diff --git a/src/test/contracts/id.ligo b/src/test/contracts/id.ligo
new file mode 100644
index 000000000..ec4d3c1ca
--- /dev/null
+++ b/src/test/contracts/id.ligo
@@ -0,0 +1,178 @@
+type id is int
+
+type id_details is
+  record [
+    owner: address;
+    controller: address;
+    profile: bytes;
+  ]
+
+type buy is
+  record [
+    profile: bytes;
+    initial_controller: option(address);
+  ]
+
+type update_owner is
+  record [
+    id: id;
+    new_owner: address;
+  ]
+
+type update_details is
+  record [
+    id: id;
+    new_profile: option(bytes);
+    new_controller: option(address);
+  ]
+
+type action is
+  | Buy of buy
+  | Update_owner of update_owner
+  | Update_details of update_details
+  | Skip of unit
+
+(* The prices kept in storage can be changed by bakers, though they should only be
+   adjusted down over time, not up. *)
+type storage is
+  record [
+    identities: big_map (id, id_details);
+    next_id: int;
+    name_price: tez;
+    skip_price: tez;
+  ]
+
+(** Preliminary thoughts on ids:
+
+I very much like the simplicity of http://gurno.com/adam/mne/.
+5 three letter words means you have a 15 character identity, not actually more
+annoying than an IP address and a lot more memorable than the raw digits. This
+can be stored as a single integer which is then translated into the corresponding
+series of 5 words.
+
+I in general like the idea of having a 'skip' mechanism, but it does need to cost
+something so people don't eat up the address space. 256 ^ 5 means you have a lot
+of address space, but if people troll by skipping a lot that could be eaten up.
+Should probably do some napkin calculations for how expensive skipping needs to
+be to deter people from doing it just to chew up address space.
+*)
+
+function buy (const parameter : buy; const storage : storage) : list(operation) * storage is
+  begin
+    if amount = storage.name_price
+    then skip
+    else failwith("Incorrect amount paid.");
+    const profile : bytes = parameter.profile;
+    const initial_controller : option(address) = parameter.initial_controller;
+    var identities : big_map (id, id_details) := storage.identities;
+    const new_id : int = storage.next_id;
+    const controller : address =
+      case initial_controller of
+        Some(addr) -> addr
+      | None -> sender
+      end;
+    const new_id_details: id_details =
+      record [
+              owner = sender ;
+              controller = controller ;
+              profile = profile ;
+      ];
+    identities[new_id] := Some(new_id_details);
+  end with ((nil : list(operation)), record [
+                              identities = updated_identities;
+                              next_id = new_id + 1;
+                              name_price = storage.name_price;
+                              skip_price = storage.skip_price;
+                              ])
+
+function update_owner (const parameter : update_owner; const storage : storage) :
+         list(operation) * storage is
+  begin
+    if (amount =/= 0mutez)
+    then
+      begin
+        failwith("Updating owner doesn't cost anything.");
+      end
+    else skip;
+    const id : int = parameter[id];
+    const new_owner : address = parameter[new_owner];
+    var identities : big_map (id, id_details) := storage[identities];
+    const id_details : id_details =
+      case identities[id] of
+        Some(id_details) -> id_details
+      | None -> (failwith("This ID does not exist."): id_details)
+      end;
+    var is_allowed : bool := false;
+    if sender = id_details[owner]
+    then is_allowed := true
+    else failwith("You are not the owner of this ID.");
+    id_details[owner] := new_owner;
+    identities[id] := Some(id_details);
+  end with ((nil: list(operation)), record [
+                                     identities = updated_identities;
+                                     next_id = storage.next_id;
+                                     name_price = storage.name_price;
+                                     skip_price = storage.skip_price;
+                                   ])
+
+function update_details (const parameter : update_details; const storage : storage ) :
+         list(operation) * storage is
+  begin
+    if (amount =/= 0mutez)
+    then failwith("Updating details doesn't cost anything.")
+    else skip;
+    const id : int = parameter[id];
+    const new_profile : option(bytes) = parameter[new_profile];
+    const new_controller : option(address) = parameter[new_controller];
+    const identities : big_map (id, id_details) = storage[identities];
+    const id_details: id_details =
+      case identities[id] of
+        Some(id_details) -> id_details
+      | None -> (failwith("This ID does not exist."): id_details)
+      end;
+    var is_allowed : bool := false;
+    if (sender = current_id_details[controller]) or (sender = current_id_details[owner])
+    then is_allowed := true
+    else failwith("You are not the owner or controller of this ID.");
+    const owner: address = id_details[owner];
+    const profile: bytes =
+      case new_profile of
+        None -> (* Default *) id_details[profile]
+      | Some(new_profile) -> new_profile
+      end;
+    const controller: address =
+    case new_controller of
+      None -> (* Default *) current_id_details[controller]
+    | Some(new_controller) -> new_controller
+    end;
+    id_details[owner] := owner;
+    id_details[controller] := controller;
+    id_details[profile] := profile;
+    identities[id] := Some(id_details);
+  end with ((nil: list(operation)), record [
+                                     identities = identities;
+                                     next_id = storage[next_id];
+                                     name_price = storage[name_price];
+                                     skip_price = storage[skip_price];
+                                    ])
+
+(* Let someone skip the next identity so nobody has to take one that's undesirable *)
+function skip_ (const p: unit; const storage: storage) : list(operation) * storage is
+  begin
+    if amount = storage[skip_price]
+    then skip
+    else failwith("Incorrect amount paid.");
+  end with ((nil: list(operation)), record [
+                                     identities = storage[identities];
+                                     next_id = storage[next_id] + 1;
+                                     name_price = storage[name_price];
+                                     skip_price = storage[skip_price];
+                                   ])
+
+function main (const action : action; const storage : storage) : list(operation) * storage is
+  case action of
+  | Buy(b) -> buy (b, storage)
+  | Update_owner(uo) -> update_owner (uo, storage)
+  | Update_details(ud) -> update_details (ud, storage)
+  | Skip(s) -> skip_ (unit, storage)
+  end;
diff --git a/src/test/id_tests_p.ml b/src/test/id_tests_p.ml
new file mode 100644
index 000000000..ab98a8c95
--- /dev/null
+++ b/src/test/id_tests_p.ml
@@ -0,0 +1,527 @@
+open Trace
+open Test_helpers
+open Ast_simplified
+
+
+let mtype_file f =
+  let%bind simplified  = Ligo.Compile.Of_source.compile f (Syntax_name "pascaligo") in
+  let%bind typed,state = Ligo.Compile.Of_simplified.compile simplified in
+  ok (typed,state)
+
+let get_program =
+  let s = ref None in
+  fun () -> match !s with
+    | Some s -> ok s
+    | None -> (
+        let%bind program = mtype_file "./contracts/id.ligo" in
+        s := Some program ;
+        ok program
+      )
+
+let compile_main () =
+  let%bind simplified      = Ligo.Compile.Of_source.compile "./contracts/id.ligo" (Syntax_name "pascaligo") in
+  let%bind typed_prg,_ = Ligo.Compile.Of_simplified.compile simplified in
+  let%bind mini_c_prg      = Ligo.Compile.Of_typed.compile typed_prg in
+  let%bind michelson_prg   = Ligo.Compile.Of_mini_c.aggregate_and_compile_contract mini_c_prg "main" in
+  let%bind (_contract: Tezos_utils.Michelson.michelson) =
+    (* fails if the given entry point is not a valid contract *)
+    Ligo.Compile.Of_michelson.build_contract michelson_prg in
+  ok ()
+
+let (first_owner , first_contract) =
+  let open Proto_alpha_utils.Memory_proto_alpha in
+  let id = List.nth dummy_environment.identities 0 in
+  let kt = id.implicit_contract in
+  Protocol.Alpha_context.Contract.to_b58check kt , kt
+
+let buy_id () =
+  let%bind program, _ = get_program () in
+  let owner_addr = addr 5 in
+  let owner_website = e_bytes_string "ligolang.org" in
+  let id_details_1 = e_record_ez [("owner", e_address owner_addr) ;
+                                  ("controller", e_address owner_addr) ;
+                                  ("profile", owner_website)]
+  in
+  let storage = e_record_ez [("identities", (e_big_map [(e_int 0, id_details_1)])) ;
+                             ("next_id", e_int 1) ;
+                             ("name_price", e_mutez 1000000) ;
+                             ("skip_price", e_mutez 1000000) ; ]
+  in
+  let new_addr = first_owner in
+  let options = Proto_alpha_utils.Memory_proto_alpha.make_options
+      ~sender:first_contract
+      ~amount:(Memory_proto_alpha.Protocol.Alpha_context.Tez.one) ()
+  in
+  let new_website = e_bytes_string "ligolang.org" in
+  let id_details_2 = e_record_ez [("owner", e_address new_addr) ;
+                                  ("controller", e_address new_addr) ;
+                                  ("profile", new_website)]
+  in
+  let param = e_record_ez [("profile", owner_website) ;
+                           ("initial_controller", (e_some (e_address new_addr))) ;
+                          ] in
+  let new_storage = e_record_ez [("identities", (e_big_map
+                                                   [(e_int 0, id_details_1) ;
+                                                    (e_int 1, id_details_2)])) ;
+                                 ("next_id", e_int 2) ;
+                                 ("name_price", e_mutez 1000000) ;
+                                 ("skip_price", e_mutez 1000000) ; ]
+  in
+  let%bind () = expect_eq ~options program "buy" 
+      (e_pair param storage) 
+      (e_pair (e_list []) new_storage)
+  in ok ()
+
+let buy_id_sender_addr () =
+  let%bind program, _ = get_program () in
+  let owner_addr = addr 5 in
+  let owner_website = e_bytes_string "ligolang.org" in
+  let id_details_1 = e_record_ez [("owner", e_address owner_addr) ;
+                                  ("controller", e_address owner_addr) ;
+                                  ("profile", owner_website)]
+  in
+  let storage = e_record_ez [("identities", (e_big_map [(e_int 0, id_details_1)])) ;
+                             ("next_id", e_int 1) ;
+                             ("name_price", e_mutez 1000000) ;
+                             ("skip_price", e_mutez 1000000) ; ]
+  in
+  let new_addr = first_owner in
+  let options = Proto_alpha_utils.Memory_proto_alpha.make_options
+      ~sender:first_contract
+      ~amount:(Memory_proto_alpha.Protocol.Alpha_context.Tez.one) ()
+  in
+  let new_website = e_bytes_string "ligolang.org" in
+  let id_details_2 = e_record_ez [("owner", e_address new_addr) ;
+                                  ("controller", e_address new_addr) ;
+                                  ("profile", new_website)]
+  in
+  let param = e_record_ez [("profile", owner_website) ;
+                           ("initial_controller", (e_typed_none t_address))] in
+  let new_storage = e_record_ez [("identities", (e_big_map
+                                                   [(e_int 0, id_details_1) ;
+                                                    (e_int 1, id_details_2)])) ;
+                                 ("next_id", e_int 2) ;
+                                 ("name_price", e_mutez 1000000) ;
+                                 ("skip_price", e_mutez 1000000) ; ]
+  in
+  let%bind () = expect_eq ~options program "buy"
+      (e_pair param storage)
+      (e_pair (e_list []) new_storage)
+  in ok ()
+
+(* Test that contract fails if we attempt to buy an ID for the wrong amount *)
+let buy_id_wrong_amount () =
+  let%bind program, _ = get_program () in
+  let owner_addr = addr 5 in
+  let owner_website = e_bytes_string "ligolang.org" in
+  let id_details_1 = e_record_ez [("owner", e_address owner_addr) ;
+                                  ("controller", e_address owner_addr) ;
+                                  ("profile", owner_website)]
+  in
+  let storage = e_record_ez [("identities", (e_big_map [(e_int 0, id_details_1)])) ;
+                             ("next_id", e_int 1) ;
+                             ("name_price", e_mutez 1000000) ;
+                             ("skip_price", e_mutez 1000000) ; ]
+  in
+  let new_addr = first_owner in
+  let options = Proto_alpha_utils.Memory_proto_alpha.make_options
+      ~sender:first_contract
+      ~amount:(Memory_proto_alpha.Protocol.Alpha_context.Tez.fifty_cents) ()
+  in
+  let param = e_record_ez [("profile", owner_website) ;
+                           ("initial_controller", (e_some (e_address new_addr)))] in
+  let%bind () = expect_string_failwith ~options program "buy"
+      (e_pair param storage)
+      "Incorrect amount paid."
+  in ok ()
+
+let update_details_owner () =
+  let%bind program, _ = get_program () in
+  let owner_addr = addr 5 in
+  let owner_website = e_bytes_string "ligolang.org" in
+  let id_details_1 = e_record_ez [("owner", e_address owner_addr) ;
+                                  ("controller", e_address owner_addr) ;
+                                  ("profile", owner_website)]
+  in
+  let new_addr = first_owner in
+  let options = Proto_alpha_utils.Memory_proto_alpha.make_options
+      ~sender:first_contract
+      ~amount:(Memory_proto_alpha.Protocol.Alpha_context.Tez.zero)
+      ()
+  in
+  let new_website = e_bytes_string "ligolang.org" in
+  let id_details_2 = e_record_ez [("owner", e_address new_addr) ;
+                                  ("controller", e_address owner_addr) ;
+                                  ("profile", new_website)]
+  in
+  let id_details_2_diff = e_record_ez [("owner", e_address new_addr) ;
+                                       ("controller", e_address new_addr) ;
+                                       ("profile", new_website)] in
+  let storage = e_record_ez [("identities", (e_big_map
+                                                   [(e_int 0, id_details_1) ;
+                                                    (e_int 1, id_details_2)])) ;
+                                 ("next_id", e_int 2) ;
+                                 ("name_price", e_mutez 1000000) ;
+                                 ("skip_price", e_mutez 1000000) ; ]
+  in
+  let new_storage = e_record_ez [("identities", (e_big_map
+                                                   [(e_int 0, id_details_1) ;
+                                                    (e_int 1, id_details_2_diff)])) ;
+                                 ("next_id", e_int 2) ;
+                                 ("name_price", e_mutez 1000000) ;
+                                 ("skip_price", e_mutez 1000000) ; ]
+  in
+  let details = e_bytes_string "ligolang.org" in
+  let param = e_record_ez [("id", e_int 1) ;
+                       ("new_profile", e_some details) ;
+                       ("new_controller", e_some (e_address new_addr))] in
+  let%bind () = expect_eq ~options program "update_details"
+      (e_pair param storage)
+      (e_pair (e_list []) new_storage)
+  in ok ()
+
+let update_details_controller () =
+  let%bind program, _ = get_program () in
+  let owner_addr = addr 5 in
+  let owner_website = e_bytes_string "ligolang.org" in
+  let id_details_1 = e_record_ez [("owner", e_address owner_addr) ;
+                                  ("controller", e_address owner_addr) ;
+                                  ("profile", owner_website)]
+  in
+  let new_addr = first_owner in
+  let options = Proto_alpha_utils.Memory_proto_alpha.make_options
+      ~sender:first_contract
+      ~amount:(Memory_proto_alpha.Protocol.Alpha_context.Tez.zero)
+      ()
+  in
+  let new_website = e_bytes_string "ligolang.org" in
+  let id_details_2 = e_record_ez [("owner", e_address owner_addr) ;
+                                  ("controller", e_address new_addr) ;
+                                  ("profile", new_website)]
+  in
+  let id_details_2_diff = e_record_ez [("owner", e_address owner_addr) ;
+                                       ("controller", e_address owner_addr) ;
+                                       ("profile", new_website)] in
+  let storage = e_record_ez [("identities", (e_big_map
+                                               [(e_int 0, id_details_1) ;
+                                                (e_int 1, id_details_2)])) ;
+                             ("next_id", e_int 2) ;
+                             ("name_price", e_mutez 1000000) ;
+                             ("skip_price", e_mutez 1000000) ; ]
+  in
+  let new_storage = e_record_ez [("identities", (e_big_map
+                                                   [(e_int 0, id_details_1) ;
+                                                    (e_int 1, id_details_2_diff)])) ;
+                                 ("next_id", e_int 2) ;
+                                 ("name_price", e_mutez 1000000) ;
+                                 ("skip_price", e_mutez 1000000) ; ]
+  in
+  let details = e_bytes_string "ligolang.org" in
+  let param = e_record_ez [("id", e_int 1) ;
+                           ("new_profile", e_some details) ;
+                           ("new_controller", e_some (e_address owner_addr))] in
+  let%bind () = expect_eq ~options program "update_details"
+      (e_pair param storage)
+      (e_pair (e_list []) new_storage)
+  in ok ()
+
+(* Test that contract fails when we attempt to update details of nonexistent ID *)
+let update_details_nonexistent () = 
+  let%bind program, _ = get_program () in
+  let owner_addr = addr 5 in
+  let owner_website = e_bytes_string "ligolang.org" in
+  let id_details_1 = e_record_ez [("owner", e_address owner_addr) ;
+                                  ("controller", e_address owner_addr) ;
+                                  ("profile", owner_website)]
+  in
+  let new_addr = first_owner in
+  let options = Proto_alpha_utils.Memory_proto_alpha.make_options
+      ~sender:first_contract
+      ~amount:(Memory_proto_alpha.Protocol.Alpha_context.Tez.zero)
+      ()
+  in
+  let new_website = e_bytes_string "ligolang.org" in
+  let id_details_2 = e_record_ez [("owner", e_address new_addr) ;
+                                  ("controller", e_address new_addr) ;
+                                  ("profile", new_website)]
+  in
+  let storage = e_record_ez [("identities", (e_big_map
+                                                   [(e_int 0, id_details_1) ;
+                                                    (e_int 1, id_details_2)])) ;
+                                 ("next_id", e_int 2) ;
+                                 ("name_price", e_mutez 1000000) ;
+                                 ("skip_price", e_mutez 1000000) ; ]
+  in
+  let details = e_bytes_string "ligolang.org" in
+  let param = e_record_ez [("id", e_int 2) ;
+                           ("new_profile", e_some details) ;
+                           ("new_controller", e_some (e_address owner_addr))] in
+  let%bind () = expect_string_failwith ~options program "update_details"
+      (e_pair param storage)
+      "This ID does not exist."
+  in ok ()
+
+(* Test that contract fails when we attempt to update details from wrong addr *)
+let update_details_wrong_addr () =
+  let%bind program, _ = get_program () in
+  let owner_addr = addr 5 in
+  let owner_website = e_bytes_string "ligolang.org" in
+  let id_details_1 = e_record_ez [("owner", e_address owner_addr) ;
+                                  ("controller", e_address owner_addr) ;
+                                  ("profile", owner_website)]
+  in
+  let new_addr = first_owner in
+  let options = Proto_alpha_utils.Memory_proto_alpha.make_options
+      ~amount:(Memory_proto_alpha.Protocol.Alpha_context.Tez.zero)
+      ()
+  in
+  let new_website = e_bytes_string "ligolang.org" in
+  let id_details_2 = e_record_ez [("owner", e_address new_addr) ;
+                                  ("controller", e_address new_addr) ;
+                                  ("profile", new_website)]
+  in
+  let storage = e_record_ez [("identities", (e_big_map
+                                                   [(e_int 0, id_details_1) ;
+                                                    (e_int 1, id_details_2)])) ;
+                                 ("next_id", e_int 2) ;
+                                 ("name_price", e_mutez 1000000) ;
+                                 ("skip_price", e_mutez 1000000) ; ]
+  in
+  let details = e_bytes_string "ligolang.org" in
+  let param = e_record_ez [("id", e_int 0) ;
+                           ("new_profile", e_some details) ;
+                           ("new_controller", e_some (e_address owner_addr))] in
+  let%bind () = expect_string_failwith ~options program "update_details"
+      (e_pair param storage)
+      "You are not the owner or controller of this ID."
+  in ok ()
+
+(* Test that giving none on both profile and controller address is a no-op *)
+let update_details_unchanged () =
+  let%bind program, _ = get_program () in
+  let owner_addr = addr 5 in
+  let owner_website = e_bytes_string "ligolang.org" in
+  let id_details_1 = e_record_ez [("owner", e_address owner_addr) ;
+                                  ("controller", e_address owner_addr) ;
+                                  ("profile", owner_website)]
+  in
+  let new_addr = first_owner in
+  let options = Proto_alpha_utils.Memory_proto_alpha.make_options
+      ~sender:first_contract
+      ~amount:(Memory_proto_alpha.Protocol.Alpha_context.Tez.zero)
+      ()
+  in
+  let new_website = e_bytes_string "ligolang.org" in
+  let id_details_2 = e_record_ez [("owner", e_address new_addr) ;
+                                  ("controller", e_address new_addr) ;
+                                  ("profile", new_website)]
+  in
+  let storage = e_record_ez [("identities", (e_big_map
+                                               [(e_int 0, id_details_1) ;
+                                                (e_int 1, id_details_2)])) ;
+                             ("next_id", e_int 2) ;
+                             ("name_price", e_mutez 1000000) ;
+                             ("skip_price", e_mutez 1000000) ; ]
+  in
+  let param = e_record_ez [("id", e_int 1) ;
+                           ("new_profile", e_typed_none t_bytes) ;
+                           ("new_controller", e_typed_none t_address)] in
+  let%bind () = expect_eq ~options program "update_details"
+      (e_pair param storage)
+      (e_pair (e_list []) storage)
+  in ok ()
+
+let update_owner () =
+  let%bind program, _ = get_program () in
+  let owner_addr = addr 5 in
+  let owner_website = e_bytes_string "ligolang.org" in
+  let id_details_1 = e_record_ez [("owner", e_address owner_addr) ;
+                                  ("controller", e_address owner_addr) ;
+                                  ("profile", owner_website)]
+  in
+  let new_addr = first_owner in
+  let options = Proto_alpha_utils.Memory_proto_alpha.make_options
+      ~sender:first_contract
+      ~amount:(Memory_proto_alpha.Protocol.Alpha_context.Tez.zero)
+      ()
+  in
+  let new_website = e_bytes_string "ligolang.org" in
+  let id_details_2 = e_record_ez [("owner", e_address new_addr) ;
+                                  ("controller", e_address new_addr) ;
+                                  ("profile", new_website)]
+  in
+  let id_details_2_diff = e_record_ez [("owner", e_address owner_addr) ;
+                                       ("controller", e_address new_addr) ;
+                                       ("profile", new_website)] in
+  let storage = e_record_ez [("identities", (e_big_map
+                                               [(e_int 0, id_details_1) ;
+                                                (e_int 1, id_details_2)])) ;
+                             ("next_id", e_int 2) ;
+                             ("name_price", e_mutez 1000000) ;
+                             ("skip_price", e_mutez 1000000) ; ]
+  in
+  let new_storage = e_record_ez [("identities", (e_big_map
+                                               [(e_int 0, id_details_1) ;
+                                                (e_int 1, id_details_2_diff)])) ;
+                             ("next_id", e_int 2) ;
+                             ("name_price", e_mutez 1000000) ;
+                             ("skip_price", e_mutez 1000000) ; ]
+  in
+  let param = e_record_ez [("id", e_int 1) ;
+                           ("new_owner", e_address owner_addr)] in
+  let%bind () = expect_eq ~options program "update_owner"
+      (e_pair param storage)
+      (e_pair (e_list []) new_storage)
+  in ok ()
+
+(* Test that contract fails when we attempt to update owner of nonexistent ID *)
+let update_owner_nonexistent () =
+  let%bind program, _ = get_program () in
+  let owner_addr = addr 5 in
+  let owner_website = e_bytes_string "ligolang.org" in
+  let id_details_1 = e_record_ez [("owner", e_address owner_addr) ;
+                                  ("controller", e_address owner_addr) ;
+                                  ("profile", owner_website)]
+  in
+  let new_addr = first_owner in
+  let options = Proto_alpha_utils.Memory_proto_alpha.make_options
+      ~sender:first_contract
+      ~amount:(Memory_proto_alpha.Protocol.Alpha_context.Tez.zero)
+      ()
+  in
+  let new_website = e_bytes_string "ligolang.org" in
+  let id_details_2 = e_record_ez [("owner", e_address new_addr) ;
+                                  ("controller", e_address new_addr) ;
+                                  ("profile", new_website)]
+  in
+  let storage = e_record_ez [("identities", (e_big_map
+                                               [(e_int 0, id_details_1) ;
+                                                (e_int 1, id_details_2)])) ;
+                             ("next_id", e_int 2) ;
+                             ("name_price", e_mutez 1000000) ;
+                             ("skip_price", e_mutez 1000000) ; ]
+  in
+  let param = e_record_ez [("id", e_int 2);
+                           ("new_owner", e_address new_addr)] in
+  let%bind () = expect_string_failwith ~options program "update_owner"
+      (e_pair param storage)
+      "This ID does not exist."
+  in ok ()
+
+(* Test that contract fails when we attempt to update owner from non-owner addr *)
+let update_owner_wrong_addr () =
+  let%bind program, _ = get_program () in
+  let owner_addr = addr 5 in
+  let owner_website = e_bytes_string "ligolang.org" in
+  let id_details_1 = e_record_ez [("owner", e_address owner_addr) ;
+                                  ("controller", e_address owner_addr) ;
+                                  ("profile", owner_website)]
+  in
+  let new_addr = first_owner in
+  let options = Proto_alpha_utils.Memory_proto_alpha.make_options
+      ~sender:first_contract
+      ~amount:(Memory_proto_alpha.Protocol.Alpha_context.Tez.zero)
+      ()
+  in
+  let new_website = e_bytes_string "ligolang.org" in
+  let id_details_2 = e_record_ez [("owner", e_address new_addr) ;
+                                  ("controller", e_address new_addr) ;
+                                  ("profile", new_website)]
+  in
+  let storage = e_record_ez [("identities", (e_big_map
+                                               [(e_int 0, id_details_1) ;
+                                                (e_int 1, id_details_2)])) ;
+                             ("next_id", e_int 2) ;
+                             ("name_price", e_mutez 1000000) ;
+                             ("skip_price", e_mutez 1000000) ; ]
+  in
+  let param = e_record_ez [("id", e_int 0);
+                           ("new_owner", e_address new_addr)] in
+  let%bind () = expect_string_failwith ~options program "update_owner"
+      (e_pair param storage)
+      "You are not the owner of this ID."
+  in ok ()
+
+let skip () =
+  let%bind program, _ = get_program () in
+  let owner_addr = addr 5 in
+  let owner_website = e_bytes_string "ligolang.org" in
+  let id_details_1 = e_record_ez [("owner", e_address owner_addr) ;
+                                  ("controller", e_address owner_addr) ;
+                                  ("profile", owner_website)]
+  in
+  let new_addr = first_owner in
+  let options = Proto_alpha_utils.Memory_proto_alpha.make_options
+      ~sender:first_contract
+      ~amount:(Memory_proto_alpha.Protocol.Alpha_context.Tez.one) ()
+  in
+  let new_website = e_bytes_string "ligolang.org" in
+  let id_details_2 = e_record_ez [("owner", e_address new_addr) ;
+                                  ("controller", e_address new_addr) ;
+                                  ("profile", new_website)]
+  in
+  let storage = e_record_ez [("identities", (e_big_map
+                                               [(e_int 0, id_details_1) ;
+                                                (e_int 1, id_details_2)])) ;
+                             ("next_id", e_int 2) ;
+                             ("name_price", e_mutez 1000000) ;
+                             ("skip_price", e_mutez 1000000) ; ]
+  in
+  let new_storage = e_record_ez [("identities", (e_big_map
+                                               [(e_int 0, id_details_1) ;
+                                                (e_int 1, id_details_2)])) ;
+                             ("next_id", e_int 3) ;
+                             ("name_price", e_mutez 1000000) ;
+                             ("skip_price", e_mutez 1000000) ; ]
+  in
+  let%bind () = expect_eq ~options program "skip"
+      (e_pair (e_unit ()) storage)
+      (e_pair (e_list []) new_storage)
+  in ok ()
+
+(* Test that contract fails if we try to skip without paying the right amount *)
+let skip_wrong_amount () =
+  let%bind program, _ = get_program () in
+  let owner_addr = addr 5 in
+  let owner_website = e_bytes_string "ligolang.org" in
+  let id_details_1 = e_record_ez [("owner", e_address owner_addr) ;
+                                  ("controller", e_address owner_addr) ;
+                                  ("profile", owner_website)]
+  in
+  let new_addr = first_owner in
+  let options = Proto_alpha_utils.Memory_proto_alpha.make_options
+      ~sender:first_contract
+      ~amount:(Memory_proto_alpha.Protocol.Alpha_context.Tez.fifty_cents) ()
+  in
+  let new_website = e_bytes_string "ligolang.org" in
+  let id_details_2 = e_record_ez [("owner", e_address new_addr) ;
+                                  ("controller", e_address new_addr) ;
+                                  ("profile", new_website)]
+  in
+  let storage = e_record_ez [("identities", (e_big_map
+                                               [(e_int 0, id_details_1) ;
+                                                (e_int 1, id_details_2)])) ;
+                             ("next_id", e_int 2) ;
+                             ("name_price", e_mutez 1000000) ;
+                             ("skip_price", e_mutez 1000000) ; ]
+  in
+  let%bind () = expect_string_failwith ~options program "skip"
+      (e_pair (e_unit ()) storage)
+      "Incorrect amount paid."
+  in ok ()
+
+let main = test_suite "ID Layer" [
+    test "buy"    buy_id ;
+    test "buy (sender addr)" buy_id_sender_addr ;
+    test "buy (wrong amount)" buy_id_wrong_amount ;
+    test "update_details (owner)" update_details_owner ;
+    test "update_details (controller)" update_details_controller ;
+    test "update_details_nonexistent" update_details_nonexistent ;
+    test "update_details_wrong_addr" update_details_wrong_addr ;
+    test "update_details_unchanged" update_details_unchanged ;
+    test "update_owner" update_owner ;
+    test "update_owner_nonexistent" update_owner_nonexistent ;
+    test "update_owner_wrong_addr" update_owner_wrong_addr ;
+    test "skip" skip ;
+    test "skip (wrong amount)" skip_wrong_amount ;
+]
diff --git a/src/test/test.ml b/src/test/test.ml
index 01d8a78f6..04eb54428 100644
--- a/src/test/test.ml
+++ b/src/test/test.ml
@@ -11,6 +11,7 @@ let () =
     Coase_tests.main ;
     Vote_tests.main ;
     Id_tests.main ;
+    Id_tests_p.main ;
     Multisig_tests.main ;
     Multisig_v2_tests.main ;
     Replaceable_id_tests.main ;