diff --git a/src/CoreBundle/Entity/Promotion.php b/src/CoreBundle/Entity/Promotion.php
index eb33487fc3..2f68ea2c9b 100644
--- a/src/CoreBundle/Entity/Promotion.php
+++ b/src/CoreBundle/Entity/Promotion.php
@@ -6,6 +6,7 @@ declare(strict_types=1);
 
 namespace Chamilo\CoreBundle\Entity;
 
+use Doctrine\Common\Collections\ArrayCollection;
 use Doctrine\Common\Collections\Collection;
 use Doctrine\ORM\Mapping as ORM;
 use Gedmo\Timestampable\Traits\TimestampableEntity;
@@ -51,12 +52,17 @@ class Promotion
     /**
      * @var Collection|Session[]
      *
-     * @ORM\OneToMany(
-     *     targetEntity="Chamilo\CoreBundle\Entity\Session", mappedBy="promotion", cascade={"persist"}
-     * )
+     * @ORM\OneToMany(targetEntity="Session", mappedBy="promotion", cascade={"persist"})
      */
     protected Collection $sessions;
 
+    /**
+     * @var Collection|SysAnnouncement[]
+     *
+     * @ORM\OneToMany(targetEntity="SysAnnouncement", mappedBy="promotion", cascade={"persist"})
+     */
+    protected Collection $announcements;
+
     /**
      * @ORM\Column(name="status", type="integer", nullable=false)
      */
@@ -65,6 +71,8 @@ class Promotion
     public function __construct()
     {
         $this->status = self::PROMOTION_STATUS_ACTIVE;
+        $this->announcements = new ArrayCollection();
+        $this->sessions = new ArrayCollection();
     }
 
     /**
@@ -84,12 +92,7 @@ class Promotion
         return $this;
     }
 
-    /**
-     * Get name.
-     *
-     * @return string
-     */
-    public function getName()
+    public function getName(): string
     {
         return $this->name;
     }
@@ -154,4 +157,22 @@ class Promotion
 
         return $this;
     }
+
+    /**
+     * @return SysAnnouncement[]|Collection
+     */
+    public function getAnnouncements()
+    {
+        return $this->announcements;
+    }
+
+    /**
+     * @param SysAnnouncement[]|Collection $announcements
+     */
+    public function setAnnouncements($announcements): self
+    {
+        $this->announcements = $announcements;
+
+        return $this;
+    }
 }
diff --git a/src/CoreBundle/Entity/Session.php b/src/CoreBundle/Entity/Session.php
index 7b7028ad6e..b3d7f3107b 100644
--- a/src/CoreBundle/Entity/Session.php
+++ b/src/CoreBundle/Entity/Session.php
@@ -312,7 +312,7 @@ class Session implements ResourceWithAccessUrlInterface
         return $this->getName();
     }
 
-    public function getDuration(): int
+    public function getDuration(): ?int
     {
         return $this->duration;
     }
diff --git a/src/CoreBundle/Entity/SysAnnouncement.php b/src/CoreBundle/Entity/SysAnnouncement.php
index e1ec02d495..af98ea9762 100644
--- a/src/CoreBundle/Entity/SysAnnouncement.php
+++ b/src/CoreBundle/Entity/SysAnnouncement.php
@@ -74,7 +74,7 @@ class SysAnnouncement
     protected ?Career $career = null;
 
     /**
-     * @ORM\ManyToOne(targetEntity="Chamilo\CoreBundle\Entity\Promotion")
+     * @ORM\ManyToOne(targetEntity="Chamilo\CoreBundle\Entity\Promotion", inversedBy="announcements")
      * @ORM\JoinColumn(name="promotion_id", referencedColumnName="id", onDelete="CASCADE")
      */
     protected ?Promotion $promotion = null;
diff --git a/tests/CoreBundle/Repository/PromotionRepositoryTest.php b/tests/CoreBundle/Repository/PromotionRepositoryTest.php
index 982065fb80..3d3821084c 100644
--- a/tests/CoreBundle/Repository/PromotionRepositoryTest.php
+++ b/tests/CoreBundle/Repository/PromotionRepositoryTest.php
@@ -30,16 +30,19 @@ class PromotionRepositoryTest extends AbstractApiTest
         $em->persist($career);
         $em->flush();
 
-        $item = (new Promotion())
+        $promotion = (new Promotion())
             ->setName('2000')
             ->setDescription('Promotion of 2000')
             ->setCareer($career)
             ->setStatus(1)
         ;
-        $this->assertHasNoEntityViolations($item);
-        $em->persist($item);
+        $this->assertHasNoEntityViolations($promotion);
+        $em->persist($promotion);
         $em->flush();
 
+        $this->assertSame(0, $promotion->getAnnouncements()->count());
+        $this->assertSame(0, $promotion->getSessions()->count());
+
         $this->assertSame($defaultCount + 1, $repo->count([]));
     }
 }
diff --git a/tests/CoreBundle/Repository/SessionRepositoryTest.php b/tests/CoreBundle/Repository/SessionRepositoryTest.php
index c96f30f982..133017a62b 100644
--- a/tests/CoreBundle/Repository/SessionRepositoryTest.php
+++ b/tests/CoreBundle/Repository/SessionRepositoryTest.php
@@ -44,8 +44,9 @@ class SessionRepositoryTest extends AbstractApiTest
 
         $this->assertSame(1, $repo->count([]));
 
+        $this->assertSame('session 1', (string) $session);
         $this->assertSame(0, \count($session->getAllUsersFromCourse(0)));
-
+        $this->assertSame(100, $session->getDuration());
         $this->assertTrue($session->isActiveForStudent());
 
         $this->assertTrue($session->isActiveForCoach());
diff --git a/tests/CoreBundle/Repository/SysAnnouncementRepositoryTest.php b/tests/CoreBundle/Repository/SysAnnouncementRepositoryTest.php
index d12b868c50..d92b166544 100644
--- a/tests/CoreBundle/Repository/SysAnnouncementRepositoryTest.php
+++ b/tests/CoreBundle/Repository/SysAnnouncementRepositoryTest.php
@@ -47,7 +47,28 @@ class SysAnnouncementRepositoryTest extends WebTestCase
         ;
         $em->persist($sysAnnouncement);
         $em->flush();
-        $count = $repo->count([]);
-        $this->assertSame(2, $count);
+
+        $repo->update($sysAnnouncement);
+
+        $this->assertSame(2, $repo->count([]));
+
+        $repo->delete($sysAnnouncement->getId());
+        $this->assertSame(1, $repo->count([]));
+    }
+
+    public function testGetVisibilityList(): void
+    {
+        self::bootKernel();
+        $repo = self::getContainer()->get(SysAnnouncementRepository::class);
+        $this->assertIsArray($repo->getVisibilityList());
+    }
+
+    public function testGetAnnouncements(): void
+    {
+        self::bootKernel();
+        $repo = self::getContainer()->get(SysAnnouncementRepository::class);
+        $user = $this->getUser('admin');
+        $items = $repo->getAnnouncements($user, $this->getAccessUrl(), 'en');
+        $this->assertSame(1, count($items));
     }
 }