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diff --git a/test-suite/modules/subtyping.v b/test-suite/modules/subtyping.v
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+(* Non regression for bug #1302 *)
+
+(* With universe polymorphism for inductive types, subtyping of
+   inductive types needs a special treatment: the standard conversion
+   algorithm does not work as it only knows to deal with constraints of
+   the form alpha = beta or max(alphas, alphas+1) <= beta, while
+   subtyping of inductive types in Type generates constraints of the form
+   max(alphas, alphas+1) <= max(betas, betas+1).
+
+   These constraints are anyway valid by monotonicity of subtyping but we
+   have to detect it early enough to avoid breaking the standard
+   algorithm for constraints on algebraic universes. *)
+
+Module Type T.
+
+ Parameter A : Type (* Top.1 *) .
+
+ Inductive L : Type (* max(Top.1,1) *) := 
+ | L0
+ | L1 :  (A -> Prop) -> L.
+
+End T.
+
+Axiom Tp : Type (* Top.5 *) .
+
+Module TT : T. 
+
+ Definition A : Type (* Top.6 *) := Tp. (* generates Top.5 <= Top.6 *)
+
+ Inductive L : Type (* max(Top.6,1) *) := 
+ | L0
+ | L1 :  (A -> Prop) -> L.
+
+End TT. (* Generates Top.6 <= Top.1 (+ auxiliary constraints for L_rect) *)
+
+(* Note: Top.6 <= Top.1 is generated by subtyping on A; 
+   subtyping of L follows and has not to be checked *)
+
+
+
+(* The same bug as #1302 but for Definition *)
+(* Check that inferred algebraic universes in interfaces are considered *)
+
+Module Type U. Definition A := Type -> Type. End U.
+Module M:U. Definition A := Type -> Type. End M.
+