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diff --git a/helm/matita/tests/discriminate.ma b/helm/matita/tests/discriminate.ma
index 6cfcea0bb..f873dd8f7 100644
--- a/helm/matita/tests/discriminate.ma
+++ b/helm/matita/tests/discriminate.ma
@@ -18,10 +18,23 @@ alias id "not" = "cic:/Coq/Init/Logic/not.con".
 alias num (instance 0) = "natural number".
 alias symbol "eq" (instance 0) = "Coq's leibnitz's equality".
 
+inductive foo: Prop \def I_foo: foo.
 
 theorem stupid:
   1 = 0 \to (\forall p:Prop. p \to not p).
   intros.
+  generalize in match I_foo.
   discriminate H.
-  qed.
-  
+qed.
+
+inductive bar_list (A:Set): Set \def
+  | bar_nil: bar_list A
+  | bar_cons: A \to bar_list A \to bar_list A.
+
+alias id "False" = "cic:/Coq/Init/Logic/False.ind#xpointer(1/1)".
+theorem stupid2:
+  \forall A:Set.\forall x:A.\forall l:bar_list A.
+  bar_nil A = bar_cons A x l \to False.
+  intros.
+  discriminate H.
+qed.