diff --git a/test/msgpack_vref.cpp b/test/msgpack_vref.cpp
index 9a7f188c..dfd00e01 100644
--- a/test/msgpack_vref.cpp
+++ b/test/msgpack_vref.cpp
@@ -267,11 +267,11 @@ TEST(MSGPACK, vrefbuffer_small_int64)
 
 TEST(MSGPACK, vref_buffer_overflow)
 {
-    size_t ref_size = 0;	
+    size_t ref_size = 0;
     size_t chunk_size = std::numeric_limits<size_t>::max();
-    char *buf = (char *)malloc(chunk_size);
+    char *buf = (char *)malloc(0x1000);
     ASSERT_THROW(msgpack::vrefbuffer vbuf(ref_size, chunk_size), std::bad_alloc);
-//    msgpack::vrefbuffer vbuf2(0, 0x1000);
-//    ASSERT_THROW(vbuf2.append_copy(buf, chunk_size), std::bad_alloc);
+    msgpack::vrefbuffer vbuf2(0, 0x1000);
+    ASSERT_THROW(vbuf2.append_copy(buf, chunk_size), std::bad_alloc);
     free(buf);
 }