diff --git a/salut/test/dijkstra-ring/dijkstra_ring_oracle.lus b/salut/test/dijkstra-ring/dijkstra_ring_oracle.lus
index 7a56ea426577d6cf148e0e65a5891b029cd0bf73..504d8601a897ad62433fabd30f79469d2c9c3fec 100644
--- a/salut/test/dijkstra-ring/dijkstra_ring_oracle.lus
+++ b/salut/test/dijkstra-ring/dijkstra_ring_oracle.lus
@@ -37,6 +37,38 @@ let
 ;
          -- compare the cost functions
 tel
+node dijkstra_ring_oracle_debug<<const actions_number:int; const card:int>>(
+  legitimate : bool;
+  ocaml_cost : real;
+  ocaml_enabled : bool^actions_number^card;
+  active : bool^actions_number^card;
+  ocaml_config : state^card;
+  round:bool;
+  round_nb:int;
+)
+returns (ok : bool;
+  lustre_config : state^card;
+  lustre_enabled : bool^actions_number^card;
+  lustre_round:bool;
+  lustre_round_nb:int);
+var
+  lustre_cost:int;
+let
+  lustre_config, lustre_enabled, lustre_round, lustre_round_nb =
+    topology(active -> pre active, -- ignored at the first step
+             ocaml_config -- used at the first step only
+             );
+  lustre_cost = cost(lustre_enabled, lustre_config);
+  ok =     lustre_enabled = ocaml_enabled
+           -- compare the sasa dot interpretation and the salut dot to lustre compilation
+       and lustre_config = ocaml_config
+          -- compare the lustre and the ocaml version of the processes
+       and Lustre::real2int(ocaml_cost) = lustre_cost
+       and round = lustre_round
+       and round_nb = lustre_round_nb
+;
+         -- compare the cost functions
+tel
 
 node _dijkstra_ring_oracle<<const actions_number:int; const card:int>>(
   legitimate : bool;