&zbuf) != NULL);
+
+    msgpack_zbuffer_destroy(&zbuf);
 }