diff --git a/tests/test.cpp b/tests/test.cpp
index c499ece1d20..581fc6743d5 100644
--- a/tests/test.cpp
+++ b/tests/test.cpp
@@ -770,13 +770,15 @@ void FixedLengthArrayTest() {
   // set memory chunk of size ArrayStruct to 1's
   std::memset(static_cast<void*>(non_zero_memory), 1, arr_size);
   // after placement-new it should be all 0's
-#if defined(_MSC_VER) && defined(_DEBUG)
+#if defined(FLATBUFFERS_MEMORY_LEAK_TRACKING) && \
+    defined(_MSC_VER) && defined(_DEBUG)
 #undef new
 #endif
   MyGame::Example::ArrayStruct* ap =
       new (non_zero_memory) MyGame::Example::ArrayStruct;
-#if defined(_MSC_VER) && defined(_DEBUG)
-#define new DEBUG_NEW
+#if defined(FLATBUFFERS_MEMORY_LEAK_TRACKING) && \
+    defined(_MSC_VER) && defined(_DEBUG)
+  #define new DEBUG_NEW
 #endif
   (void)ap;
   for (size_t i = 0; i < arr_size; ++i) {