diff --git a/projects/mtg/include/config.h b/projects/mtg/include/config.h
index 56fa35a10..551dff5a1 100644
--- a/projects/mtg/include/config.h
+++ b/projects/mtg/include/config.h
@@ -5,7 +5,7 @@
 #define snprintf sprintf_s
 #endif 
 
-#if defined (WIN32) || defined (LINUX)
+#if (defined (WIN32) || defined (LINUX)) && defined (_DEBUG)
 #define TESTSUITE 1
 
 #else