diff --git a/src/ligo/test/coase_tests.ml b/src/ligo/test/coase_tests.ml
index f1d180e2c..f0ca9cacd 100644
--- a/src/ligo/test/coase_tests.ml
+++ b/src/ligo/test/coase_tests.ml
@@ -27,9 +27,8 @@ let card_ty = ez_t_record [
 
 let card_ez owner = card (e_a_empty_address owner)
 
-let make_cards lst =
+let make_cards assoc_lst =
   let card_id_ty = t_nat () in
-  let assoc_lst = List.mapi (fun i x -> (e_a_empty_nat i , x)) lst in
   e_a_empty_map assoc_lst card_id_ty card_ty
 
 let card_pattern (coeff , qtt) =
@@ -62,20 +61,29 @@ let storage cards_patterns cards next_id =
 let storage_ez cps cs next_id =
   storage (make_card_patterns cps) (make_cards cs) (e_a_empty_nat next_id)
 
-let basic a b n next_id =
+let cards_ez owner n =
+  List.mapi (fun i x -> (e_a_empty_nat i , x))
+  @@ List.map card_ez
+  @@ List.map (Function.constant owner)
+  @@ List.range n
+
+let first_owner =
+  let open Tezos_utils.Memory_proto_alpha in
+  let id = List.nth dummy_environment.identities 0 in
+  let kt = id.implicit_contract in
+  Alpha_context.Contract.to_b58check kt
+
+let second_owner =
+  let open Tezos_utils.Memory_proto_alpha in
+  let id = List.nth dummy_environment.identities 1 in
+  let kt = id.implicit_contract in
+  Alpha_context.Contract.to_b58check kt
+
+let basic a b cards next_id =
   let card_patterns = List.map card_pattern_ez [
     (100 , a) ;
     (20 , b) ;
   ] in
-  let owner =
-    let open Tezos_utils.Memory_proto_alpha in
-    let id = List.hd dummy_environment.identities in
-    let kt = id.implicit_contract in
-    Alpha_context.Contract.to_b58check kt in
-  let cards =
-    List.map card_ez
-    @@ List.map (Function.constant owner)
-    @@ List.range n in
   storage_ez card_patterns cards next_id
 
 let buy () =
@@ -86,20 +94,29 @@ let buy () =
       let buy_action = ez_e_a_empty_record [
           ("card_to_buy" , e_a_empty_nat 0) ;
         ] in
-      let storage = basic 100 1000 n (2 * n) in
+      let storage = basic 100 1000 (cards_ez first_owner n) (2 * n) in
       e_a_empty_pair buy_action storage
     in
+    let expected =
+      let ops = e_a_empty_list [] (t_operation ()) in
+      let storage =
+        let cards =
+          cards_ez first_owner n @
+          [(e_a_empty_nat (2 * n) , card (e_a_empty_address second_owner))]
+        in
+        basic 101 1000 cards ((2 * n) + 1) in
+      e_a_empty_pair ops storage
+    in
     let%bind amount =
       trace_option (simple_error "getting amount for run") @@
       Tezos_utils.Memory_proto_alpha.Alpha_context.Tez.of_mutez @@ Int64.of_int 10000000000 in
     let%bind result = easy_run_typed ~amount "buy_single" program input in
     Format.printf "\nResult : %a\n" Ast_typed.PP.value result ;
-    let expected = e_a_empty_bool (n = 0) in
     AST_Typed.assert_value_eq (expected, result)
   in
   let%bind _ = bind_list
     @@ List.map aux
-    @@ [0 ; 2 ; 7 ; 12] in
+    @@ [2 ; (* 0 ; 7 ; 12 *)] in
   ok ()
 
 let main = "Coase (End to End)", [
diff --git a/src/ligo/test/test.ml b/src/ligo/test/test.ml
index 3dbd250cb..2cb1ec87d 100644
--- a/src/ligo/test/test.ml
+++ b/src/ligo/test/test.ml
@@ -9,6 +9,6 @@ let () =
     Transpiler_tests.main ;
     Typer_tests.main ;
     Heap_tests.main ;
-    (* Coase_tests.main ; *)
+    Coase_tests.main ;
   ] ;
   ()