Index: source/lib/tests/test_secure_crt.h
===================================================================
--- source/lib/tests/test_secure_crt.h
+++ source/lib/tests/test_secure_crt.h
@@ -309,8 +309,8 @@
 	static void TEST_WPRINTF(wchar_t* dst, size_t max_dst_chars, const wchar_t* dst_val,
 		int expected_ret, const wchar_t* expected_dst, const wchar_t* fmt, ...)
 	{
-		TS_ASSERT(dst);
-		wcscpy(dst, dst_val);
+		if (dst)
+			wcscpy(dst, dst_val);
 		va_list ap;
 		va_start(ap, fmt);
 		int ret = vswprintf_s(dst, max_dst_chars, fmt, ap);