diff --git a/test/array_for_matrix.cpp b/test/array_for_matrix.cpp
index b872139..3dc5dc4 100644
--- a/test/array_for_matrix.cpp
+++ b/test/array_for_matrix.cpp
@@ -11,7 +11,6 @@
 
 template<typename MatrixType> void array_for_matrix(const MatrixType& m)
 {
-  typedef typename MatrixType::Index Index;
   typedef typename MatrixType::Scalar Scalar;
   typedef Matrix<Scalar, MatrixType::RowsAtCompileTime, 1> ColVectorType;
   typedef Matrix<Scalar, 1, MatrixType::ColsAtCompileTime> RowVectorType; 
@@ -83,7 +82,6 @@
 template<typename MatrixType> void comparisons(const MatrixType& m)
 {
   using std::abs;
-  typedef typename MatrixType::Index Index;
   typedef typename MatrixType::Scalar Scalar;
   typedef typename NumTraits<Scalar>::Real RealScalar;
 
@@ -140,7 +138,7 @@
   RealScalar a = m1.cwiseAbs().mean();
   VERIFY( ((m1.array()<-a).matrix() || (m1.array()>a).matrix()).count() == (m1.cwiseAbs().array()>a).count());
 
-  typedef Matrix<typename MatrixType::Index, Dynamic, 1> VectorOfIndices;
+  typedef Matrix<Index, Dynamic, 1> VectorOfIndices;
 
   // TODO allows colwise/rowwise for array
   VERIFY_IS_APPROX(((m1.array().abs()+1)>RealScalar(0.1)).matrix().colwise().count(), VectorOfIndices::Constant(cols,rows).transpose());
@@ -172,7 +170,6 @@
 
 template<typename MatrixType> void cwise_min_max(const MatrixType& m)
 {
-  typedef typename MatrixType::Index Index;
   typedef typename MatrixType::Scalar Scalar;
 
   Index rows = m.rows();
@@ -211,7 +208,6 @@
 
 template<typename MatrixTraits> void resize(const MatrixTraits& t)
 {
-  typedef typename MatrixTraits::Index Index;
   typedef typename MatrixTraits::Scalar Scalar;
   typedef Matrix<Scalar,Dynamic,Dynamic> MatrixType;
   typedef Array<Scalar,Dynamic,Dynamic> Array2DType;