diff --git a/src/main/resources/sql/fixtures/05-constitution.sql b/src/main/resources/sql/fixtures/05-constitution.sql
index 9fdc8d5..8085cdd 100644
--- a/src/main/resources/sql/fixtures/05-constitution.sql
+++ b/src/main/resources/sql/fixtures/05-constitution.sql
@@ -7,16 +7,18 @@ begin
     delete from title;
     delete from constitution;
 
-    insert into constitution (version_id, created_by_id, title, annonymous)
+    insert into constitution (id, version_id, created_by_id, title, annonymous)
     select
-        uuid_generate_v4(),
+        uuid_in(md5('constitution'||row_number() over ())::cstring),
+        uuid_in(md5('constitution_v'||row_number() over ())::cstring),
         z.id,
         'title' || row_number() over (),
         row_number() over () % 3 = 0
     from citizen z;
 
-    insert into title (created_by_id, name, rank, constitution_id)
+    insert into title (id, created_by_id, name, rank, constitution_id)
     select
+        uuid_in(md5('constitution_title'||row_number() over ())::cstring),
         c.created_by_id,
         'name' || row_number() over (),
         row_number() over (),
@@ -24,8 +26,9 @@ begin
     from constitution c,
     lateral generate_series(1, 5) g;
 
-    insert into article_in_title (created_by_id, rank, title_id, article_id, constitution_id)
+    insert into article_in_title (id, created_by_id, rank, title_id, article_id, constitution_id)
     select
+        uuid_in(md5('article_in_title'||row_number() over ())::cstring),
         ti.created_by_id,
         row_number() over (),
         ti.id,
diff --git a/src/main/resources/sql/functions/constitution/upsert_constitution.sql b/src/main/resources/sql/functions/constitution/upsert_constitution.sql
index 42fe892..66591f1 100644
--- a/src/main/resources/sql/functions/constitution/upsert_constitution.sql
+++ b/src/main/resources/sql/functions/constitution/upsert_constitution.sql
@@ -1,4 +1,4 @@
-create or replace procedure upsert_constitution(inout resource json)
+create or replace function upsert_constitution(inout resource json)
     language plpgsql as
 $$
 declare
@@ -30,4 +30,4 @@ begin
 end;
 $$;
 
--- drop procedure if exists upsert_constitution(inout json);
\ No newline at end of file
+-- drop function if exists upsert_constitution(inout json);
\ No newline at end of file
diff --git a/src/test/resources/feature/constitution.feature b/src/test/resources/feature/constitution.feature
new file mode 100644
index 0000000..2289d5e
--- /dev/null
+++ b/src/test/resources/feature/constitution.feature
@@ -0,0 +1,45 @@
+Feature: constitution routes
+
+  Scenario: The route for get constitutions must response a 200
+    When I send a "GET" request to "/constitutions"
+    Then the response status code should be 200
+
+  Scenario: The route for get one constitution must response a 200 and return constitution
+    When I send a "GET" request to "/constitutions/0ca489a6-ef68-8bd5-2355-5793d4b3d66c"
+    Then the response status code should be 200
+    And the response should contain object:
+      | id | 0ca489a6-ef68-8bd5-2355-5793d4b3d66c |
+
+  Scenario: The route for create constitution must response a 200 and return object
+    Given I have citizen:
+      | id        | 64b7b379-2298-43ec-b428-ba134930cabd |
+      | firstName | Jaque                                |
+      | lastName  | Dupuis                               |
+    When I send a "POST" request to "/constitutions" with body:
+    """
+    {
+       "version_id":"15814bb6-8d90-4c6a-a456-c3939a8ec75e",
+       "title":"Hello world!",
+       "annonymous":true,
+       "titles":[
+          {
+             "id":"8156b66f-a9c8-4fd9-8375-a8a1f42ccfd2",
+             "name":"plop",
+             "rank":0,
+             "created_by":{
+                "id":"64b7b379-2298-43ec-b428-ba134930cabd"
+             }
+          }
+       ],
+       "created_by":{
+          "id":"64b7b379-2298-43ec-b428-ba134930cabd"
+       },
+       "created_at":null,
+       "version_id":"3311a7af-2a62-4e31-b4cd-889f8ead9737",
+       "version_number":null
+    }
+    """
+    Then the response status code should be 200
+    And the response should contain object:
+      | version_id | 15814bb6-8d90-4c6a-a456-c3939a8ec75e |
+      | title      | Hello world!                         |
\ No newline at end of file