diff --git a/unittests/CppInterOp/VariableReflectionTest.cpp b/unittests/CppInterOp/VariableReflectionTest.cpp
index b69176c0e..3dcfee44d 100644
--- a/unittests/CppInterOp/VariableReflectionTest.cpp
+++ b/unittests/CppInterOp/VariableReflectionTest.cpp
@@ -93,7 +93,7 @@ TEST(VariableReflectionTest, GetVariableType) {
 
 #define CODE                                                    \
   int a;                                                        \
-  const int N = 5;                                              \
+  [[maybe_unused]] const int N = 5;                                              \
   class C {                                                     \
   public:                                                       \
     int a;                                                      \