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diff --git a/ci/simple-tests/omit_test.v b/ci/simple-tests/omit_test.v
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+
+Definition classical_logic : Prop := forall(P : Prop), ~~P -> P.
+
+(* automatic test marker 1 *)
+
+Lemma classic_excluded_middle :
+  (forall(P : Prop), P \/ ~ P) -> classical_logic.
+Proof.
+  intros H P H0.
+  (* automatic test marker 2 *)
+  specialize (H P).
+Abort.
+
+Lemma classic_excluded_middle :
+  (forall(P : Prop), P \/ ~ P) -> classical_logic.
+Proof using.
+  intros H P H0.
+  specialize (H P).
+  (* automatic test marker 3 *)
+  destruct H.
+    trivial.
+  contradiction.
+Qed.
+
+(* automatic test marker 4 *)