diff -r 0759d974de81 -r 4add05447ca0 test/bellman_ford_test.cc
--- a/test/bellman_ford_test.cc	Sun Jan 05 22:24:56 2014 +0100
+++ b/test/bellman_ford_test.cc	Tue Apr 14 08:39:40 2015 +0200
@@ -101,6 +101,10 @@
     pp = const_bf_test.negativeCycle();
 
     for (BF::ActiveIt it(const_bf_test); it != INVALID; ++it) {}
+    for (auto n: const_bf_test.activeNodes()) { ::lemon::ignore_unused_variable_warning(n); }
+    for (Digraph::Node n: const_bf_test.activeNodes()) {
+      ::lemon::ignore_unused_variable_warning(n);
+    }
   }
   {
     BF::SetPredMap<concepts::ReadWriteMap<Node,Arc> >