diff --git a/unit_test/test_s3sdk.c b/unit_test/test_s3sdk.c
index 72f75993f..22a3f1d54 100644
--- a/unit_test/test_s3sdk.c
+++ b/unit_test/test_s3sdk.c
@@ -21,7 +21,7 @@
 #include "XGetopt.h"
 #endif
 
-#undef DEBUG
+#define DEBUG
 
 #define SELF_CLEAN