diff --git a/test/unalignedassert.cpp b/test/unalignedassert.cpp
new file mode 100644
index 0000000..601dbf2
--- /dev/null
+++ b/test/unalignedassert.cpp
@@ -0,0 +1,127 @@
+// This file is part of Eigen, a lightweight C++ template library
+// for linear algebra.
+//
+// Copyright (C) 2008 Benoit Jacob <jacob.benoit.1@gmail.com>
+//
+// This Source Code Form is subject to the terms of the Mozilla
+// Public License v. 2.0. If a copy of the MPL was not distributed
+// with this file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+#include "main.h"
+
+struct TestNew1
+{
+  MatrixXd m; // good: m will allocate its own array, taking care of alignment.
+  TestNew1() : m(20,20) {}
+};
+
+struct TestNew2
+{
+  Matrix3d m; // good: m's size isn't a multiple of 16 bytes, so m doesn't have to be 16-byte aligned,
+              // 8-byte alignment is good enough here, which we'll get automatically
+};
+
+struct TestNew3
+{
+  Vector2f m; // good: m's size isn't a multiple of 16 bytes, so m doesn't have to be 16-byte aligned
+};
+
+struct TestNew4
+{
+  EIGEN_MAKE_ALIGNED_OPERATOR_NEW
+  Vector2d m;
+  float f; // make the struct have sizeof%16!=0 to make it a little more tricky when we allow an array of 2 such objects
+};
+
+struct TestNew5
+{
+  EIGEN_MAKE_ALIGNED_OPERATOR_NEW
+  float f; // try the f at first -- the EIGEN_ALIGN16 attribute of m should make that still work
+  Matrix4f m;
+};
+
+struct TestNew6
+{
+  Matrix<float,2,2,DontAlign> m; // good: no alignment requested
+  float f;
+};
+
+template<bool Align> struct Depends
+{
+  EIGEN_MAKE_ALIGNED_OPERATOR_NEW_IF(Align)
+  Vector2d m;
+  float f;
+};
+
+template<typename T>
+void check_unalignedassert_good()
+{
+  T *x, *y;
+  x = new T;
+  delete x;
+  y = new T[2];
+  delete[] y;
+}
+
+#if EIGEN_ALIGN_STATICALLY
+template<typename T>
+void construct_at_boundary(int boundary)
+{
+  char buf[sizeof(T)+256];
+  size_t _buf = reinterpret_cast<size_t>(buf);
+  _buf += (16 - (_buf % 16)); // make 16-byte aligned
+  _buf += boundary; // make exact boundary-aligned
+  T *x = ::new(reinterpret_cast<void*>(_buf)) T;
+  x[0].setZero(); // just in order to silence warnings
+  x->~T();
+}
+#endif
+
+void unalignedassert()
+{
+  #if EIGEN_ALIGN_STATICALLY
+  construct_at_boundary<Vector2f>(4);
+  construct_at_boundary<Vector3f>(4);
+  construct_at_boundary<Vector4f>(16);
+  construct_at_boundary<Matrix2f>(16);
+  construct_at_boundary<Matrix3f>(4);
+  construct_at_boundary<Matrix4f>(16);
+
+  construct_at_boundary<Vector2d>(16);
+  construct_at_boundary<Vector3d>(4);
+  construct_at_boundary<Vector4d>(16);
+  construct_at_boundary<Matrix2d>(16);
+  construct_at_boundary<Matrix3d>(4);
+  construct_at_boundary<Matrix4d>(16);
+
+  construct_at_boundary<Vector2cf>(16);
+  construct_at_boundary<Vector3cf>(4);
+  construct_at_boundary<Vector2cd>(16);
+  construct_at_boundary<Vector3cd>(16);
+  #endif
+
+  check_unalignedassert_good<TestNew1>();
+  check_unalignedassert_good<TestNew2>();
+  check_unalignedassert_good<TestNew3>();
+
+  check_unalignedassert_good<TestNew4>();
+  check_unalignedassert_good<TestNew5>();
+  check_unalignedassert_good<TestNew6>();
+  check_unalignedassert_good<Depends<true> >();
+
+#if EIGEN_ALIGN_STATICALLY
+  VERIFY_RAISES_ASSERT(construct_at_boundary<Vector4f>(8));
+  VERIFY_RAISES_ASSERT(construct_at_boundary<Matrix4f>(8));
+  VERIFY_RAISES_ASSERT(construct_at_boundary<Vector2d>(8));
+  VERIFY_RAISES_ASSERT(construct_at_boundary<Vector4d>(8));
+  VERIFY_RAISES_ASSERT(construct_at_boundary<Matrix2d>(8));
+  VERIFY_RAISES_ASSERT(construct_at_boundary<Matrix4d>(8));
+  VERIFY_RAISES_ASSERT(construct_at_boundary<Vector2cf>(8));
+  VERIFY_RAISES_ASSERT(construct_at_boundary<Vector2cd>(8));
+#endif
+}
+
+void test_unalignedassert()
+{
+  CALL_SUBTEST(unalignedassert());
+}