diff -r 19b6f20e0ea2 -r e3d9bff447ed test/min_cost_flow_test.cc
--- a/test/min_cost_flow_test.cc	Fri Apr 24 12:23:17 2009 +0200
+++ b/test/min_cost_flow_test.cc	Fri Apr 24 12:23:53 2009 +0200
@@ -233,12 +233,7 @@
   {
     typedef int Flow;
     typedef int Cost;
-    // TODO: This typedef should be enabled if the standard maps are
-    // reference maps in the graph concepts (See #190).
-/**/
-    //typedef concepts::Digraph GR;
-    typedef ListDigraph GR;
-/**/
+    typedef concepts::Digraph GR;
     checkConcept< McfClassConcept<GR, Flow, Cost>,
                   NetworkSimplex<GR, Flow, Cost> >();
   }