Index: test/std/utilities/memory/unique.ptr/unique.ptr.runtime/null_ctor.pass.cpp
===================================================================
--- test/std/utilities/memory/unique.ptr/unique.ptr.runtime/null_ctor.pass.cpp
+++ test/std/utilities/memory/unique.ptr/unique.ptr.runtime/null_ctor.pass.cpp
@@ -36,7 +36,7 @@
     Deleter d;
     assert(d.state() == 0);
     {
-    std::unique_ptr<int[], Deleter&> p(0, d);
+    std::unique_ptr<int[], Deleter&> p(nullptr, d);
     assert(p.get() == 0);
     assert(&p.get_deleter() == &d);
     }
Index: test/std/utilities/memory/unique.ptr/unique.ptr.runtime/unique.ptr.runtime.ctor/pointer_deleter01.pass.cpp
===================================================================
--- test/std/utilities/memory/unique.ptr/unique.ptr.runtime/unique.ptr.runtime.ctor/pointer_deleter01.pass.cpp
+++ test/std/utilities/memory/unique.ptr/unique.ptr.runtime/unique.ptr.runtime.ctor/pointer_deleter01.pass.cpp
@@ -42,7 +42,9 @@
     assert(A::count == 0);
 
     { // LWG#2520 says that nullptr is a valid input as well as null
+#ifdef _LIBCPP_VERSION
     std::unique_ptr<A[], Deleter<A[]> > s1(NULL, Deleter<A[]>());
+#endif
     std::unique_ptr<A[], Deleter<A[]> > s2(nullptr, Deleter<A[]>());
     }
     assert(A::count == 0);