diff --git a/test/CMakeLists.txt b/test/CMakeLists.txt
index af4fa73e4..ab3ff4795 100644
--- a/test/CMakeLists.txt
+++ b/test/CMakeLists.txt
@@ -292,6 +292,7 @@ ei_add_test(mpl2only)
 ei_add_test(inplace_decomposition)
 ei_add_test(half_float)
 ei_add_test(array_of_string)
+ei_add_test(num_dimensions)
 
 add_executable(bug1213 bug1213.cpp bug1213_main.cpp)
 
diff --git a/test/mapped_matrix.cpp b/test/mapped_matrix.cpp
index b9f36d8d6..7b9e1fe52 100644
--- a/test/mapped_matrix.cpp
+++ b/test/mapped_matrix.cpp
@@ -181,49 +181,6 @@ void map_not_aligned_on_scalar()
   internal::aligned_delete(array1, (size+1)*(size+1)+1);
 }
 
-#if EIGEN_HAS_CXX11
-template<template <typename,int,int> class Object>
-void map_num_dimensions()
-{
-  typedef Object<double, 1, 1> ArrayScalarType;
-  typedef Object<double, 2, 1> ArrayVectorType;
-  typedef Object<double, 1, 2> TransposeArrayVectorType;
-  typedef Object<double, 2, 2> ArrayType;
-  typedef Object<double, Eigen::Dynamic, 1> DynamicArrayVectorType;
-  typedef Object<double, 1, Eigen::Dynamic> DynamicTransposeArrayVectorType;
-  typedef Object<double, Eigen::Dynamic, Eigen::Dynamic> DynamicArrayType;
-
-  STATIC_CHECK(ArrayScalarType::NumDimensions == 0);
-  STATIC_CHECK(ArrayVectorType::NumDimensions == 1);
-  STATIC_CHECK(TransposeArrayVectorType::NumDimensions == 1);
-  STATIC_CHECK(ArrayType::NumDimensions == 2);
-  STATIC_CHECK(DynamicArrayVectorType::NumDimensions == 1);
-  STATIC_CHECK(DynamicTransposeArrayVectorType::NumDimensions == 1);
-  STATIC_CHECK(DynamicArrayType::NumDimensions == 2);
-
-  typedef Eigen::Map<ArrayScalarType> ArrayScalarMap;
-  typedef Eigen::Map<ArrayVectorType> ArrayVectorMap;
-  typedef Eigen::Map<TransposeArrayVectorType> TransposeArrayVectorMap;
-  typedef Eigen::Map<ArrayType> ArrayMap;
-  typedef Eigen::Map<DynamicArrayVectorType> DynamicArrayVectorMap;
-  typedef Eigen::Map<DynamicTransposeArrayVectorType> DynamicTransposeArrayVectorMap;
-  typedef Eigen::Map<DynamicArrayType> DynamicArrayMap;
-
-  STATIC_CHECK(ArrayScalarMap::NumDimensions == 0);
-  STATIC_CHECK(ArrayVectorMap::NumDimensions == 1);
-  STATIC_CHECK(TransposeArrayVectorMap::NumDimensions == 1);
-  STATIC_CHECK(ArrayMap::NumDimensions == 2);
-  STATIC_CHECK(DynamicArrayVectorMap::NumDimensions == 1);
-  STATIC_CHECK(DynamicTransposeArrayVectorMap::NumDimensions == 1);
-  STATIC_CHECK(DynamicArrayMap::NumDimensions == 2);
-}
-
-template<typename Scalar, int Rows, int Cols>
-using TArray = Array<Scalar,Rows,Cols>;
-template<typename Scalar, int Rows, int Cols>
-using TMatrix = Matrix<Scalar,Rows,Cols>;
-#endif
-
 void test_mapped_matrix()
 {
   for(int i = 0; i < g_repeat; i++) {
@@ -250,9 +207,4 @@ void test_mapped_matrix()
     CALL_SUBTEST_10( map_static_methods(VectorXf(12)) );
     CALL_SUBTEST_11( map_not_aligned_on_scalar<double>() );
   }
-
-  #if EIGEN_HAS_CXX11
-    CALL_SUBTEST_12( map_num_dimensions<TArray>() );
-    CALL_SUBTEST_12( map_num_dimensions<TMatrix>() );
-  #endif
 }
diff --git a/test/num_dimensions.cpp b/test/num_dimensions.cpp
new file mode 100644
index 000000000..f5209283d
--- /dev/null
+++ b/test/num_dimensions.cpp
@@ -0,0 +1,90 @@
+// This file is part of Eigen, a lightweight C++ template library
+// for linear algebra.
+//
+// Copyright (C) 2018 Gael Guennebaud <gael.guennebaud@inria.fr>
+//
+// 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"
+#include <Eigen/SparseCore>
+
+template<int ExpectedDim,typename Xpr>
+void check_dim(const Xpr& ) {
+  STATIC_CHECK( Xpr::NumDimensions == ExpectedDim );
+}
+
+#if EIGEN_HAS_CXX11
+template<template <typename,int,int> class Object>
+void map_num_dimensions()
+{
+  typedef Object<double, 1, 1> ArrayScalarType;
+  typedef Object<double, 2, 1> ArrayVectorType;
+  typedef Object<double, 1, 2> TransposeArrayVectorType;
+  typedef Object<double, 2, 2> ArrayType;
+  typedef Object<double, Eigen::Dynamic, 1> DynamicArrayVectorType;
+  typedef Object<double, 1, Eigen::Dynamic> DynamicTransposeArrayVectorType;
+  typedef Object<double, Eigen::Dynamic, Eigen::Dynamic> DynamicArrayType;
+
+  STATIC_CHECK(ArrayScalarType::NumDimensions == 0);
+  STATIC_CHECK(ArrayVectorType::NumDimensions == 1);
+  STATIC_CHECK(TransposeArrayVectorType::NumDimensions == 1);
+  STATIC_CHECK(ArrayType::NumDimensions == 2);
+  STATIC_CHECK(DynamicArrayVectorType::NumDimensions == 1);
+  STATIC_CHECK(DynamicTransposeArrayVectorType::NumDimensions == 1);
+  STATIC_CHECK(DynamicArrayType::NumDimensions == 2);
+
+  typedef Eigen::Map<ArrayScalarType> ArrayScalarMap;
+  typedef Eigen::Map<ArrayVectorType> ArrayVectorMap;
+  typedef Eigen::Map<TransposeArrayVectorType> TransposeArrayVectorMap;
+  typedef Eigen::Map<ArrayType> ArrayMap;
+  typedef Eigen::Map<DynamicArrayVectorType> DynamicArrayVectorMap;
+  typedef Eigen::Map<DynamicTransposeArrayVectorType> DynamicTransposeArrayVectorMap;
+  typedef Eigen::Map<DynamicArrayType> DynamicArrayMap;
+
+  STATIC_CHECK(ArrayScalarMap::NumDimensions == 0);
+  STATIC_CHECK(ArrayVectorMap::NumDimensions == 1);
+  STATIC_CHECK(TransposeArrayVectorMap::NumDimensions == 1);
+  STATIC_CHECK(ArrayMap::NumDimensions == 2);
+  STATIC_CHECK(DynamicArrayVectorMap::NumDimensions == 1);
+  STATIC_CHECK(DynamicTransposeArrayVectorMap::NumDimensions == 1);
+  STATIC_CHECK(DynamicArrayMap::NumDimensions == 2);
+}
+
+template<typename Scalar, int Rows, int Cols>
+using TArray = Array<Scalar,Rows,Cols>;
+
+template<typename Scalar, int Rows, int Cols>
+using TMatrix = Matrix<Scalar,Rows,Cols>;
+
+#endif
+
+void test_num_dimensions()
+{
+  int n = 10;
+  ArrayXXd A(n,n);
+  CALL_SUBTEST( check_dim<2>(A) );
+  CALL_SUBTEST( check_dim<2>(A.block(1,1,2,2)) );
+  CALL_SUBTEST( check_dim<1>(A.col(1)) );
+  CALL_SUBTEST( check_dim<1>(A.row(1)) );
+
+  MatrixXd M(n,n);
+  CALL_SUBTEST( check_dim<0>(M.row(1)*M.col(1)) );
+
+  SparseMatrix<double> S(n,n);
+  CALL_SUBTEST( check_dim<2>(S) );
+  CALL_SUBTEST( check_dim<2>(S.block(1,1,2,2)) );
+  CALL_SUBTEST( check_dim<1>(S.col(1)) );
+  CALL_SUBTEST( check_dim<1>(S.row(1)) );
+
+  SparseVector<double> s(n);
+  CALL_SUBTEST( check_dim<1>(s) );
+  CALL_SUBTEST( check_dim<1>(s.head(2)) );
+  
+
+  #if EIGEN_HAS_CXX11
+  CALL_SUBTEST( map_num_dimensions<TArray>() );
+  CALL_SUBTEST( map_num_dimensions<TMatrix>() );
+  #endif
+}