diff --git a/src/proto_alpha/lib_protocol/test/unit/test_sc_rollup_inbox.ml b/src/proto_alpha/lib_protocol/test/unit/test_sc_rollup_inbox.ml
index 727a608306e8f7b1a82890af26aa14650a5576a8..d7289e4e6168e06312f86edd1a6db4d21a0f9c0c 100644
--- a/src/proto_alpha/lib_protocol/test/unit/test_sc_rollup_inbox.ml
+++ b/src/proto_alpha/lib_protocol/test/unit/test_sc_rollup_inbox.ml
@@ -872,7 +872,7 @@ let tests =
     Tztest.tztest_qcheck2
       ~name:"An empty inbox is still able to produce proofs that return None"
       QCheck2.Gen.(
-        let* n = 0 -- 2000 in
+        let* n = 1 -- 2000 in
         let* m = 0 -- 1000 in
         return (level_of_int n, Z.of_int m))
       test_empty_inbox_proof;