diff --git a/test/base.h b/test/base.h
index e882c191..ffcf61ad 100644
--- a/test/base.h
+++ b/test/base.h
@@ -1,4 +1,4 @@
-/*
+/*
  * Copyright 2017 Leonid Yuriev <leo@yuriev.ru>
  * and other libmdbx authors: please see AUTHORS file.
  * All rights reserved.
@@ -99,7 +99,14 @@
 #pragma warning(disable : 4512) /* assignment operator could                   \
                                    not be generated  */
 #pragma warning(disable : 4610) /* user-defined constructor required */
-#define snprintf _snprintf
+#ifndef snprintf
+#define snprintf(buffer, buffer_size, format, ...)                             \
+  _snprintf_s(buffer, buffer_size, _TRUNCATE, format, __VA_ARGS__)
+#endif
+#ifndef vsnprintf
+#define vsnprintf(buffer, buffer_size, format, args)                           \
+  _vsnprintf_s(buffer, buffer_size, _TRUNCATE, format, args)
+#endif
 #pragma warning(disable : 4996) /* 'vsnprintf': This function or variable      \
                                    may be unsafe */
 #endif