diff --git a/test/cfoa/helpers.hpp b/test/cfoa/helpers.hpp
index 02ecfa05..a4db7e44 100644
--- a/test/cfoa/helpers.hpp
+++ b/test/cfoa/helpers.hpp
@@ -458,6 +458,7 @@ template <class T> class ptr
 
 public:
   ptr() : ptr_(0) {}
+  ptr(std::nullptr_t) : ptr_(nullptr) {}
   explicit ptr(void_ptr const& x) : ptr_((T*)x.ptr_) {}
 
   T& operator*() const { return *ptr_; }
diff --git a/test/objects/minimal.hpp b/test/objects/minimal.hpp
index c2690db3..bf94d924 100644
--- a/test/objects/minimal.hpp
+++ b/test/objects/minimal.hpp
@@ -307,6 +307,7 @@ namespace test {
 
     public:
       ptr() : ptr_(0) {}
+      ptr(std::nullptr_t) : ptr_(0) {}
       explicit ptr(void_ptr const& x) : ptr_((T*)x.ptr_) {}
 
       T& operator*() const { return *ptr_; }
@@ -325,6 +326,18 @@ namespace test {
       ptr operator+(std::ptrdiff_t s) const { return ptr<T>(ptr_ + s); }
       friend ptr operator+(std::ptrdiff_t s, ptr p) { return ptr<T>(s + p.ptr_); }
 
+      ptr& operator+=(std::ptrdiff_t s)
+      {
+        ptr_ += s;
+        return *this;
+      }
+
+      ptr& operator-=(std::ptrdiff_t s)
+      {
+        ptr_ -= s;
+        return *this;
+      }
+
       std::ptrdiff_t operator-(ptr p) const { return ptr_ - p.ptr_; }
       ptr operator-(std::ptrdiff_t s) const { return ptr(ptr_ - s); }
       T& operator[](std::ptrdiff_t s) const { return ptr_[s]; }
@@ -340,6 +353,8 @@ namespace test {
 
       bool operator==(ptr const& x) const { return ptr_ == x.ptr_; }
       bool operator!=(ptr const& x) const { return ptr_ != x.ptr_; }
+      bool operator==(std::nullptr_t) const { return ptr_ == nullptr; }
+      bool operator!=(std::nullptr_t) const { return ptr_ != nullptr; }
       bool operator<(ptr const& x) const { return ptr_ < x.ptr_; }
       bool operator>(ptr const& x) const { return ptr_ > x.ptr_; }
       bool operator<=(ptr const& x) const { return ptr_ <= x.ptr_; }
@@ -660,6 +675,9 @@ namespace boost {
     {
       typedef ::test::minimal::ptr<U> type;
     };
+
+    template<class U>
+    using rebind=typename rebind_to<U>::type;
   };
 }
 
diff --git a/test/objects/test.hpp b/test/objects/test.hpp
index 853e2205..bb2b2896 100644
--- a/test/objects/test.hpp
+++ b/test/objects/test.hpp
@@ -16,6 +16,9 @@
 #include <boost/limits.hpp>
 #include <cstddef>
 
+template <class T> struct allocator1;
+template <class T> struct allocator2;
+
 namespace test {
   // Note that the default hash function will work for any equal_to (but not
   // very well).
@@ -506,14 +509,18 @@ namespace test {
 
   template <class T> class ptr
   {
+    friend struct ::allocator1<T>;
+    friend struct ::allocator2<T>;
     friend class allocator2<T>;
     friend class const_ptr<T>;
     friend struct void_ptr;
 
-  public:
     T* ptr_;
     ptr(T* x) : ptr_(x) {}
+
+  public:
     ptr() : ptr_(0) {}
+    ptr(std::nullptr_t) : ptr_(nullptr) {}
     explicit ptr(void_ptr const& x) : ptr_((T*)x.ptr_) {}
 
     T& operator*() const { return *ptr_; }
@@ -537,6 +544,7 @@ namespace test {
     ptr operator-(std::ptrdiff_t s) const { return ptr(ptr_ - s); }
 
     ptr& operator+=(std::ptrdiff_t s) { ptr_ += s; return *this; }
+    ptr& operator-=(std::ptrdiff_t s) { ptr_ -= s; return *this; }
 
     T& operator[](std::ptrdiff_t s) const { return ptr_[s]; }
     bool operator!() const { return !ptr_; }
@@ -727,6 +735,9 @@ namespace boost {
     {
       typedef ::test::ptr<U> type;
     };
+
+    template<class U>
+    using rebind=typename rebind_to<U>::type;
   };
 } // namespace boost