diff --git a/test/unordered/deduction_tests.cpp b/test/unordered/deduction_tests.cpp
index 571aa7fa..7d3996e3 100644
--- a/test/unordered/deduction_tests.cpp
+++ b/test/unordered/deduction_tests.cpp
@@ -35,8 +35,8 @@ template <typename T> struct test_allocator
   typedef T value_type;
   test_allocator() = default;
   template <typename T2> test_allocator(test_allocator<T2> const&) {}
-  T* allocate(std::size_t n) const { return (T*)malloc(sizeof(T) * n); }
-  void deallocate(T* ptr, std::size_t) const { free(ptr); }
+  T* allocate(std::size_t n) const { return (T*)(::operator new(sizeof(T) * n)); }
+  void deallocate(T* ptr, std::size_t) const { ::operator delete(ptr); }
   bool operator==(test_allocator const&) const { return true; }
   bool operator!=(test_allocator const&) const { return false; }
 };
diff --git a/test/unordered/reserve_tests.cpp b/test/unordered/reserve_tests.cpp
index 29b4b5b0..7ef0c5c4 100644
--- a/test/unordered/reserve_tests.cpp
+++ b/test/unordered/reserve_tests.cpp
@@ -30,13 +30,13 @@ template <typename T> struct A
   {
     total_allocation += n * sizeof(T);
     ++num_allocations;
-    return (T*)std::calloc(n, sizeof(T));
+    return (T*)(::operator new(n * sizeof(T)));
   }
 
   void deallocate(T* p, std::size_t n) noexcept
   {
     total_allocation -= n * sizeof(T);
-    std::free(p);
+    ::operator delete(p);
   }
 
   bool operator==(A const& a) const { return i == a.i; }