diff --git a/Eigen/src/Core/ArrayBase.h b/Eigen/src/Core/ArrayBase.h
index 2c9ace4a7..c528de733 100644
--- a/Eigen/src/Core/ArrayBase.h
+++ b/Eigen/src/Core/ArrayBase.h
@@ -177,6 +177,59 @@ template<typename Derived> class ArrayBase
     {EIGEN_STATIC_ASSERT(std::ptrdiff_t(sizeof(typename OtherDerived::Scalar))==-1,YOU_CANNOT_MIX_ARRAYS_AND_MATRICES); return *this;}
 };
 
+#ifdef EIGEN_TEST_EVALUATORS
+/** replaces \c *this by \c *this - \a other.
+  *
+  * \returns a reference to \c *this
+  */
+template<typename Derived>
+template<typename OtherDerived>
+EIGEN_STRONG_INLINE Derived &
+ArrayBase<Derived>::operator-=(const ArrayBase<OtherDerived> &other)
+{
+  call_assignment(derived(), other.derived(), internal::sub_assign_op<Scalar>());
+  return derived();
+}
+
+/** replaces \c *this by \c *this + \a other.
+  *
+  * \returns a reference to \c *this
+  */
+template<typename Derived>
+template<typename OtherDerived>
+EIGEN_STRONG_INLINE Derived &
+ArrayBase<Derived>::operator+=(const ArrayBase<OtherDerived>& other)
+{
+  call_assignment(derived(), other.derived(), internal::add_assign_op<Scalar>());
+  return derived();
+}
+
+/** replaces \c *this by \c *this * \a other coefficient wise.
+  *
+  * \returns a reference to \c *this
+  */
+template<typename Derived>
+template<typename OtherDerived>
+EIGEN_STRONG_INLINE Derived &
+ArrayBase<Derived>::operator*=(const ArrayBase<OtherDerived>& other)
+{
+  call_assignment(derived(), other.derived(), internal::mul_assign_op<Scalar>());
+  return derived();
+}
+
+/** replaces \c *this by \c *this / \a other coefficient wise.
+  *
+  * \returns a reference to \c *this
+  */
+template<typename Derived>
+template<typename OtherDerived>
+EIGEN_STRONG_INLINE Derived &
+ArrayBase<Derived>::operator/=(const ArrayBase<OtherDerived>& other)
+{
+  call_assignment(derived(), other.derived(), internal::div_assign_op<Scalar>());
+  return derived();
+}
+#else // EIGEN_TEST_EVALUATORS
 /** replaces \c *this by \c *this - \a other.
   *
   * \returns a reference to \c *this
@@ -232,6 +285,7 @@ ArrayBase<Derived>::operator/=(const ArrayBase<OtherDerived>& other)
   tmp = other.derived();
   return derived();
 }
+#endif
 
 } // end namespace Eigen
 
diff --git a/Eigen/src/Core/SelfCwiseBinaryOp.h b/Eigen/src/Core/SelfCwiseBinaryOp.h
index 65864adf8..ae7f9b887 100644
--- a/Eigen/src/Core/SelfCwiseBinaryOp.h
+++ b/Eigen/src/Core/SelfCwiseBinaryOp.h
@@ -12,6 +12,8 @@
 
 namespace Eigen { 
 
+#ifndef  EIGEN_TEST_EVALUATORS
+  
 /** \class SelfCwiseBinaryOp
   * \ingroup Core_Module
   *
@@ -179,6 +181,51 @@ template<typename BinaryOp, typename Lhs, typename Rhs> class SelfCwiseBinaryOp
     SelfCwiseBinaryOp& operator=(const SelfCwiseBinaryOp&);
 };
 
+#endif // EIGEN_TEST_EVALUATORS
+
+#ifdef EIGEN_TEST_EVALUATORS
+template<typename Derived>
+inline Derived& DenseBase<Derived>::operator*=(const Scalar& other)
+{
+  typedef typename Derived::PlainObject PlainObject;
+  internal::call_assignment(this->derived(), PlainObject::Constant(rows(),cols(),other), internal::mul_assign_op<Scalar>());
+  return derived();
+}
+
+template<typename Derived>
+inline Derived& ArrayBase<Derived>::operator+=(const Scalar& other)
+{
+  typedef typename Derived::PlainObject PlainObject;
+  internal::call_assignment(this->derived(), PlainObject::Constant(rows(),cols(),other), internal::add_assign_op<Scalar>());
+  return derived();
+}
+
+template<typename Derived>
+inline Derived& ArrayBase<Derived>::operator-=(const Scalar& other)
+{
+  typedef typename Derived::PlainObject PlainObject;
+  internal::call_assignment(this->derived(), PlainObject::Constant(rows(),cols(),other), internal::sub_assign_op<Scalar>());
+  return derived();
+}
+
+template<typename Derived>
+inline Derived& DenseBase<Derived>::operator/=(const Scalar& other)
+{
+  typedef typename Derived::PlainObject PlainObject;
+  
+  typedef typename internal::conditional<NumTraits<Scalar>::IsInteger,
+                                        internal::div_assign_op<Scalar>,
+                                        internal::mul_assign_op<Scalar> >::type AssignOp;
+
+  Scalar actual_other;
+  if(NumTraits<Scalar>::IsInteger)  actual_other = other;
+  else                              actual_other = Scalar(1)/other;
+  
+  internal::call_assignment(this->derived(), PlainObject::Constant(rows(),cols(),actual_other), AssignOp());
+  
+  return derived();
+}
+#else
 template<typename Derived>
 inline Derived& DenseBase<Derived>::operator*=(const Scalar& other)
 {
@@ -220,6 +267,7 @@ inline Derived& DenseBase<Derived>::operator/=(const Scalar& other)
   tmp = PlainObject::Constant(rows(),cols(), actual_other);
   return derived();
 }
+#endif
 
 } // end namespace Eigen