diff --git a/libcxx/test/std/utilities/utility/mem.res/mem.res.global/new_delete_resource.pass.cpp b/libcxx/test/std/utilities/utility/mem.res/mem.res.global/new_delete_resource.pass.cpp
index 68a82f6ce90b34..7b3107029d4d89 100644
--- a/libcxx/test/std/utilities/utility/mem.res/mem.res.global/new_delete_resource.pass.cpp
+++ b/libcxx/test/std/utilities/utility/mem.res/mem.res.global/new_delete_resource.pass.cpp
@@ -76,7 +76,7 @@ void test_allocate_deallocate() {
   ASSERT_WITH_LIBRARY_INTERNAL_ALLOCATIONS(globalMemCounter.checkOutstandingNewEq(1));
   ASSERT_WITH_LIBRARY_INTERNAL_ALLOCATIONS(globalMemCounter.checkLastNewSizeEq(50));
 
-  r1.deallocate(ret, 1);
+  r1.deallocate(ret, 50);
   assert(globalMemCounter.checkOutstandingNewEq(0));
   ASSERT_WITH_LIBRARY_INTERNAL_ALLOCATIONS(globalMemCounter.checkDeleteCalledEq(1));
 }