diff --git a/src/proto_alpha/lib_protocol/test/helpers/context.ml b/src/proto_alpha/lib_protocol/test/helpers/context.ml
index 0a8be9e7a..18de74458 100644
--- a/src/proto_alpha/lib_protocol/test/helpers/context.ml
+++ b/src/proto_alpha/lib_protocol/test/helpers/context.ml
@@ -82,6 +82,17 @@ let get_bakers ctxt =
             (fun p -> p.Alpha_services.Delegate.Baking_rights.delegate)
             bakers)
 
+let get_seed_nonce_hash ctxt =
+  let header =
+    match ctxt with
+    | B { header } -> header
+    | I i -> Incremental.header i in
+  match header.protocol_data.contents.seed_nonce_hash with
+  | None -> failwith "Ne committed nonce"
+  | Some hash -> return hash
+
+let get_seed ctxt = Alpha_services.Seed.get rpc_ctxt ctxt
+
 let get_constants b =
   Alpha_services.Constants.all rpc_ctxt b
 
diff --git a/src/proto_alpha/lib_protocol/test/helpers/context.mli b/src/proto_alpha/lib_protocol/test/helpers/context.mli
index 56b4eb27a..673338d2a 100644
--- a/src/proto_alpha/lib_protocol/test/helpers/context.mli
+++ b/src/proto_alpha/lib_protocol/test/helpers/context.mli
@@ -24,6 +24,11 @@ val get_endorser: t -> int -> public_key_hash tzresult Lwt.t
 
 val get_bakers: t -> public_key_hash list tzresult Lwt.t
 
+val get_seed_nonce_hash: t -> Nonce_hash.t tzresult Lwt.t
+
+(** Returns the seed of the cycle to which the block belongs to. *)
+val get_seed: t -> Seed.seed tzresult Lwt.t
+
 (** Returns all the constants of the protocol *)
 val get_constants: t -> Constants.t tzresult Lwt.t
 
diff --git a/src/proto_alpha/lib_protocol/test/helpers/incremental.ml b/src/proto_alpha/lib_protocol/test/helpers/incremental.ml
index 2c63a54ce..13c83327f 100644
--- a/src/proto_alpha/lib_protocol/test/helpers/incremental.ml
+++ b/src/proto_alpha/lib_protocol/test/helpers/incremental.ml
@@ -20,6 +20,7 @@ type t = {
 type incremental = t
 
 let predecessor { predecessor ; _ } = predecessor
+let header st = st.header
 
 let level st = st.header.shell.level
 
diff --git a/src/proto_alpha/lib_protocol/test/helpers/incremental.mli b/src/proto_alpha/lib_protocol/test/helpers/incremental.mli
index de6597905..50e737b31 100644
--- a/src/proto_alpha/lib_protocol/test/helpers/incremental.mli
+++ b/src/proto_alpha/lib_protocol/test/helpers/incremental.mli
@@ -14,6 +14,7 @@ type t
 type incremental = t
 
 val predecessor: incremental -> Block.t
+val header: incremental -> Block_header.t
 
 val level: incremental -> int32