diff --git a/compiler/tests-compiler/gh1051.ml b/compiler/tests-compiler/gh1051.ml
index 923a29ae35..02045f8072 100644
--- a/compiler/tests-compiler/gh1051.ml
+++ b/compiler/tests-compiler/gh1051.ml
@@ -23,7 +23,9 @@ let prog = {|let () = Printf.printf "%nx" 0xffffffffn;;|}
 
 let%expect_test _ =
   Util.compile_and_run ~skip_modern:true prog;
-  [%expect {|
+  [%expect
+    {|
+Warning: integer overflow: integer 0xffffffff (4294967295) truncated to 0xffffffff (-1); the generated code might be incorrect.
 ffffffff |}];
   ()
 
@@ -31,6 +33,7 @@ let%expect_test _ =
   Util.print_fun_decl (Util.compile_and_parse prog) None;
   [%expect
     {|
+    Warning: integer overflow: integer 0xffffffff (4294967295) truncated to 0xffffffff (-1); the generated code might be incorrect.
     function caml_call2(f, a0, a1){
      return (f.l >= 0 ? f.l : f.l = f.length) == 2
              ? f(a0, a1)