diff --git a/test/digraph_test.h b/test/digraph_test.h
deleted file mode 100644
--- a/test/digraph_test.h
+++ /dev/null
@@ -1,188 +0,0 @@
-/* -*- C++ -*-
- *
- * This file is a part of LEMON, a generic C++ optimization library
- *
- * Copyright (C) 2003-2008
- * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport
- * (Egervary Research Group on Combinatorial Optimization, EGRES).
- *
- * Permission to use, modify and distribute this software is granted
- * provided that this copyright notice appears in all copies. For
- * precise terms see the accompanying LICENSE file.
- *
- * This software is provided "AS IS" with no warranty of any kind,
- * express or implied, and with no claim as to its suitability for any
- * purpose.
- *
- */
-
-#ifndef LEMON_TEST_GRAPH_TEST_H
-#define LEMON_TEST_GRAPH_TEST_H
-
-//#include <lemon/graph_utils.h>
-#include "test_tools.h"
-
-//! \ingroup misc
-//! \file
-//! \brief Some utility and test cases to test digraph classes.
-namespace lemon {
-
-  ///Structure returned by \ref addPetersen().
-
-  ///Structure returned by \ref addPetersen().
-  ///
-  template<class Digraph> 
-  struct PetStruct
-  {
-    ///Vector containing the outer nodes.
-    std::vector<typename Digraph::Node> outer;
-    ///Vector containing the inner nodes.
-    std::vector<typename Digraph::Node> inner;
-    ///Vector containing the edges of the inner circle.
-    std::vector<typename Digraph::Arc> incir;
-    ///Vector containing the edges of the outer circle.
-    std::vector<typename Digraph::Arc> outcir;
-    ///Vector containing the chord edges.
-    std::vector<typename Digraph::Arc> chords;
-  };
-
-
-
-  ///Adds a Petersen graph to \c G.
-
-  ///Adds a Petersen graph to \c G.
-  ///\return The nodes and edges of the generated graph.
-
-  template<typename Digraph>
-  PetStruct<Digraph> addPetersen(Digraph &G,int num = 5)
-  {
-    PetStruct<Digraph> n;
-
-    for(int i=0;i<num;i++) {
-      n.outer.push_back(G.addNode());
-      n.inner.push_back(G.addNode());
-    }
-
-    for(int i=0;i<num;i++) {
-      n.chords.push_back(G.addArc(n.outer[i],n.inner[i]));
-      n.outcir.push_back(G.addArc(n.outer[i],n.outer[(i+1) % num]));
-      n.incir.push_back(G.addArc(n.inner[i],n.inner[(i+2) % num]));
-    }
-    return n;
-  }
-
-  /// \brief Adds to the digraph the reverse pair of all edges.
-  ///
-  /// Adds to the digraph the reverse pair of all edges.
-  ///
-  template<class Digraph> 
-  void bidirDigraph(Digraph &G)
-  {
-    typedef typename Digraph::Arc Arc;
-    typedef typename Digraph::ArcIt ArcIt;
-  
-    std::vector<Arc> ee;
-  
-    for(ArcIt e(G);e!=INVALID;++e) ee.push_back(e);
-
-    for(typename std::vector<Arc>::iterator p=ee.begin();p!=ee.end();p++)
-      G.addArc(G.target(*p),G.source(*p));
-  }
-
-
-  /// \brief Checks the bidirectioned Petersen graph.
-  ///
-  ///  Checks the bidirectioned Petersen graph.
-  ///
-  template<class Digraph> 
-  void checkBidirPetersen(Digraph &G, int num = 5)
-  {
-    typedef typename Digraph::Node Node;
-
-    typedef typename Digraph::ArcIt ArcIt;
-    typedef typename Digraph::NodeIt NodeIt;
-
-    checkDigraphNodeList(G, 2 * num);
-    checkDigraphArcList(G, 6 * num);
-
-    for(NodeIt n(G);n!=INVALID;++n) {
-      checkDigraphInArcList(G, n, 3);
-      checkDigraphOutArcList(G, n, 3);
-    }  
-  }
-
-  template<class Digraph> void checkDigraphNodeList(Digraph &G, int nn)
-  {
-    typename Digraph::NodeIt n(G);
-    for(int i=0;i<nn;i++) {
-      check(n!=INVALID,"Wrong Node list linking.");
-      ++n;
-    }
-    check(n==INVALID,"Wrong Node list linking.");
-  }
-
-  template<class Digraph>
-  void checkDigraphArcList(Digraph &G, int nn)
-  {
-    typedef typename Digraph::ArcIt ArcIt;
-
-    ArcIt e(G);
-    for(int i=0;i<nn;i++) {
-      check(e!=INVALID,"Wrong Arc list linking.");
-      ++e;
-    }
-    check(e==INVALID,"Wrong Arc list linking.");
-  }
-
-  template<class Digraph> 
-  void checkDigraphOutArcList(Digraph &G, typename Digraph::Node n, int nn)
-  {
-    typename Digraph::OutArcIt e(G,n);
-    for(int i=0;i<nn;i++) {
-      check(e!=INVALID,"Wrong OutArc list linking.");
-      check(n==G.source(e), "Wrong OutArc list linking.");
-      ++e;
-    }
-    check(e==INVALID,"Wrong OutArc list linking.");
-  }
-
-  template<class Digraph> void 
-  checkDigraphInArcList(Digraph &G, typename Digraph::Node n, int nn)
-  {
-    typename Digraph::InArcIt e(G,n);
-    for(int i=0;i<nn;i++) {
-      check(e!=INVALID,"Wrong InArc list linking.");
-      check(n==G.target(e), "Wrong InArc list linking.");
-      ++e;
-    }
-    check(e==INVALID,"Wrong InArc list linking.");
-  }
-
-  template <class Digraph> 
-  void checkDigraph() {
-    const int num = 5;
-    Digraph G;
-    addPetersen(G, num);
-    bidirDigraph(G);
-    checkBidirPetersen(G, num);
-  }
-
-  template <class Digraph> 
-  void checkDigraphIterators(const Digraph& digraph) {
-    typedef typename Digraph::Node Node;
-    typedef typename Digraph::NodeIt NodeIt;
-    typedef typename Digraph::Arc Arc;
-    typedef typename Digraph::ArcIt ArcIt;
-    typedef typename Digraph::InArcIt InArcIt;
-    typedef typename Digraph::OutArcIt OutArcIt;
-    //    typedef ConArcIt<Digraph> ConArcIt;
-  }
-
-  ///\file
-  ///\todo Check target(), source() as well;
-
-  
-} //namespace lemon
-
-
-#endif