diff --git a/ocaml-lsp-server/test/e2e-new/dune b/ocaml-lsp-server/test/e2e-new/dune
index fe4d8b125..62954baec 100644
--- a/ocaml-lsp-server/test/e2e-new/dune
+++ b/ocaml-lsp-server/test/e2e-new/dune
@@ -52,6 +52,7 @@
     for_ppx
     hover_extended
     inlay_hints
+    merlin_call_compatible
     metrics
     semantic_hl_data
     semantic_hl_helpers
diff --git a/ocaml-lsp-server/test/e2e-new/merlin_call_compatible.ml b/ocaml-lsp-server/test/e2e-new/merlin_call_compatible.ml
new file mode 100644
index 000000000..049275302
--- /dev/null
+++ b/ocaml-lsp-server/test/e2e-new/merlin_call_compatible.ml
@@ -0,0 +1,127 @@
+open Test.Import
+
+let call_merlin_compatible client command args result_as_sexp =
+  let uri = DocumentUri.of_path "test.ml" in
+  let params =
+    `Assoc
+      [ ("uri", DocumentUri.yojson_of_t uri)
+      ; ("command", `String command)
+      ; ("args", args)
+      ; ("resultAsSexp", `Bool result_as_sexp)
+      ]
+  in
+  let params = Some (Jsonrpc.Structured.t_of_yojson params) in
+  let req =
+    Lsp.Client_request.UnknownRequest
+      { meth = "ocamllsp/merlinCallCompatible"; params }
+  in
+  Client.request client req
+
+let print_merin_call_compatible result =
+  result |> Yojson.Safe.pretty_to_string ~std:false |> print_endline
+
+let list l = `List (List.map ~f:(fun x -> `String x) l)
+
+let obj l = `Assoc (List.map ~f:(fun (k, v) -> (k, `String v)) l)
+
+let%expect_test "case-analysis on simple example" =
+  let source =
+    {|type t = {a: int * int; b: string}
+let f ({a; b} : t) = assert false|}
+  in
+  let request client =
+    let open Fiber.O in
+    let args = list [ "-start"; "2:9"; "-end"; "2:9" ] in
+    let+ response = call_merlin_compatible client "case-analysis" args false in
+    print_merin_call_compatible response
+  in
+  Helpers.test source request;
+  [%expect
+    {|
+    {
+      "resultAsSexp": false,
+      "result": "{\"class\":\"return\",\"value\":[{\"start\":{\"line\":2,\"col\":8},\"end\":{\"line\":2,\"col\":9}},\"a = (_, _)\"]}"
+    } |}]
+
+let%expect_test "case-analysis on simple example using object instead of args" =
+  let source =
+    {|type t = {a: int * int; b: string}
+let f ({a; b} : t) = assert false|}
+  in
+  let request client =
+    let open Fiber.O in
+    let args = obj [ ("start", "2:9"); ("end", "2:9") ] in
+    let+ response = call_merlin_compatible client "case-analysis" args false in
+    print_merin_call_compatible response
+  in
+  Helpers.test source request;
+  [%expect
+    {|
+    {
+      "resultAsSexp": false,
+      "result": "{\"class\":\"return\",\"value\":[{\"start\":{\"line\":2,\"col\":8},\"end\":{\"line\":2,\"col\":9}},\"a = (_, _)\"]}"
+    } |}]
+
+let%expect_test "case-analysis on empty example" =
+  let source = {||} in
+  let request client =
+    let open Fiber.O in
+    let args = list [ "-start"; "2:9"; "-end"; "2:9" ] in
+    let+ response = call_merlin_compatible client "case-analysis" args false in
+    print_merin_call_compatible response
+  in
+  Helpers.test source request;
+  [%expect
+    {|
+    {
+      "resultAsSexp": false,
+      "result": "{\"class\":\"exception\",\"value\":\"Merlin_analysis.Destruct.Nothing_to_do\"}"
+    } |}]
+
+let%expect_test "case-analysis on simple example with result as sexp" =
+  let source =
+    {|type t = {a: int * int; b: string}
+let f ({a; b} : t) = assert false|}
+  in
+  let request client =
+    let open Fiber.O in
+    let args = list [ "-start"; "2:9"; "-end"; "2:9" ] in
+    let+ response = call_merlin_compatible client "case-analysis" args true in
+    print_merin_call_compatible response
+  in
+  Helpers.test source request;
+  [%expect
+    {|
+    {
+      "resultAsSexp": true,
+      "result": "((assoc) (class . \"return\") (value ((assoc) (start (assoc) (line . 2) (col . 8)) (end (assoc) (line . 2) (col . 9))) \"a = (_, _)\"))"
+    } |}]
+
+let%expect_test "errors: warning is shown" =
+  let source = {|let () = match Some 3 with | None -> ()|} in
+  let request client =
+    let open Fiber.O in
+    let args = list [] in
+    let+ response = call_merlin_compatible client "errors" args false in
+    print_merin_call_compatible response
+  in
+  Helpers.test source request;
+  [%expect
+    {|
+    {
+      "resultAsSexp": false,
+      "result": "{\"class\":\"return\",\"value\":[{\"start\":{\"line\":1,\"col\":9},\"end\":{\"line\":1,\"col\":39},\"type\":\"warning\",\"sub\":[],\"valid\":true,\"message\":\"Warning 8: this pattern-matching is not exhaustive.\\nHere is an example of a case that is not matched:\\nSome _\"}]}"
+    } |}]
+
+let%expect_test "errors: warning is disabled" =
+  let source = {|let () = match Some 3 with | None -> ()|} in
+  let request client =
+    let open Fiber.O in
+    let args = list [ "-w"; "-8" ] in
+    let+ response = call_merlin_compatible client "errors" args false in
+    print_merin_call_compatible response
+  in
+  Helpers.test source request;
+  [%expect
+    {|
+    { "resultAsSexp": false, "result": "{\"class\":\"return\",\"value\":[]}" } |}]