diff --git a/.junie/guidelines.md b/.junie/guidelines.md
index 8ef0b7c8d..899c890b1 100644
--- a/.junie/guidelines.md
+++ b/.junie/guidelines.md
@@ -149,6 +149,14 @@ Key configuration files:
 - `package.json`: JavaScript dependencies and scripts
 - `.env`: Default environment variables. Must usually not be updated: use `.env.local` instead.
 
+### Development guidelines
+
+#### Usage of clock
+
+When we need to use a DateTime or DateTimeImmutable that need to express "now", we prefer the usage of
+`Symfony\Component\Clock\ClockInterface`, where possible. This is usually not possible in doctrine entities,
+where injection does not work when restoring an entity from database, but usually possible in services.
+
 ### Testing Information
 
 The project uses PHPUnit for testing. Each bundle has its own test suite, and there's also a global test suite at the root level.
@@ -218,7 +226,7 @@ class TicketTest extends TestCase
 
 #### Test Database
 
-For tests that require a database, the project uses an in-memory SQLite database by default. You can configure a different database for testing in the `.env.test` file.
+For tests that require a database, the project uses postgresql database filled by fixtures (usage of doctrine-fixtures). You can configure a different database for testing in the `.env.test` file.
 
 ### Code Quality Tools
 
diff --git a/src/Bundle/ChillTicketBundle/chill.api.specs.yaml b/src/Bundle/ChillTicketBundle/chill.api.specs.yaml
index 5be9ac0c0..3aac7f2ec 100644
--- a/src/Bundle/ChillTicketBundle/chill.api.specs.yaml
+++ b/src/Bundle/ChillTicketBundle/chill.api.specs.yaml
@@ -27,6 +27,23 @@ components:
                 - type
 
 paths:
+    /1.0/ticket/ticket/{id}:
+        get:
+            tags:
+                - ticket
+            summary: Details of a ticket
+            parameters:
+                -   name: id
+                    in: path
+                    required: true
+                    description: The ticket id
+                    schema:
+                        type: integer
+                        format: integer
+                        minimum: 1
+            responses:
+                200:
+                    description: "OK"
     /1.0/ticket/motive.json:
         get:
             tags:
@@ -94,6 +111,34 @@ paths:
                 422:
                     description: "UNPROCESSABLE ENTITY"
 
+    /1.0/ticket/{id}/persons/set:
+        post:
+            tags:
+                - ticket
+            summary: Associate a person with the ticket
+            parameters:
+                -   name: id
+                    in: path
+                    required: true
+                    description: The ticket id
+                    schema:
+                        type: integer
+                        format: integer
+                        minimum: 1
+            requestBody:
+                required: true
+                content:
+                    application/json:
+                        schema:
+                            type: object
+                            properties:
+                                persons:
+                                    type: array
+                                    items:
+                                        $ref: '#/components/schemas/PersonById'
+            responses:
+                200:
+                    description: "OK"
     /1.0/ticket/{id}/addressees/set:
         post:
             tags:
@@ -161,3 +206,52 @@ paths:
                     description: "ACCEPTED"
                 422:
                     description: "UNPROCESSABLE ENTITY"
+
+    /1.0/ticket/ticket/{id}/close:
+        post:
+            tags:
+                - ticket
+            summary: Close a ticket
+            description: |
+                Close an existing ticket.
+
+                If the ticket is already close, no action will be performed on this ticket: his state will remains unchanged, and the
+                ticket will be returned.
+            parameters:
+                -   name: id
+                    in: path
+                    required: true
+                    description: The ticket id
+                    schema:
+                        type: integer
+                        format: integer
+                        minimum: 1
+            responses:
+                200:
+                    description: "OK"
+                401:
+                    description: "UNAUTHORIZED"
+    /1.0/ticket/ticket/{id}/open:
+        post:
+            tags:
+                - ticket
+            summary: Open a ticket
+            description: |
+                Re-open an existing ticket.
+
+                If the ticket is already opened, no action will be performed on this ticket: his state will remains unchanged, and the
+                ticket will be returned.
+            parameters:
+                -   name: id
+                    in: path
+                    required: true
+                    description: The ticket id
+                    schema:
+                        type: integer
+                        format: integer
+                        minimum: 1
+            responses:
+                200:
+                    description: "OK"
+                401:
+                    description: "UNAUTHORIZED"
diff --git a/src/Bundle/ChillTicketBundle/src/Action/Ticket/ChangeStateCommand.php b/src/Bundle/ChillTicketBundle/src/Action/Ticket/ChangeStateCommand.php
new file mode 100644
index 000000000..f668a2455
--- /dev/null
+++ b/src/Bundle/ChillTicketBundle/src/Action/Ticket/ChangeStateCommand.php
@@ -0,0 +1,24 @@
+<?php
+
+declare(strict_types=1);
+
+/*
+ * Chill is a software for social workers
+ *
+ * For the full copyright and license information, please view
+ * the LICENSE file that was distributed with this source code.
+ */
+
+namespace Chill\TicketBundle\Action\Ticket;
+
+use Chill\TicketBundle\Entity\StateEnum;
+
+/**
+ * Command to change the state of a ticket.
+ */
+final readonly class ChangeStateCommand
+{
+    public function __construct(
+        public StateEnum $newState,
+    ) {}
+}
diff --git a/src/Bundle/ChillTicketBundle/src/Action/Ticket/Handler/AssociateByPhonenumberCommandHandler.php b/src/Bundle/ChillTicketBundle/src/Action/Ticket/Handler/AssociateByPhonenumberCommandHandler.php
index deec240f2..d794250c5 100644
--- a/src/Bundle/ChillTicketBundle/src/Action/Ticket/Handler/AssociateByPhonenumberCommandHandler.php
+++ b/src/Bundle/ChillTicketBundle/src/Action/Ticket/Handler/AssociateByPhonenumberCommandHandler.php
@@ -22,10 +22,10 @@ use Symfony\Component\Clock\ClockInterface;
 class AssociateByPhonenumberCommandHandler
 {
     public function __construct(
-        private PersonACLAwareRepositoryInterface $personRepository,
-        private PhonenumberHelper $phonenumberHelper,
-        private ClockInterface $clock,
-        private EntityManagerInterface $entityManager,
+        private readonly PersonACLAwareRepositoryInterface $personRepository,
+        private readonly PhonenumberHelper $phonenumberHelper,
+        private readonly ClockInterface $clock,
+        private readonly EntityManagerInterface $entityManager,
     ) {}
 
     public function __invoke(Ticket $ticket, AssociateByPhonenumberCommand $command): void
diff --git a/src/Bundle/ChillTicketBundle/src/Action/Ticket/Handler/ChangeStateCommandHandler.php b/src/Bundle/ChillTicketBundle/src/Action/Ticket/Handler/ChangeStateCommandHandler.php
new file mode 100644
index 000000000..7558b0d75
--- /dev/null
+++ b/src/Bundle/ChillTicketBundle/src/Action/Ticket/Handler/ChangeStateCommandHandler.php
@@ -0,0 +1,49 @@
+<?php
+
+declare(strict_types=1);
+
+/*
+ * Chill is a software for social workers
+ *
+ * For the full copyright and license information, please view
+ * the LICENSE file that was distributed with this source code.
+ */
+
+namespace Chill\TicketBundle\Action\Ticket\Handler;
+
+use Chill\TicketBundle\Action\Ticket\ChangeStateCommand;
+use Chill\TicketBundle\Entity\StateHistory;
+use Chill\TicketBundle\Entity\Ticket;
+use Symfony\Component\Clock\ClockInterface;
+
+/**
+ * Handler for changing the state of a ticket.
+ */
+class ChangeStateCommandHandler
+{
+    public function __construct(private readonly ClockInterface $clock) {}
+
+    public function __invoke(Ticket $ticket, ChangeStateCommand $command): Ticket
+    {
+        // If the ticket is already in the requested state, return it without changes
+        if ($command->newState === $ticket->getState()) {
+            return $ticket;
+        }
+
+        // End the current state history (if any)
+        foreach ($ticket->getStateHistories() as $stateHistory) {
+            if (null === $stateHistory->getEndDate()) {
+                $stateHistory->setEndDate($this->clock->now());
+            }
+        }
+
+        // Create a new state history with the new state
+        new StateHistory(
+            $command->newState,
+            $ticket,
+            $this->clock->now(),
+        );
+
+        return $ticket;
+    }
+}
diff --git a/src/Bundle/ChillTicketBundle/src/Action/Ticket/Handler/CreateTicketCommandHandler.php b/src/Bundle/ChillTicketBundle/src/Action/Ticket/Handler/CreateTicketCommandHandler.php
index 4fdbfa8f3..c354294d0 100644
--- a/src/Bundle/ChillTicketBundle/src/Action/Ticket/Handler/CreateTicketCommandHandler.php
+++ b/src/Bundle/ChillTicketBundle/src/Action/Ticket/Handler/CreateTicketCommandHandler.php
@@ -12,15 +12,22 @@ declare(strict_types=1);
 namespace Chill\TicketBundle\Action\Ticket\Handler;
 
 use Chill\TicketBundle\Action\Ticket\CreateTicketCommand;
+use Chill\TicketBundle\Entity\StateEnum;
+use Chill\TicketBundle\Entity\StateHistory;
 use Chill\TicketBundle\Entity\Ticket;
+use Symfony\Component\Clock\ClockInterface;
 
 class CreateTicketCommandHandler
 {
+    public function __construct(private readonly ClockInterface $clock) {}
+
     public function __invoke(CreateTicketCommand $command): Ticket
     {
         $ticket = new Ticket();
         $ticket->setExternalRef($command->externalReference);
 
+        new StateHistory(StateEnum::OPEN, $ticket, $this->clock->now());
+
         return $ticket;
     }
 }
diff --git a/src/Bundle/ChillTicketBundle/src/Controller/ChangeStateApiController.php b/src/Bundle/ChillTicketBundle/src/Controller/ChangeStateApiController.php
new file mode 100644
index 000000000..55e09162d
--- /dev/null
+++ b/src/Bundle/ChillTicketBundle/src/Controller/ChangeStateApiController.php
@@ -0,0 +1,73 @@
+<?php
+
+declare(strict_types=1);
+
+/*
+ * Chill is a software for social workers
+ *
+ * For the full copyright and license information, please view
+ * the LICENSE file that was distributed with this source code.
+ */
+
+namespace Chill\TicketBundle\Controller;
+
+use Chill\TicketBundle\Action\Ticket\ChangeStateCommand;
+use Chill\TicketBundle\Action\Ticket\Handler\ChangeStateCommandHandler;
+use Chill\TicketBundle\Entity\StateEnum;
+use Chill\TicketBundle\Entity\Ticket;
+use Doctrine\ORM\EntityManagerInterface;
+use Symfony\Component\HttpFoundation\JsonResponse;
+use Symfony\Component\HttpFoundation\Response;
+use Symfony\Component\HttpKernel\Exception\AccessDeniedHttpException;
+use Symfony\Component\Routing\Annotation\Route;
+use Symfony\Component\Security\Core\Security;
+use Symfony\Component\Serializer\SerializerInterface;
+
+/**
+ * Controller for changing the state of a ticket.
+ */
+final readonly class ChangeStateApiController
+{
+    public function __construct(
+        private ChangeStateCommandHandler $changeStateCommandHandler,
+        private Security $security,
+        private EntityManagerInterface $entityManager,
+        private SerializerInterface $serializer,
+    ) {}
+
+    #[Route('/api/1.0/ticket/ticket/{id}/close', name: 'chill_ticket_ticket_close_api', requirements: ['id' => '\d+'], methods: ['POST'])]
+    public function close(Ticket $ticket): Response
+    {
+        if (!$this->security->isGranted('ROLE_USER')) {
+            throw new AccessDeniedHttpException('Only users are allowed to close tickets.');
+        }
+
+        $command = new ChangeStateCommand(StateEnum::CLOSED);
+        $this->changeStateCommandHandler->__invoke($ticket, $command);
+
+        $this->entityManager->flush();
+
+        return new JsonResponse(
+            $this->serializer->serialize($ticket, 'json', ['groups' => ['read']]),
+            json: true
+        );
+    }
+
+    #[Route('/api/1.0/ticket/ticket/{id}/open', name: 'chill_ticket_ticket_open_api', requirements: ['id' => '\d+'], methods: ['POST'])]
+    public function open(Ticket $ticket): Response
+    {
+        if (!$this->security->isGranted('ROLE_USER')) {
+            throw new AccessDeniedHttpException('Only users are allowed to open tickets.');
+        }
+
+        $command = new ChangeStateCommand(StateEnum::OPEN);
+        $this->changeStateCommandHandler->__invoke($ticket, $command);
+
+        $this->entityManager->flush();
+
+        return new JsonResponse(
+            $this->serializer->serialize($ticket, 'json', ['groups' => ['read']]),
+            json: true
+        );
+    }
+}
diff --git a/src/Bundle/ChillTicketBundle/src/Controller/EditTicketController.php b/src/Bundle/ChillTicketBundle/src/Controller/EditTicketController.php
index fcff2aa56..c9886759c 100644
--- a/src/Bundle/ChillTicketBundle/src/Controller/EditTicketController.php
+++ b/src/Bundle/ChillTicketBundle/src/Controller/EditTicketController.php
@@ -19,7 +19,7 @@ use Twig\Environment;
 class EditTicketController
 {
     public function __construct(
-        private Environment $templating,
+        private readonly Environment $templating,
     ) {}
 
     #[Route('/{_locale}/ticket/ticket/{id}/edit', name: 'chill_ticket_ticket_edit')]
diff --git a/src/Bundle/ChillTicketBundle/src/Controller/FindCallerController.php b/src/Bundle/ChillTicketBundle/src/Controller/FindCallerController.php
index 94febedaa..c5d476361 100644
--- a/src/Bundle/ChillTicketBundle/src/Controller/FindCallerController.php
+++ b/src/Bundle/ChillTicketBundle/src/Controller/FindCallerController.php
@@ -28,7 +28,7 @@ use Symfony\Component\Routing\Annotation\Route;
  */
 class FindCallerController
 {
-    public function __construct(private PhonenumberHelper $phonenumberHelper, private PersonRepository $personRepository, private PersonRenderInterface $personRender) {}
+    public function __construct(private readonly PhonenumberHelper $phonenumberHelper, private readonly PersonRepository $personRepository, private readonly PersonRenderInterface $personRender) {}
 
     #[Route('/public/api/1.0/ticket/find-caller', name: 'find-caller', methods: ['GET'])]
     public function findCaller(Request $request): Response
diff --git a/src/Bundle/ChillTicketBundle/src/Controller/TicketControllerApi.php b/src/Bundle/ChillTicketBundle/src/Controller/TicketControllerApi.php
new file mode 100644
index 000000000..36cde311a
--- /dev/null
+++ b/src/Bundle/ChillTicketBundle/src/Controller/TicketControllerApi.php
@@ -0,0 +1,31 @@
+<?php
+
+declare(strict_types=1);
+
+/*
+ * Chill is a software for social workers
+ *
+ * For the full copyright and license information, please view
+ * the LICENSE file that was distributed with this source code.
+ */
+
+namespace Chill\TicketBundle\Controller;
+
+use Chill\TicketBundle\Entity\Ticket;
+use Symfony\Component\HttpFoundation\JsonResponse;
+use Symfony\Component\Routing\Annotation\Route;
+use Symfony\Component\Serializer\SerializerInterface;
+
+class TicketControllerApi
+{
+    public function __construct(private readonly SerializerInterface $serializer) {}
+
+    #[Route('/api/1.0/ticket/ticket/{id}', methods: ['GET'])]
+    public function get(Ticket $ticket): JsonResponse
+    {
+        return new JsonResponse(
+            $this->serializer->serialize($ticket, 'json', ['groups' => ['read']]),
+            json: true
+        );
+    }
+}
diff --git a/src/Bundle/ChillTicketBundle/src/Controller/TicketListController.php b/src/Bundle/ChillTicketBundle/src/Controller/TicketListController.php
index ab335f108..f15329689 100644
--- a/src/Bundle/ChillTicketBundle/src/Controller/TicketListController.php
+++ b/src/Bundle/ChillTicketBundle/src/Controller/TicketListController.php
@@ -67,7 +67,7 @@ final readonly class TicketListController
         // $motives = $this->motiveRepository->findAll();
 
         return $this->filterOrderHelperFactory
-            ->create(__CLASS__)
+            ->create(self::class)
             ->addSingleCheckbox('to_me', 'chill_ticket.list.filter.to_me')
             ->addSingleCheckbox('in_alert', 'chill_ticket.list.filter.in_alert')
             ->addDateRange('created_between', 'chill_ticket.list.filter.created_between')
diff --git a/src/Bundle/ChillTicketBundle/src/Resources/public/types.ts b/src/Bundle/ChillTicketBundle/src/Resources/public/types.ts
index 88047673d..3615887f7 100644
--- a/src/Bundle/ChillTicketBundle/src/Resources/public/types.ts
+++ b/src/Bundle/ChillTicketBundle/src/Resources/public/types.ts
@@ -3,8 +3,8 @@ import {
     TranslatableString,
     User,
     UserGroupOrUser,
-} from "../../../../ChillMainBundle/Resources/public/types";
-import { Person } from "../../../../ChillPersonBundle/Resources/public/types";
+} from "ChillMainAssets/types";
+import { Person } from "ChillPersonAssets/types";
 
 export interface Motive {
     type: "ticket_motive";
@@ -13,6 +13,8 @@ export interface Motive {
     label: TranslatableString;
 }
 
+export type TicketState = "open"|"closed";
+
 interface TicketHistory<T extends string, D extends object> {
     event_type: T;
     at: DateTime;
@@ -72,6 +74,10 @@ export interface PersonsState {
     persons: Person[];
 }
 
+export interface StateChange {
+    new_state: TicketState
+}
+
 export interface CreateTicketState {}
 
 //interface AddPersonEvent extends TicketHistory<"add_person", PersonHistory> {};
@@ -87,6 +93,8 @@ export interface CreateTicketEvent
     extends TicketHistory<"create_ticket", CreateTicketState> {}
 export interface PersonStateEvent
     extends TicketHistory<"persons_state", PersonsState> {}
+export interface ChangeStateEvent
+    extends TicketHistory<"state_change", StateChange> {}
 
 export type TicketHistoryLine =
     /* AddPersonEvent */
@@ -94,7 +102,8 @@ export type TicketHistoryLine =
     | AddCommentEvent
     | SetMotiveEvent /*AddAddressee | RemoveAddressee | */
     | AddresseesStateEvent
-    | PersonStateEvent;
+    | PersonStateEvent
+    | ChangeStateEvent;
 
 export interface Ticket {
     type: "ticket_ticket";
@@ -106,6 +115,7 @@ export interface Ticket {
     history: TicketHistoryLine[];
     createdAt: DateTime | null;
     updatedBy: User | null;
+    currentState: TicketState | null;
 }
 
 export interface addNewPersons {
diff --git a/src/Bundle/ChillTicketBundle/src/Serializer/Normalizer/TicketNormalizer.php b/src/Bundle/ChillTicketBundle/src/Serializer/Normalizer/TicketNormalizer.php
index 2b255f207..36e68fae9 100644
--- a/src/Bundle/ChillTicketBundle/src/Serializer/Normalizer/TicketNormalizer.php
+++ b/src/Bundle/ChillTicketBundle/src/Serializer/Normalizer/TicketNormalizer.php
@@ -18,6 +18,7 @@ use Chill\TicketBundle\Entity\AddresseeHistory;
 use Chill\TicketBundle\Entity\Comment;
 use Chill\TicketBundle\Entity\MotiveHistory;
 use Chill\TicketBundle\Entity\PersonHistory;
+use Chill\TicketBundle\Entity\StateHistory;
 use Chill\TicketBundle\Entity\Ticket;
 use Symfony\Component\Serializer\Exception\UnexpectedValueException;
 use Symfony\Component\Serializer\Normalizer\NormalizerAwareInterface;
@@ -49,6 +50,7 @@ final class TicketNormalizer implements NormalizerInterface, NormalizerAwareInte
             'updatedAt' => $this->normalizer->normalize($object->getUpdatedAt(), $format, $context),
             'updatedBy' => $this->normalizer->normalize($object->getUpdatedBy(), $format, $context),
             'createdBy' => $this->normalizer->normalize($object->getCreatedBy(), $format, $context),
+            'currentState' => $object->getState()?->value,
         ];
     }
 
@@ -60,6 +62,17 @@ final class TicketNormalizer implements NormalizerInterface, NormalizerAwareInte
     private function serializeHistory(Ticket $ticket, string $format, array $context): array
     {
         $events = [
+            ...array_map(
+                fn (StateHistory $stateHistory) => [
+                    'event_type' => 'state_change',
+                    'at' => $stateHistory->getStartDate(),
+                    'by' => $stateHistory->getCreatedBy(),
+                    'data' => [
+                        'new_state' => $stateHistory->getState()->value,
+                    ],
+                ],
+                $ticket->getStateHistories()->toArray(),
+            ),
             ...array_map(
                 fn (MotiveHistory $motiveHistory) => [
                     'event_type' => 'set_motive',
@@ -87,26 +100,6 @@ final class TicketNormalizer implements NormalizerInterface, NormalizerAwareInte
                 ],
                 $ticket->getComments()->toArray(),
             ),
-            /*
-            ...array_map(
-                fn (AddresseeHistory $history) => [
-                    'event_type' => 'add_addressee',
-                    'at' => $history->getStartDate(),
-                    'by' => $history->getCreatedBy(),
-                    'data' => $history,
-                ],
-                $ticket->getAddresseeHistories()->toArray(),
-            ),
-            ...array_map(
-                fn (AddresseeHistory $history) => [
-                    'event_type' => 'remove_addressee',
-                    'at' => $history->getStartDate(),
-                    'by' => $history->getRemovedBy(),
-                    'data' => $history,
-                ],
-                $ticket->getAddresseeHistories()->filter(fn (AddresseeHistory $history) => null !== $history->getEndDate())->toArray()
-            ),
-            */
             ...$this->addresseesStates($ticket),
             ...$this->personStates($ticket),
         ];
@@ -115,7 +108,8 @@ final class TicketNormalizer implements NormalizerInterface, NormalizerAwareInte
             $events[] =
                 [
                     'event_type' => 'create_ticket',
-                    'at' => $ticket->getCreatedAt()->sub(new \DateInterval('PT1S')), // TODO hack to avoid collision with creation of the ticket event,
+                    'at' => \DateTimeImmutable::createFromInterface($ticket->getCreatedAt())
+                        ->sub(new \DateInterval('PT1S')), // TODO hack to avoid collision with creation of the ticket event,
                     'by' => $ticket->getCreatedBy(),
                     'data' => [],
                 ];
@@ -123,9 +117,7 @@ final class TicketNormalizer implements NormalizerInterface, NormalizerAwareInte
 
         usort(
             $events,
-            static function (array $a, array $b): int {
-                return $a['at'] <=> $b['at'];
-            }
+            static fn (array $a, array $b): int => $a['at'] <=> $b['at']
         );
 
         return array_map(
diff --git a/src/Bundle/ChillTicketBundle/tests/Action/Ticket/Handler/ChangeStateCommandHandlerTest.php b/src/Bundle/ChillTicketBundle/tests/Action/Ticket/Handler/ChangeStateCommandHandlerTest.php
new file mode 100644
index 000000000..a19c89479
--- /dev/null
+++ b/src/Bundle/ChillTicketBundle/tests/Action/Ticket/Handler/ChangeStateCommandHandlerTest.php
@@ -0,0 +1,118 @@
+<?php
+
+declare(strict_types=1);
+
+/*
+ * Chill is a software for social workers
+ *
+ * For the full copyright and license information, please view
+ * the LICENSE file that was distributed with this source code.
+ */
+
+namespace Chill\TicketBundle\Tests\Action\Ticket\Handler;
+
+use Chill\TicketBundle\Action\Ticket\ChangeStateCommand;
+use Chill\TicketBundle\Action\Ticket\Handler\ChangeStateCommandHandler;
+use Chill\TicketBundle\Entity\StateEnum;
+use Chill\TicketBundle\Entity\StateHistory;
+use Chill\TicketBundle\Entity\Ticket;
+use PHPUnit\Framework\TestCase;
+use Prophecy\PhpUnit\ProphecyTrait;
+use Symfony\Component\Clock\MockClock;
+
+/**
+ * @internal
+ *
+ * @coversNothing
+ */
+final class ChangeStateCommandHandlerTest extends TestCase
+{
+    use ProphecyTrait;
+
+    public function testInvokeWithAlreadyClosedTicket(): void
+    {
+        $ticket = new Ticket();
+
+        // Create a closed state history
+        new StateHistory(StateEnum::CLOSED, $ticket);
+
+        $handler = new ChangeStateCommandHandler(new MockClock());
+        $command = new ChangeStateCommand(StateEnum::CLOSED);
+
+        $result = $handler->__invoke($ticket, $command);
+
+        // Assert that the ticket is returned unchanged
+        $this->assertSame($ticket, $result);
+        $this->assertSame(StateEnum::CLOSED, $ticket->getState());
+
+        // Assert that no new state history was created
+        $stateHistories = $ticket->getStateHistories();
+        $this->assertCount(1, $stateHistories);
+    }
+
+    public function testInvokeWithOpenTicketToClose(): void
+    {
+        $ticket = new Ticket();
+
+        // Create an open state history
+        new StateHistory(StateEnum::OPEN, $ticket);
+
+        $handler = new ChangeStateCommandHandler(new MockClock());
+        $command = new ChangeStateCommand(StateEnum::CLOSED);
+
+        $result = $handler->__invoke($ticket, $command);
+
+        // Assert that the ticket is returned
+        $this->assertSame($ticket, $result);
+
+        // Assert that the ticket state is now closed
+        $this->assertSame(StateEnum::CLOSED, $ticket->getState());
+
+        // Assert that the old state history was ended and a new one was created
+        $stateHistories = $ticket->getStateHistories();
+        $this->assertCount(2, $stateHistories);
+
+        // The first state history should be ended
+        $openStateHistory = $stateHistories->first();
+        $this->assertNotNull($openStateHistory->getEndDate());
+        $this->assertSame(StateEnum::OPEN, $openStateHistory->getState());
+
+        // The last state history should be closed and active
+        $closedStateHistory = $stateHistories->last();
+        $this->assertNull($closedStateHistory->getEndDate());
+        $this->assertSame(StateEnum::CLOSED, $closedStateHistory->getState());
+    }
+
+    public function testInvokeWithClosedTicketToOpen(): void
+    {
+        $ticket = new Ticket();
+
+        // Create a closed state history
+        new StateHistory(StateEnum::CLOSED, $ticket);
+
+        $handler = new ChangeStateCommandHandler(new MockClock());
+        $command = new ChangeStateCommand(StateEnum::OPEN);
+
+        $result = $handler->__invoke($ticket, $command);
+
+        // Assert that the ticket is returned
+        $this->assertSame($ticket, $result);
+
+        // Assert that the ticket state is now open
+        $this->assertSame(StateEnum::OPEN, $ticket->getState());
+
+        // Assert that the old state history was ended and a new one was created
+        $stateHistories = $ticket->getStateHistories();
+        $this->assertCount(2, $stateHistories);
+
+        // The first state history should be ended
+        $closedStateHistory = $stateHistories->first();
+        $this->assertNotNull($closedStateHistory->getEndDate());
+        $this->assertSame(StateEnum::CLOSED, $closedStateHistory->getState());
+
+        // The last state history should be open and active
+        $openStateHistory = $stateHistories->last();
+        $this->assertNull($openStateHistory->getEndDate());
+        $this->assertSame(StateEnum::OPEN, $openStateHistory->getState());
+    }
+}
diff --git a/src/Bundle/ChillTicketBundle/tests/Action/Ticket/Handler/CreateTicketCommandHandlerTest.php b/src/Bundle/ChillTicketBundle/tests/Action/Ticket/Handler/CreateTicketCommandHandlerTest.php
index 73f84b171..5d4e11566 100644
--- a/src/Bundle/ChillTicketBundle/tests/Action/Ticket/Handler/CreateTicketCommandHandlerTest.php
+++ b/src/Bundle/ChillTicketBundle/tests/Action/Ticket/Handler/CreateTicketCommandHandlerTest.php
@@ -13,8 +13,10 @@ namespace Chill\TicketBundle\Tests\Action\Ticket\Handler;
 
 use Chill\TicketBundle\Action\Ticket\CreateTicketCommand;
 use Chill\TicketBundle\Action\Ticket\Handler\CreateTicketCommandHandler;
+use Chill\TicketBundle\Entity\StateEnum;
 use Chill\TicketBundle\Entity\Ticket;
 use PHPUnit\Framework\TestCase;
+use Symfony\Component\Clock\MockClock;
 
 /**
  * @internal
@@ -25,7 +27,7 @@ class CreateTicketCommandHandlerTest extends TestCase
 {
     private function getHandler(): CreateTicketCommandHandler
     {
-        return new CreateTicketCommandHandler();
+        return new CreateTicketCommandHandler(new MockClock());
     }
 
     public function testHandleWithoutReference(): void
@@ -35,6 +37,7 @@ class CreateTicketCommandHandlerTest extends TestCase
 
         self::assertInstanceOf(Ticket::class, $actual);
         self::assertEquals('', $actual->getExternalRef());
+        self::assertEquals(StateEnum::OPEN, $actual->getState());
     }
 
     public function testHandleWithReference(): void
@@ -44,5 +47,6 @@ class CreateTicketCommandHandlerTest extends TestCase
 
         self::assertInstanceOf(Ticket::class, $actual);
         self::assertEquals($ref, $actual->getExternalRef());
+        self::assertEquals(StateEnum::OPEN, $actual->getState());
     }
 }
diff --git a/src/Bundle/ChillTicketBundle/tests/Action/Ticket/Handler/SetAddressesCommandHandlerTest.php b/src/Bundle/ChillTicketBundle/tests/Action/Ticket/Handler/SetAddressesCommandHandlerTest.php
index cef1ae153..3fc45db8a 100644
--- a/src/Bundle/ChillTicketBundle/tests/Action/Ticket/Handler/SetAddressesCommandHandlerTest.php
+++ b/src/Bundle/ChillTicketBundle/tests/Action/Ticket/Handler/SetAddressesCommandHandlerTest.php
@@ -39,12 +39,8 @@ final class SetAddressesCommandHandlerTest extends TestCase
         $command = new SetAddresseesCommand([$user1 = new User(), $group1 = new UserGroup()]);
 
         $entityManager = $this->prophesize(EntityManagerInterface::class);
-        $entityManager->persist(Argument::that(function ($arg) use ($user1) {
-            return $arg instanceof AddresseeHistory && $arg->getAddressee() === $user1;
-        }))->shouldBeCalledOnce();
-        $entityManager->persist(Argument::that(function ($arg) use ($group1) {
-            return $arg instanceof AddresseeHistory && $arg->getAddressee() === $group1;
-        }))->shouldBeCalledOnce();
+        $entityManager->persist(Argument::that(fn ($arg) => $arg instanceof AddresseeHistory && $arg->getAddressee() === $user1))->shouldBeCalledOnce();
+        $entityManager->persist(Argument::that(fn ($arg) => $arg instanceof AddresseeHistory && $arg->getAddressee() === $group1))->shouldBeCalledOnce();
 
         $handler = $this->buildHandler($entityManager->reveal());
 
@@ -61,9 +57,7 @@ final class SetAddressesCommandHandlerTest extends TestCase
         $command = new SetAddresseesCommand([$user]);
 
         $entityManager = $this->prophesize(EntityManagerInterface::class);
-        $entityManager->persist(Argument::that(function ($arg) use ($user) {
-            return $arg instanceof AddresseeHistory && $arg->getAddressee() === $user;
-        }))->shouldNotBeCalled();
+        $entityManager->persist(Argument::that(fn ($arg) => $arg instanceof AddresseeHistory && $arg->getAddressee() === $user))->shouldNotBeCalled();
 
         $handler = $this->buildHandler($entityManager->reveal());
 
@@ -82,9 +76,7 @@ final class SetAddressesCommandHandlerTest extends TestCase
         $command = new SetAddresseesCommand([$group]);
 
         $entityManager = $this->prophesize(EntityManagerInterface::class);
-        $entityManager->persist(Argument::that(function ($arg) use ($group) {
-            return $arg instanceof AddresseeHistory && $arg->getAddressee() === $group;
-        }))->shouldBeCalled();
+        $entityManager->persist(Argument::that(fn ($arg) => $arg instanceof AddresseeHistory && $arg->getAddressee() === $group))->shouldBeCalled();
 
         $handler = $this->buildHandler($entityManager->reveal());
 
@@ -101,9 +93,7 @@ final class SetAddressesCommandHandlerTest extends TestCase
         $command = new SetAddresseesCommand([$group, $group]);
 
         $entityManager = $this->prophesize(EntityManagerInterface::class);
-        $entityManager->persist(Argument::that(function ($arg) use ($group) {
-            return $arg instanceof AddresseeHistory && $arg->getAddressee() === $group;
-        }))->shouldBeCalledOnce();
+        $entityManager->persist(Argument::that(fn ($arg) => $arg instanceof AddresseeHistory && $arg->getAddressee() === $group))->shouldBeCalledOnce();
 
         $handler = $this->buildHandler($entityManager->reveal());
 
diff --git a/src/Bundle/ChillTicketBundle/tests/Action/Ticket/Handler/SetPersonsCommandHandlerTest.php b/src/Bundle/ChillTicketBundle/tests/Action/Ticket/Handler/SetPersonsCommandHandlerTest.php
index 3db50e7e6..5c609b543 100644
--- a/src/Bundle/ChillTicketBundle/tests/Action/Ticket/Handler/SetPersonsCommandHandlerTest.php
+++ b/src/Bundle/ChillTicketBundle/tests/Action/Ticket/Handler/SetPersonsCommandHandlerTest.php
@@ -39,12 +39,8 @@ final class SetPersonsCommandHandlerTest extends TestCase
         $command = new SetPersonsCommand([$person1 = new Person(), $group1 = new Person()]);
 
         $entityManager = $this->prophesize(EntityManagerInterface::class);
-        $entityManager->persist(Argument::that(function ($arg) use ($person1) {
-            return $arg instanceof PersonHistory && $arg->getPerson() === $person1;
-        }))->shouldBeCalledOnce();
-        $entityManager->persist(Argument::that(function ($arg) use ($group1) {
-            return $arg instanceof PersonHistory && $arg->getPerson() === $group1;
-        }))->shouldBeCalledOnce();
+        $entityManager->persist(Argument::that(fn ($arg) => $arg instanceof PersonHistory && $arg->getPerson() === $person1))->shouldBeCalledOnce();
+        $entityManager->persist(Argument::that(fn ($arg) => $arg instanceof PersonHistory && $arg->getPerson() === $group1))->shouldBeCalledOnce();
 
         $handler = $this->buildHandler($entityManager->reveal());
 
@@ -61,9 +57,7 @@ final class SetPersonsCommandHandlerTest extends TestCase
         $command = new SetPersonsCommand([$person]);
 
         $entityManager = $this->prophesize(EntityManagerInterface::class);
-        $entityManager->persist(Argument::that(function ($arg) use ($person) {
-            return $arg instanceof PersonHistory && $arg->getPerson() === $person;
-        }))->shouldNotBeCalled();
+        $entityManager->persist(Argument::that(fn ($arg) => $arg instanceof PersonHistory && $arg->getPerson() === $person))->shouldNotBeCalled();
 
         $handler = $this->buildHandler($entityManager->reveal());
 
@@ -82,9 +76,7 @@ final class SetPersonsCommandHandlerTest extends TestCase
         $command = new SetPersonsCommand([$person2]);
 
         $entityManager = $this->prophesize(EntityManagerInterface::class);
-        $entityManager->persist(Argument::that(function ($arg) use ($person2) {
-            return $arg instanceof PersonHistory && $arg->getPerson() === $person2;
-        }))->shouldBeCalled();
+        $entityManager->persist(Argument::that(fn ($arg) => $arg instanceof PersonHistory && $arg->getPerson() === $person2))->shouldBeCalled();
 
         $handler = $this->buildHandler($entityManager->reveal());
 
@@ -101,9 +93,7 @@ final class SetPersonsCommandHandlerTest extends TestCase
         $command = new SetPersonsCommand([$person, $person]);
 
         $entityManager = $this->prophesize(EntityManagerInterface::class);
-        $entityManager->persist(Argument::that(function ($arg) use ($person) {
-            return $arg instanceof PersonHistory && $arg->getPerson() === $person;
-        }))->shouldBeCalledOnce();
+        $entityManager->persist(Argument::that(fn ($arg) => $arg instanceof PersonHistory && $arg->getPerson() === $person))->shouldBeCalledOnce();
 
         $handler = $this->buildHandler($entityManager->reveal());
 
diff --git a/src/Bundle/ChillTicketBundle/tests/Controller/ChangeStateApiControllerTest.php b/src/Bundle/ChillTicketBundle/tests/Controller/ChangeStateApiControllerTest.php
new file mode 100644
index 000000000..ab8c2b3cb
--- /dev/null
+++ b/src/Bundle/ChillTicketBundle/tests/Controller/ChangeStateApiControllerTest.php
@@ -0,0 +1,144 @@
+<?php
+
+declare(strict_types=1);
+
+/*
+ * Chill is a software for social workers
+ *
+ * For the full copyright and license information, please view
+ * the LICENSE file that was distributed with this source code.
+ */
+
+namespace Chill\TicketBundle\Tests\Controller;
+
+use Chill\TicketBundle\Action\Ticket\ChangeStateCommand;
+use Chill\TicketBundle\Action\Ticket\Handler\ChangeStateCommandHandler;
+use Chill\TicketBundle\Controller\ChangeStateApiController;
+use Chill\TicketBundle\Entity\StateEnum;
+use Chill\TicketBundle\Entity\Ticket;
+use Doctrine\ORM\EntityManagerInterface;
+use PHPUnit\Framework\TestCase;
+use Prophecy\Argument;
+use Prophecy\PhpUnit\ProphecyTrait;
+use Symfony\Component\HttpFoundation\JsonResponse;
+use Symfony\Component\HttpKernel\Exception\AccessDeniedHttpException;
+use Symfony\Component\Security\Core\Security;
+use Symfony\Component\Serializer\SerializerInterface;
+
+/**
+ * @internal
+ *
+ * @coversNothing
+ */
+final class ChangeStateApiControllerTest extends TestCase
+{
+    use ProphecyTrait;
+
+    public function testCloseWithoutPermission(): void
+    {
+        $ticket = new Ticket();
+        $security = $this->prophesize(Security::class);
+        $security->isGranted('ROLE_USER')->willReturn(false);
+
+        $changeStateCommandHandler = $this->prophesize(ChangeStateCommandHandler::class);
+        $entityManager = $this->prophesize(EntityManagerInterface::class);
+        $serializer = $this->prophesize(SerializerInterface::class);
+
+        $controller = new ChangeStateApiController(
+            $changeStateCommandHandler->reveal(),
+            $security->reveal(),
+            $entityManager->reveal(),
+            $serializer->reveal(),
+        );
+
+        $this->expectException(AccessDeniedHttpException::class);
+        $controller->close($ticket);
+    }
+
+    public function testCloseWithPermission(): void
+    {
+        $ticket = new Ticket();
+
+        $security = $this->prophesize(Security::class);
+        $security->isGranted('ROLE_USER')->willReturn(true);
+
+        $changeStateCommandHandler = $this->prophesize(ChangeStateCommandHandler::class);
+        $changeStateCommandHandler->__invoke(
+            $ticket,
+            Argument::that(fn (ChangeStateCommand $command) => StateEnum::CLOSED === $command->newState)
+        )->willReturn($ticket);
+
+        $entityManager = $this->prophesize(EntityManagerInterface::class);
+        $entityManager->flush()->shouldBeCalled();
+
+        $serializer = $this->prophesize(SerializerInterface::class);
+        $serializer->serialize($ticket, 'json', ['groups' => ['read']])
+            ->willReturn('{}')
+            ->shouldBeCalled();
+
+        $controller = new ChangeStateApiController(
+            $changeStateCommandHandler->reveal(),
+            $security->reveal(),
+            $entityManager->reveal(),
+            $serializer->reveal(),
+        );
+
+        $response = $controller->close($ticket);
+
+        $this->assertInstanceOf(JsonResponse::class, $response);
+    }
+
+    public function testOpenWithoutPermission(): void
+    {
+        $ticket = new Ticket();
+        $security = $this->prophesize(Security::class);
+        $security->isGranted('ROLE_USER')->willReturn(false);
+
+        $changeStateCommandHandler = $this->prophesize(ChangeStateCommandHandler::class);
+        $entityManager = $this->prophesize(EntityManagerInterface::class);
+        $serializer = $this->prophesize(SerializerInterface::class);
+
+        $controller = new ChangeStateApiController(
+            $changeStateCommandHandler->reveal(),
+            $security->reveal(),
+            $entityManager->reveal(),
+            $serializer->reveal(),
+        );
+
+        $this->expectException(AccessDeniedHttpException::class);
+        $controller->open($ticket);
+    }
+
+    public function testOpenWithPermission(): void
+    {
+        $ticket = new Ticket();
+
+        $security = $this->prophesize(Security::class);
+        $security->isGranted('ROLE_USER')->willReturn(true);
+
+        $changeStateCommandHandler = $this->prophesize(ChangeStateCommandHandler::class);
+        $changeStateCommandHandler->__invoke(
+            $ticket,
+            Argument::that(fn (ChangeStateCommand $command) => StateEnum::OPEN === $command->newState)
+        )->willReturn($ticket);
+
+        $entityManager = $this->prophesize(EntityManagerInterface::class);
+        $entityManager->flush()->shouldBeCalled();
+
+        $serializer = $this->prophesize(SerializerInterface::class);
+        $serializer->serialize($ticket, 'json', ['groups' => ['read']])
+            ->willReturn('{}')
+            ->shouldBeCalled();
+
+        $controller = new ChangeStateApiController(
+            $changeStateCommandHandler->reveal(),
+            $security->reveal(),
+            $entityManager->reveal(),
+            $serializer->reveal(),
+        );
+
+        $response = $controller->open($ticket);
+
+        $this->assertInstanceOf(JsonResponse::class, $response);
+    }
+}
diff --git a/src/Bundle/ChillTicketBundle/tests/Controller/SetAddresseesControllerTest.php b/src/Bundle/ChillTicketBundle/tests/Controller/SetAddresseesControllerTest.php
index 1455f711f..5ff4bfd77 100644
--- a/src/Bundle/ChillTicketBundle/tests/Controller/SetAddresseesControllerTest.php
+++ b/src/Bundle/ChillTicketBundle/tests/Controller/SetAddresseesControllerTest.php
@@ -81,7 +81,7 @@ class SetAddresseesControllerTest extends KernelTestCase
 
         $asArray = json_decode($response->getContent(), true, 512, JSON_THROW_ON_ERROR);
         self::assertIsArray($asArray);
-        self::arrayHasKey('violations', $asArray);
+        self::arrayHasKey('violations');
         self::assertGreaterThan(0, count($asArray['violations']));
     }
 
@@ -147,7 +147,7 @@ class SetAddresseesControllerTest extends KernelTestCase
 
         $asArray = json_decode($response->getContent(), true, 512, JSON_THROW_ON_ERROR);
         self::assertIsArray($asArray);
-        self::arrayHasKey('violations', $asArray);
+        self::arrayHasKey('violations');
         self::assertGreaterThan(0, count($asArray['violations']));
     }
 
diff --git a/src/Bundle/ChillTicketBundle/tests/Entity/TicketTest.php b/src/Bundle/ChillTicketBundle/tests/Entity/TicketTest.php
index 6ce8b53ea..5776b3a00 100644
--- a/src/Bundle/ChillTicketBundle/tests/Entity/TicketTest.php
+++ b/src/Bundle/ChillTicketBundle/tests/Entity/TicketTest.php
@@ -114,25 +114,23 @@ class TicketTest extends KernelTestCase
     public function testGetState(): void
     {
         $ticket = new Ticket();
-        $openState = new StateEnum(StateEnum::OPEN, ['en' => 'Open', 'fr' => 'Ouvert']);
 
         // Initially, the ticket has no state
         self::assertNull($ticket->getState());
 
         // Create a state history entry with the open state
-        $history = new StateHistory($openState, $ticket);
+        $history = new StateHistory(StateEnum::OPEN, $ticket);
 
         // Verify that the ticket now has the open state
-        self::assertSame($openState, $ticket->getState());
+        self::assertSame(StateEnum::OPEN, $ticket->getState());
         self::assertCount(1, $ticket->getStateHistories());
 
         // Change the state to closed
-        $closedState = new StateEnum(StateEnum::CLOSED, ['en' => 'Closed', 'fr' => 'Fermé']);
         $history->setEndDate(new \DateTimeImmutable());
-        $history2 = new StateHistory($closedState, $ticket);
+        $history2 = new StateHistory(StateEnum::CLOSED, $ticket);
 
         // Verify that the ticket now has the closed state
         self::assertCount(2, $ticket->getStateHistories());
-        self::assertSame($closedState, $ticket->getState());
+        self::assertSame(StateEnum::CLOSED, $ticket->getState());
     }
 }
diff --git a/src/Bundle/ChillTicketBundle/tests/Serializer/Normalizer/TicketNormalizerTest.php b/src/Bundle/ChillTicketBundle/tests/Serializer/Normalizer/TicketNormalizerTest.php
index 035ce95a6..940c93d97 100644
--- a/src/Bundle/ChillTicketBundle/tests/Serializer/Normalizer/TicketNormalizerTest.php
+++ b/src/Bundle/ChillTicketBundle/tests/Serializer/Normalizer/TicketNormalizerTest.php
@@ -19,6 +19,8 @@ use Chill\TicketBundle\Entity\Comment;
 use Chill\TicketBundle\Entity\Motive;
 use Chill\TicketBundle\Entity\MotiveHistory;
 use Chill\TicketBundle\Entity\PersonHistory;
+use Chill\TicketBundle\Entity\StateEnum;
+use Chill\TicketBundle\Entity\StateHistory;
 use Chill\TicketBundle\Entity\Ticket;
 use Chill\TicketBundle\Serializer\Normalizer\TicketNormalizer;
 use Prophecy\Argument;
@@ -41,7 +43,6 @@ class TicketNormalizerTest extends KernelTestCase
     public function testNormalize(Ticket $ticket, array $expected): void
     {
         $actual = $this->buildNormalizer()->normalize($ticket, 'json', ['groups' => 'read']);
-
         self::assertEqualsCanonicalizing(array_keys($expected), array_keys($actual));
 
         foreach (array_keys($expected) as $k) {
@@ -61,23 +62,67 @@ class TicketNormalizerTest extends KernelTestCase
 
     public static function provideTickets(): iterable
     {
+        $t = new Ticket();
+
+        // added by action
+        new StateHistory(StateEnum::OPEN, $t, new \DateTimeImmutable('2024-06-16T00:00:00Z'));
+
+        // those are added by doctrine listeners
+        $t->setCreatedAt(new \DateTimeImmutable('2024-06-16T00:00:00Z'));
+        $t->setCreatedBy(new User());
+        $t->setUpdatedAt(new \DateTimeImmutable('2024-06-16T00:00:00Z'));
+        $t->setUpdatedBy(new User());
+
         yield [
             // this a nearly empty ticket
-            new Ticket(),
+            $t,
             [
                 'type' => 'ticket_ticket',
+                'createdAt' => $t->getCreatedAt()?->getTimestamp(),
+                'createdBy' => ['user'],
                 'id' => null,
                 'externalRef' => '',
                 'currentPersons' => [],
                 'currentAddressees' => [],
                 'currentInputs' => [],
                 'currentMotive' => null,
-                'history' => [],
+                'history' => [
+                    [
+                        'event_type' => 'create_ticket',
+                        'at' => 1718495999,
+                        'by' => [
+                            0 => 'user',
+                        ],
+                        'data' => [],
+                    ],
+                    [
+                        'event_type' => 'state_change',
+                        'at' => 1718495999,
+                        'by' => [
+                            0 => 'user',
+                        ],
+                        'data' => [
+                            'new_state' => 'open',
+                        ],
+                    ],
+                ],
+                'currentState' => 'open',
+                'updatedAt' => $t->getUpdatedAt()->getTimestamp(),
+                'updatedBy' => ['user'],
             ],
         ];
 
         // ticket with more features
         $ticket = new Ticket();
+
+        // added by action
+        new StateHistory(StateEnum::OPEN, $ticket, new \DateTimeImmutable('2024-06-16T00:00:00Z'));
+
+        // those are added by doctrine listeners
+        $ticket->setCreatedAt(new \DateTimeImmutable('2024-06-16T00:00:00Z'));
+        $ticket->setCreatedBy(new User());
+        $ticket->setUpdatedAt(new \DateTimeImmutable('2024-06-16T00:00:00Z'));
+        $ticket->setUpdatedBy(new User());
         $ticket->setExternalRef('2134');
         $personHistory = new PersonHistory(new Person(), $ticket, new \DateTimeImmutable('2024-04-01T12:00:00'));
         $ticketHistory = new MotiveHistory(new Motive(), $ticket, new \DateTimeImmutable('2024-04-01T12:02:00'));
@@ -92,6 +137,8 @@ class TicketNormalizerTest extends KernelTestCase
             $ticket,
             [
                 'type' => 'ticket_ticket',
+                'createdAt' => $ticket->getCreatedAt()?->getTimestamp(),
+                'createdBy' => ['user'],
                 'id' => null,
                 'externalRef' => '2134',
                 'currentPersons' => ['embedded'],
@@ -100,12 +147,18 @@ class TicketNormalizerTest extends KernelTestCase
                 'currentMotive' => ['type' => 'motive', 'id' => 0],
                 'history' => [
                     ['event_type' => 'add_person'],
+                    ['event_type' => 'persons_state'],
                     ['event_type' => 'set_motive'],
                     ['event_type' => 'add_comment'],
-                    ['event_type' => 'add_addressee'],
-                    ['event_type' => 'remove_addressee'],
-                    ['event_type' => 'add_addressee'],
+                    ['event_type' => 'addressees_state'],
+                    ['event_type' => 'addressees_state'],
+                    ['event_type' => 'addressees_state'],
+                    ['event_type' => 'create_ticket'],
+                    ['event_type' => 'state_change'],
                 ],
+                'currentState' => 'open',
+                'updatedAt' => $ticket->getUpdatedAt()->getTimestamp(),
+                'updatedBy' => ['user'],
             ],
         ];
     }
@@ -126,9 +179,7 @@ class TicketNormalizerTest extends KernelTestCase
             Argument::that(fn ($arg) => is_array($arg) && 0 < count($arg) && is_object($arg[0])),
             'json',
             Argument::type('array')
-        )->will(function ($args) {
-            return array_fill(0, count($args[0]), 'embedded');
-        });
+        )->will(fn ($args) => array_fill(0, count($args[0]), 'embedded'));
 
         // array of event type
         $normalizer->normalize(
@@ -144,10 +195,28 @@ class TicketNormalizerTest extends KernelTestCase
 
             return $events;
         });
+        // array of persons
+        $normalizer->normalize(
+            Argument::that(fn ($arg) => is_array($arg) && 1 === count($arg) && array_key_exists('persons', $arg)),
+            'json',
+            ['groups' => 'read']
+        )->will(fn ($args): array => ['persons' => []]);
+        // array of addresses
+        $normalizer->normalize(
+            Argument::that(fn ($arg) => is_array($arg) && 1 === count($arg) && array_key_exists('addressees', $arg)),
+            'json',
+            ['groups' => 'read']
+        )->will(fn ($args): array => ['addressees' => []]);
+        // state data
+        $normalizer->normalize(
+            Argument::that(fn ($arg) => is_array($arg) && 1 === count($arg) && array_key_exists('new_state', $arg)),
+            'json',
+            ['groups' => 'read']
+        )->will(fn ($args): array => $args[0]);
 
         // datetime
         $normalizer->normalize(Argument::type(\DateTimeImmutable::class), 'json', Argument::type('array'))
-            ->will(function ($args) { return $args[0]->getTimestamp(); });
+            ->will(fn ($args) => $args[0]->getTimestamp());
         // user
         $normalizer->normalize(Argument::type(User::class), 'json', Argument::type('array'))
             ->willReturn(['user']);