diff --git a/plugins/qcheck-stm/src/config.ml b/plugins/qcheck-stm/src/config.ml
index ac6fd680..f3b235ca 100644
--- a/plugins/qcheck-stm/src/config.ml
+++ b/plugins/qcheck-stm/src/config.ml
@@ -6,6 +6,8 @@ type t = {
   context : Context.t;
   sut_core_type : Ppxlib.core_type;
   init_sut : Ppxlib.expression;
+  include_ : string option;
+  protect_call : string option;
 }
 
 let get_sut_type_name config =
@@ -97,6 +99,14 @@ let init path init_sut sut_str =
     let context = List.fold_left add context sigs in
     let* sut_core_type = sut_core_type sut_str
     and* init_sut = init_sut_from_string init_sut in
-    ok (sigs, { context; sut_core_type; init_sut })
+    ok
+      ( sigs,
+        {
+          context;
+          sut_core_type;
+          init_sut;
+          include_ = None;
+          protect_call = None;
+        } )
   with Gospel.Warnings.Error (l, k) ->
     error (Ortac_core.Warnings.GospelError k, l)
diff --git a/plugins/qcheck-stm/src/ortac_qcheck_stm.ml b/plugins/qcheck-stm/src/ortac_qcheck_stm.ml
index 345d4fd0..8fc44854 100644
--- a/plugins/qcheck-stm/src/ortac_qcheck_stm.ml
+++ b/plugins/qcheck-stm/src/ortac_qcheck_stm.ml
@@ -4,14 +4,15 @@ module Ir_of_gospel = Ir_of_gospel
 module Reserr = Reserr
 module Stm_of_ir = Stm_of_ir
 
-let main path init sut include_ output quiet () =
+let main path init sut include_ protect_call output quiet () =
   let open Reserr in
   let fmt = Registration.get_out_formatter output in
   let pp = pp quiet Ppxlib_ast.Pprintast.structure fmt in
   pp
     (let* sigs, config = Config.init path init sut in
      let* ir = Ir_of_gospel.run sigs config in
-     Stm_of_ir.stm include_ config ir)
+     let config = { config with include_; protect_call } in
+     Stm_of_ir.stm config ir)
 
 open Cmdliner
 
@@ -38,6 +39,15 @@ end = struct
              system under test."
           ~docv:"INIT")
 
+  let protect_call =
+    Arg.(
+      value
+      & opt (some string) None
+      & info [ "p"; "protect-call" ] ~docv:"PROTECT_CALL"
+          ~doc:
+            "Protect the call of the QCheck tests with PROTECT_CALL. \
+             PROTECT_CALL should be the name of a function.")
+
   let term =
     let open Registration in
     Term.(
@@ -46,6 +56,7 @@ end = struct
       $ init
       $ sut
       $ include_
+      $ protect_call
       $ output_file
       $ quiet
       $ setup_log)
diff --git a/plugins/qcheck-stm/src/stm_of_ir.ml b/plugins/qcheck-stm/src/stm_of_ir.ml
index 80b56456..8ef17c49 100644
--- a/plugins/qcheck-stm/src/stm_of_ir.ml
+++ b/plugins/qcheck-stm/src/stm_of_ir.ml
@@ -770,7 +770,7 @@ let ghost_functions config =
   in
   aux config []
 
-let stm include_ config ir =
+let stm config ir =
   let open Reserr in
   let* config, ghost_functions = ghost_functions config ir.ghost_functions in
   let warn = [%stri [@@@ocaml.warning "-26-27"]] in
@@ -783,7 +783,7 @@ let stm include_ config ir =
         |> Mod.ident
         |> Incl.mk
         |> pstr_include)
-      include_
+      config.include_
     |> Option.to_list
   in
   let sut = sut_type config in
@@ -841,11 +841,20 @@ let stm include_ config ir =
   let call_tests =
     let loc = Location.none in
     let descr = estring (module_name ^ " STM tests") in
-    [%stri
-      let _ =
+    let expr =
+      [%expr
         QCheck_base_runner.run_tests_main
           (let count = 1000 in
            [ STMTests.agree_test ~count ~name:[%e descr] ])]
+    in
+    let expr =
+      match config.protect_call with
+      | None -> expr
+      | Some f ->
+          pexp_apply (qualify [ "Spec" ] f)
+            [ (Nolabel, efun [ (Nolabel, punit) ] expr) ]
+    in
+    pstr_value Nonrecursive [ value_binding ~pat:ppat_any ~expr ]
   in
   ok
     ([ open_mod module_name ]