Index: libcxx/test/std/language.support/support.dynamic/new.delete/new.delete.array/new_array_nothrow_replace.pass.cpp
===================================================================
--- libcxx/test/std/language.support/support.dynamic/new.delete/new.delete.array/new_array_nothrow_replace.pass.cpp
+++ libcxx/test/std/language.support/support.dynamic/new.delete/new.delete.array/new_array_nothrow_replace.pass.cpp
@@ -50,11 +50,11 @@
     DoNotOptimize(ap);
     assert(ap);
     assert(A_constructed == 3);
-    assert(new_called);
+    ASSERT_VIA_OVERRIDDEN_NEW(new_called);
     delete [] ap;
     DoNotOptimize(ap);
     assert(A_constructed == 0);
-    assert(!new_called);
+    ASSERT_VIA_OVERRIDDEN_DELETE(!new_called);
 
   return 0;
 }
Index: libcxx/test/std/language.support/support.dynamic/new.delete/new.delete.array/new_array_replace.pass.cpp
===================================================================
--- libcxx/test/std/language.support/support.dynamic/new.delete/new.delete.array/new_array_replace.pass.cpp
+++ libcxx/test/std/language.support/support.dynamic/new.delete/new.delete.array/new_array_replace.pass.cpp
@@ -11,7 +11,6 @@
 // UNSUPPORTED: sanitizer-new-delete
 // XFAIL: libcpp-no-vcruntime
 
-
 #include <new>
 #include <cstddef>
 #include <cstdlib>
@@ -51,11 +50,11 @@
     DoNotOptimize(ap);
     assert(ap);
     assert(A_constructed == 3);
-    assert(new_called == 1);
+    ASSERT_VIA_OVERRIDDEN_NEW(new_called == 1);
     delete [] ap;
     DoNotOptimize(ap);
     assert(A_constructed == 0);
-    assert(new_called == 0);
+    ASSERT_VIA_OVERRIDDEN_DELETE(new_called == 0);
 
   return 0;
 }
Index: libcxx/test/std/language.support/support.dynamic/new.delete/new.delete.single/new_nothrow_replace.pass.cpp
===================================================================
--- libcxx/test/std/language.support/support.dynamic/new.delete/new.delete.single/new_nothrow_replace.pass.cpp
+++ libcxx/test/std/language.support/support.dynamic/new.delete/new.delete.single/new_nothrow_replace.pass.cpp
@@ -50,11 +50,11 @@
     DoNotOptimize(ap);
     assert(ap);
     assert(A_constructed);
-    assert(new_called);
+    ASSERT_VIA_OVERRIDDEN_NEW(new_called);
     delete ap;
     DoNotOptimize(ap);
     assert(!A_constructed);
-    assert(!new_called);
+    ASSERT_VIA_OVERRIDDEN_DELETE(!new_called);
 
   return 0;
 }
Index: libcxx/test/support/test_macros.h
===================================================================
--- libcxx/test/support/test_macros.h
+++ libcxx/test/support/test_macros.h
@@ -328,6 +328,18 @@
     static_assert((test_macros_detail::is_same<__VA_ARGS__>::value), \
                  "Types differ unexpectedly")
 
+// z/OS has different runtime linking model, references are determined at
+// link step, C++RT new or new[] operator will call the new operator it knows
+// about in shared library not the one user defined. Same with delete
+// operator.
+#if defined(__MVS__)
+#define ASSERT_VIA_OVERRIDDEN_NEW(x)
+#define ASSERT_VIA_OVERRIDDEN_DELETE(x)
+#else
+#define ASSERT_VIA_OVERRIDDEN_NEW(x) assert(x)
+#define ASSERT_VIA_OVERRIDDEN_DELETE(x) assert(x)
+#endif
+
 #ifndef TEST_HAS_NO_EXCEPTIONS
 #define TEST_THROW(...) throw __VA_ARGS__
 #else