diff --git a/tezt/lib_tezos/node.ml b/tezt/lib_tezos/node.ml
index 0f7ba0178b23ce952a467b820c40a4ee1e84ec87..75b1447b708778daf15ea5f9ed5a6d2f0e722f69 100644
--- a/tezt/lib_tezos/node.ml
+++ b/tezt/lib_tezos/node.ml
@@ -462,6 +462,22 @@ module Config_file = struct
         ("sandboxed_chain_name", `String "SANDBOXED_TEZOS");
       ]
 
+  let seoulnet_network_config : JSON.u =
+    `O
+      [
+        ( "genesis",
+          mk_genesis
+            ~timestamp:"2025-07-11T08:00:00Z"
+            ~block:"BLQGRyv3v92oE9iM4BGWwWpy6NxcDFPb7NLsNeuRVr3TYidU7MC"
+            ~protocol:"Ps9mPmXaRzmzk35gbAYNCAw6UXdE2qoABTHbN2oEEc1qM7CwT9P" );
+        ( "genesis_parameters",
+          mk_genesis_parameters
+            ~genesis_pubkey:
+              "edpktosVHk2f3Yrz9Jb6rMrk6uVy4sTxVhP2iyF39AdgzvsTWgbaLy" );
+        ("chain_name", `String "TEZOS_SEOULNET_2025-07-11T08:00:00Z");
+        ("sandboxed_chain_name", `String "SANDBOXED_TEZOS");
+      ]
+
   (* Copied from Octez_node_config.Config_file *)
   let mainnet_network_config : JSON.u =
     `O
@@ -583,6 +599,11 @@ module Config_file = struct
     set_network
       ?user_activated_upgrades
       ("set_rionet_network", rionet_network_config)
+
+  let set_seoulnet_network ?user_activated_upgrades () =
+    set_network
+      ?user_activated_upgrades
+      ("set_seoulnet_network", seoulnet_network_config)
 end
 
 type snapshot_history_mode = Rolling_history | Full_history
diff --git a/tezt/lib_tezos/node.mli b/tezt/lib_tezos/node.mli
index 4a35b0e6f4dde0f48a6f0860a91c1dd2cd884585..d018fc21c3685407de366fbdb111cffe3b1c04bb 100644
--- a/tezt/lib_tezos/node.mli
+++ b/tezt/lib_tezos/node.mli
@@ -453,6 +453,12 @@ module Config_file : sig
       [user_activated_upgrades] can be given to add user-activated upgrades. *)
   val set_rionet_network :
     ?user_activated_upgrades:(int * Protocol.t) list -> unit -> JSON.t -> JSON.t
+
+  (** Set the network config to a Seoulnet network.
+
+      [user_activated_upgrades] can be given to add user-activated upgrades. *)
+  val set_seoulnet_network :
+    ?user_activated_upgrades:(int * Protocol.t) list -> unit -> JSON.t -> JSON.t
 end
 
 (** Same as [config_init], but do not wait for the process to exit. *)
diff --git a/tezt/tests/cloud/dal.ml b/tezt/tests/cloud/dal.ml
index 9d1bac2d25a4ae150487b88777debd8f128dccd8..f83d193f3116de450c13b201a29183e920d1d6de 100644
--- a/tezt/tests/cloud/dal.ml
+++ b/tezt/tests/cloud/dal.ml
@@ -193,6 +193,7 @@ module Node = struct
     (match JSON.(json |-> "snapshot_header" |-> "chain_name" |> as_string) with
     | "TEZOS_ITHACANET_2022-01-25T15:00:00Z" -> "ghostnet"
     | "TEZOS_RIONET_2025-02-19T12:45:00Z" -> "rionet"
+    | "TEZOS_SEOULNET_2025-07-11T08:00:00Z" -> "seoulnet"
     | "TEZOS_MAINNET" -> "mainnet"
     | "TEZOS" | _ -> "sandbox")
     |> Lwt.return
@@ -374,6 +375,7 @@ module Node = struct
                 | Some "mainnet" -> Node.Config_file.set_mainnet_network ()
                 | Some "ghostnet" -> Node.Config_file.set_ghostnet_network ()
                 | Some "rionet" -> Node.Config_file.set_rionet_network ()
+                | Some "seoulnet" -> Node.Config_file.set_seoulnet_network ()
                 | _ -> Node.Config_file.set_sandbox_network)
             in
             let* () =
@@ -1335,7 +1337,7 @@ module Monitoring_app = struct
         "https://gitlab.com/tezos/tezos/-/raw/master/tezt/lib_cloud/assets/mainnet.png"
     | `Ghostnet ->
         "https://gitlab.com/tezos/tezos/-/raw/master/tezt/lib_cloud/assets/ghostnet.png"
-    | `Nextnet _ ->
+    | `Nextnet _ | `Seoulnet ->
         "https://gitlab.com/tezos/tezos/-/raw/master/tezt/lib_cloud/assets/seoulnet.png"
     | `Sandbox | `Weeklynet _ -> "no_image_yet"
 
@@ -4762,7 +4764,7 @@ let parse_stake_arg ~stake_arg ~simulation_arg =
       | Mimic {network; max_nb_bakers} ->
           let network_string =
             match network with
-            | `Mainnet | `Ghostnet | `Rionet -> to_string network
+            | `Mainnet | `Ghostnet | `Rionet | `Seoulnet -> to_string network
             | _ ->
                 failwith
                   (Format.sprintf
diff --git a/tezt/tests/cloud/network.ml b/tezt/tests/cloud/network.ml
index c603b29f248305938f8ee9439d7ea9a413d64974..d9e6c7c2ab2ad67325ae4b08951668f8a54f2ac4 100644
--- a/tezt/tests/cloud/network.ml
+++ b/tezt/tests/cloud/network.ml
@@ -6,7 +6,12 @@
 (*****************************************************************************)
 
 type public =
-  [`Mainnet | `Ghostnet | `Nextnet of string | `Weeklynet of string | `Rionet]
+  [ `Mainnet
+  | `Ghostnet
+  | `Nextnet of string
+  | `Weeklynet of string
+  | `Rionet
+  | `Seoulnet ]
 
 type t = [public | `Sandbox]
 
@@ -25,6 +30,7 @@ let to_string = function
   | `Weeklynet date -> sf "weeklynet-%s" date
   | `Sandbox -> "sandbox"
   | `Rionet -> "rionet"
+  | `Seoulnet -> "seoulnet"
 
 let default_protocol : t -> Protocol.t = function
   | `Mainnet -> R022
@@ -33,6 +39,7 @@ let default_protocol : t -> Protocol.t = function
   | `Sandbox -> Alpha
   | `Nextnet _ -> S023
   | `Rionet -> R022
+  | `Seoulnet -> S023
 
 let public_rpc_endpoint testnet =
   Endpoint.make
@@ -43,7 +50,8 @@ let public_rpc_endpoint testnet =
       | `Ghostnet -> "rpc.ghostnet.teztnets.com"
       | `Nextnet date -> sf "rpc.nextnet-%s.teztnets.com" date
       | `Weeklynet date -> sf "rpc.weeklynet-%s.teztnets.com" date
-      | `Rionet -> "rpc.rionet.teztnets.com")
+      | `Rionet -> "rpc.rionet.teztnets.com"
+      | `Seoulnet -> "rpc.seoulnet.teztnets.com")
     ~port:443
     ()
 
@@ -53,6 +61,7 @@ let snapshot_service = function
   | `Nextnet _ -> "https://snapshots.eu.tzinit.org/nextnet"
   | `Weeklynet _ -> "https://snapshots.eu.tzinit.org/weeklynet"
   | `Rionet -> "https://snapshots.eu.tzinit.org/rionet"
+  | `Seoulnet -> "https://snapshots.eu.tzinit.org/seoulnet"
 
 (* Argument to give to the --network option of `octez-node config init`. *)
 let to_octez_network_options = function
@@ -61,6 +70,7 @@ let to_octez_network_options = function
   | `Nextnet date -> sf "https://teztnets.com/nextnet-%s" date
   | `Weeklynet date -> sf "https://teztnets.com/weeklynet-%s" date
   | `Rionet -> "https://teztnets.com/rionet"
+  | `Seoulnet -> "https://teztnets.com/seoulnet"
 
 let default_bootstrap = function
   | `Mainnet -> "boot.tzinit.org"
@@ -68,6 +78,7 @@ let default_bootstrap = function
   | `Nextnet date -> sf "nextnet-%s.teztnets.com" date
   | `Weeklynet date -> sf "weeklynet-%s.teztnets.com" date
   | `Rionet -> "rionet.teztnets.com"
+  | `Seoulnet -> "seoulnet.teztnets.com"
 
 let default_dal_bootstrap = function
   | `Mainnet -> "dalboot.mainnet.tzboot.net"
@@ -76,6 +87,7 @@ let default_dal_bootstrap = function
   | `Nextnet date -> sf "dal.nextnet-%s.teztnets.com" date
   | `Weeklynet date -> sf "dal.weeklynet-%s.teztnets.com" date
   | `Rionet -> "dal.rionet.teztnets.com"
+  | `Seoulnet -> "dal.seoulnet.teztnets.com"
 
 let get_level endpoint =
   let* json = RPC_core.call endpoint (RPC.get_chain_block_header_shell ()) in
@@ -122,7 +134,7 @@ let versions network =
           response.code
           (Printexc.to_string exn) ;
         Lwt.return_none)
-  | `Weeklynet _ | `Rionet ->
+  | `Weeklynet _ | `Rionet | `Seoulnet ->
       (* No easy way to get this information. *)
       Lwt.return_some (Hashtbl.create 0)
   | `Sandbox ->
@@ -132,7 +144,7 @@ let versions network =
 
 let delegates ?(accounts = []) network =
   match network with
-  | (`Mainnet | `Ghostnet | `Rionet) as network -> (
+  | (`Mainnet | `Ghostnet | `Rionet | `Seoulnet) as network -> (
       let decoder json =
         json |> JSON.as_list
         |> List.map (fun json_account ->
diff --git a/tezt/tests/cloud/network.mli b/tezt/tests/cloud/network.mli
index bf3d87f3712606088dd6e782818c4a3ed49d9092..de8eee41c36b949e401281e2b515928b15895898 100644
--- a/tezt/tests/cloud/network.mli
+++ b/tezt/tests/cloud/network.mli
@@ -17,7 +17,8 @@ type public =
     (* date of the genesis block of the current weeklynet;
        typically it is last wednesday.
        format is YYYY-MM-DD *)
-  | `Rionet ]
+  | `Rionet
+  | `Seoulnet ]
 
 type t = [public | `Sandbox]
 
@@ -27,7 +28,7 @@ type stake_repartition =
 
 val to_public : t -> public
 
-(** ["mainnet" | "ghostnet" | "rionet" | "nextnet-%s" | "weeklynet-%s" | "sandbox"] *)
+(** ["mainnet" | "ghostnet" | "rionet" | "seoulnet" | "nextnet-%s" | "weeklynet-%s" | "sandbox"] *)
 val to_string : [< t] -> string
 
 (** Known protocol used by the network *)
diff --git a/tezt/tests/cloud/scenarios_cli.ml b/tezt/tests/cloud/scenarios_cli.ml
index 140e9603c145cb05641c2d71bbcf8585d21f7551..ba62df7c4273beb70ca180fd445f1596f60ab26f 100644
--- a/tezt/tests/cloud/scenarios_cli.ml
+++ b/tezt/tests/cloud/scenarios_cli.ml
@@ -227,6 +227,7 @@ module Dal () : Dal = struct
     | "mainnet" -> Some `Mainnet
     | "ghostnet" -> Some `Ghostnet
     | "rionet" -> Some `Rionet
+    | "seoulnet" -> Some `Seoulnet
     | s when String.length s = 20 && String.sub s 0 10 = "weeklynet-" ->
         (* format:  weeklynet-2025-01-29 (with dashes) *)
         let date = String.sub s 10 10 in