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diff --git a/test-suite/bugs/closed/4420.v b/test-suite/bugs/closed/4420.v
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+Module foo.
+  Context (Char : Type).
+  Axiom foo : Type -> Type.
+  Goal foo Char = foo Char.
+    change foo with (fun x => foo x).
+    cbv beta.
+    reflexivity.
+  Defined. 
+End foo.
+
+Inductive foo (A : Type) : Prop := I. (*Top.1*)
+Lemma bar : foo Type. (*Top.3*)
+Proof.
+  Set Printing Universes.
+change foo with (fun x : Type => foo x). (*Top.4*)
+cbv beta.
+apply I. (* I Type@{Top.3} : (fun x : Type@{Top.4} => foo x) Type@{Top.3} *)
+Defined.
+