diff --git a/include/boost/json/impl/monotonic_resource.ipp b/include/boost/json/impl/monotonic_resource.ipp
index a42c7023..0dc4a4f3 100644
--- a/include/boost/json/impl/monotonic_resource.ipp
+++ b/include/boost/json/impl/monotonic_resource.ipp
@@ -127,7 +127,7 @@ monotonic_resource::
 do_is_equal(
     memory_resource const& mr) const noexcept
 {
-    return false;
+    return this == &mr;
 }
 
 } // json
diff --git a/test/storage_ptr.cpp b/test/storage_ptr.cpp
index a5c16aaf..459953a0 100644
--- a/test/storage_ptr.cpp
+++ b/test/storage_ptr.cpp
@@ -45,9 +45,9 @@ public:
 
         bool
         do_is_equal(
-            memory_resource const&) const noexcept override
+            memory_resource const& mr) const noexcept override
         {
-            return false;
+            return this == &mr;
         }
     };
 
diff --git a/test/test.hpp b/test/test.hpp
index 5befcc2a..e4dd6b53 100644
--- a/test/test.hpp
+++ b/test/test.hpp
@@ -81,7 +81,7 @@ struct fail_resource
     do_is_equal(
         memory_resource const& mr) const noexcept override
     {
-        return false;
+        return this == &mr;
     }
 };
 
@@ -134,7 +134,7 @@ struct unique_resource
     do_is_equal(
         memory_resource const& mr) const noexcept override
     {
-        return false;
+        return this == &mr;
     }
 };