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diff --git a/eigen/unsupported/test/minres.cpp b/eigen/unsupported/test/minres.cpp
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+// This file is part of Eigen, a lightweight C++ template library
+// for linear algebra.
+//
+// Copyright (C) 2011 Gael Guennebaud <g.gael@free.fr>
+// Copyright (C) 2012 Giacomo Po <gpo@ucla.edu>
+//
+// 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 <cmath>
+
+#include "../../test/sparse_solver.h"
+#include <Eigen/IterativeSolvers>
+
+template<typename T> void test_minres_T()
+{
+  MINRES<SparseMatrix<T>, Lower|Upper, DiagonalPreconditioner<T> > minres_colmajor_diag;
+  MINRES<SparseMatrix<T>, Lower, IdentityPreconditioner    > minres_colmajor_lower_I;
+  MINRES<SparseMatrix<T>, Upper, IdentityPreconditioner    > minres_colmajor_upper_I;
+//  MINRES<SparseMatrix<T>, Lower, IncompleteLUT<T> >           minres_colmajor_ilut;
+  //minres<SparseMatrix<T>, SSORPreconditioner<T> >     minres_colmajor_ssor;
+
+
+//   CALL_SUBTEST( check_sparse_square_solving(minres_colmajor_diag)  );
+ // CALL_SUBTEST( check_sparse_square_solving(minres_colmajor_ilut)     );
+  //CALL_SUBTEST( check_sparse_square_solving(minres_colmajor_ssor)     );
+
+  // Diagonal preconditioner
+  MINRES<SparseMatrix<T>, Lower, DiagonalPreconditioner<T> > minres_colmajor_lower_diag;
+  MINRES<SparseMatrix<T>, Upper, DiagonalPreconditioner<T> > minres_colmajor_upper_diag;
+  MINRES<SparseMatrix<T>, Upper|Lower, DiagonalPreconditioner<T> > minres_colmajor_uplo_diag;
+  
+  // call tests for SPD matrix
+  CALL_SUBTEST( check_sparse_spd_solving(minres_colmajor_lower_I) );
+  CALL_SUBTEST( check_sparse_spd_solving(minres_colmajor_upper_I) );
+    
+  CALL_SUBTEST( check_sparse_spd_solving(minres_colmajor_lower_diag)  );
+  CALL_SUBTEST( check_sparse_spd_solving(minres_colmajor_upper_diag)  );
+//   CALL_SUBTEST( check_sparse_spd_solving(minres_colmajor_uplo_diag)  );
+    
+  // TO DO: symmetric semi-definite matrix
+  // TO DO: symmetric indefinite matrix
+}
+
+void test_minres()
+{
+  CALL_SUBTEST_1(test_minres_T<double>());
+//  CALL_SUBTEST_2(test_minres_T<std::complex<double> >());
+}