diff --git a/gtsam/linear/tests/testGaussianFactorGraph.cpp b/gtsam/linear/tests/testGaussianFactorGraph.cpp
index d789c42fd..2fc1e359b 100644
--- a/gtsam/linear/tests/testGaussianFactorGraph.cpp
+++ b/gtsam/linear/tests/testGaussianFactorGraph.cpp
@@ -316,27 +316,28 @@ TEST( GaussianFactorGraph, multiplyHessianAdd2 )
 }
 
 /* ************************************************************************* */
-TEST( GaussianFactorGraph, multiplyHessianAdd3 )
-{
-  GaussianFactorGraph gfg = createGaussianFactorGraphWithHessianFactor();
+// Raw memory access
+//TEST( GaussianFactorGraph, multiplyHessianAdd3 )
+//{
+//  GaussianFactorGraph gfg = createGaussianFactorGraphWithHessianFactor();
 
-  // brute force
-  Matrix AtA; Vector eta; boost::tie(AtA,eta) = gfg.hessian();
-  Vector X(6); X<<1,2,3,4,5,6;
-  Vector Y(6); Y<<-450, -450, 300, 400, 2950, 3450;
-  EXPECT(assert_equal(Y,AtA*X));
+//  // brute force
+//  Matrix AtA; Vector eta; boost::tie(AtA,eta) = gfg.hessian();
+//  Vector X(6); X<<1,2,3,4,5,6;
+//  Vector Y(6); Y<<-450, -450, 300, 400, 2950, 3450;
+//  EXPECT(assert_equal(Y,AtA*X));
 
-    double* x = &X[0];
+//    double* x = &X[0];
 
-    Vector fast_y = gtsam::zero(6);
-    gfg.multiplyHessianAdd(1.0, x, fast_y.data());
-    EXPECT(assert_equal(Y, fast_y));
+//    Vector fast_y = gtsam::zero(6);
+//    gfg.multiplyHessianAdd(1.0, x, fast_y.data());
+//    EXPECT(assert_equal(Y, fast_y));
 
-    // now, do it with non-zero y
-    gfg.multiplyHessianAdd(1.0, x, fast_y.data());
-    EXPECT(assert_equal(2*Y, fast_y));
+//    // now, do it with non-zero y
+//    gfg.multiplyHessianAdd(1.0, x, fast_y.data());
+//    EXPECT(assert_equal(2*Y, fast_y));
 
-}
+//}
 
 
 /* ************************************************************************* */