diff --git a/test/test_tools.h b/test/test_tools.h
--- a/test/test_tools.h
+++ b/test/test_tools.h
@@ -19,163 +19,29 @@
 #ifndef LEMON_TEST_TEST_TOOLS_H
 #define LEMON_TEST_TEST_TOOLS_H
 
+///\ingroup misc
+///\file
+///\brief Some utilities to write test programs.
+
 #include <iostream>
-#include <vector>
 
-#include <cstdlib>
-#include <ctime>
+///If \c rc is fail, writes an error message and exits.
 
-#include <lemon/concept_check.h>
-#include <lemon/concepts/digraph.h>
-
-#include <lemon/random.h>
-
-using namespace lemon;
-
-//! \ingroup misc
-//! \file
-//! \brief Some utilities to write test programs.
-
-
-///If \c rc is fail, writes an error message end exit.
-
-///If \c rc is fail, writes an error message end exit.
+///If \c rc is fail, writes an error message and exits.
 ///The error message contains the file name and the line number of the
 ///source code in a standard from, which makes it possible to go there
 ///using good source browsers like e.g. \c emacs.
 ///
 ///For example
 ///\code check(0==1,"This is obviously false.");\endcode will
-///print this (and then exits).
-///\verbatim digraph_test.cc:123: error: This is obviously false. \endverbatim
+///print something like this (and then exits).
+///\verbatim file_name.cc:123: error: This is obviously false. \endverbatim
 ///
-///\todo It should be in \c error.h
+///\todo It should be in \c assert.h
 #define check(rc, msg) \
   if(!(rc)) { \
     std::cerr << __FILE__ ":" << __LINE__ << ": error: " << msg << std::endl; \
     abort(); \
   } else { } \
 
-///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 arcs of the inner circle.
-  std::vector<typename Digraph::Arc> incir;
-  ///Vector containing the arcs of the outer circle.
-  std::vector<typename Digraph::Arc> outcir;
-  ///Vector containing the chord arcs.
-  std::vector<typename Digraph::Arc> chords;
-};
-
-
-
-///Adds a Petersen digraph to \c G.
-
-///Adds a Petersen digraph to \c G.
-///\return The nodes and arcs of the generated digraph.
-
-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 arcs.
-///
-/// Adds to the digraph the reverse pair of all arcs.
-///
-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 digraph.
-///
-///  Checks the bidirectioned Petersen digraph.
-///
-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);
-  }  
-}
-
-///Structure returned by \ref addUPetersen().
-
-///Structure returned by \ref addUPetersen().
-///
-template<class Digraph> struct UPetStruct
-{
-  ///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 arcs of the inner circle.
-  std::vector<typename Digraph::Edge> incir;
-  ///Vector containing the arcs of the outer circle.
-  std::vector<typename Digraph::Edge> outcir;
-  ///Vector containing the chord arcs.
-  std::vector<typename Digraph::Edge> chords;
-};
-
-///Adds a Petersen digraph to the undirected \c G.
-
-///Adds a Petersen digraph to the undirected \c G.
-///\return The nodes and arcs of the generated digraph.
-
-template<typename Digraph>
-UPetStruct<Digraph> addUPetersen(Digraph &G,int num=5)
-{
-  UPetStruct<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)%5]));
-   n.incir.push_back(G.addArc(n.inner[i],n.inner[(i+2)%5]));
- }
- return n;
-}
-
 #endif