diff --git a/tests/unit/tests_high_five_base.cpp b/tests/unit/tests_high_five_base.cpp
index 5cd0554e4..20e8efdaa 100644
--- a/tests/unit/tests_high_five_base.cpp
+++ b/tests/unit/tests_high_five_base.cpp
@@ -2945,9 +2945,16 @@ TEST_CASE("HighFiveReadType") {
 TEST_CASE("DirectWriteBool") {
     SECTION("Basic compatibility") {
         using IntType = typename std::underlying_type<details::Boolean>::type;
+
+        details::Boolean true_value = details::Boolean::HighFiveTrue;
+        IntType const* const true_ptr = static_cast<IntType const* const>((void*) &true_value);
+
+        details::Boolean false_value = details::Boolean::HighFiveFalse;
+        IntType const* const false_ptr = static_cast<IntType const* const>((void*) &false_value);
+
         CHECK(sizeof(bool) == sizeof(details::Boolean));
-        CHECK(true == static_cast<IntType>(details::Boolean::HighFiveTrue));
-        CHECK(false == static_cast<IntType>(details::Boolean::HighFiveFalse));
+        CHECK(*true_ptr == static_cast<IntType>(details::Boolean::HighFiveTrue));
+        CHECK(*false_ptr == static_cast<IntType>(details::Boolean::HighFiveFalse));
     }
 
     auto file = File("rw_bool_from_ptr.h5", File::Truncate);