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diff --git a/test-suite/bugs/closed/4588.v b/test-suite/bugs/closed/4588.v
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+Set Primitive Projections.
+
+(* This proof was accepted in Coq 8.5 because the subterm specs were not
+projected correctly *)
+Inductive foo : Prop := mkfoo { proj1 : False -> foo; proj2 : (forall P : Prop, P -> P) }.
+
+Fail Fixpoint loop (x : foo) : False :=
+  loop (proj2 x _ x).
+
+Fail Definition bad : False := loop (mkfoo (fun x => match x with end) (fun _ x => x)).