diff --git a/backend/backend.Tests/Controllers/AnnouncementsControllerTests.cs b/backend/backend.Tests/Controllers/AnnouncementsControllerTests.cs
index 2bbeb1c..7f74a95 100644
--- a/backend/backend.Tests/Controllers/AnnouncementsControllerTests.cs
+++ b/backend/backend.Tests/Controllers/AnnouncementsControllerTests.cs
@@ -239,9 +239,9 @@ public class AnnouncementsControllerTests : IDisposable
         var eventEntity = TestDataFactory.CreateEvent(organizerId: organizer.Id, status: EventStatus.Published);
         _context.Events.Add(eventEntity);
 
-        var published = TestDataFactory.CreateAnnouncement(eventEntity.Id, "Published", "Content");
+        var published = TestDataFactory.CreateAnnouncement(eventEntity.Id, "Published", "Content", organizer.Id);
         published.IsPublished = true;
-        var unpublished = TestDataFactory.CreateAnnouncement(eventEntity.Id, "Draft", "Content");
+        var unpublished = TestDataFactory.CreateAnnouncement(eventEntity.Id, "Draft", "Content", organizer.Id);
         unpublished.IsPublished = false;
         _context.Announcements.AddRange(published, unpublished);
         await _context.SaveChangesAsync();
@@ -271,9 +271,9 @@ public class AnnouncementsControllerTests : IDisposable
         var eventEntity = TestDataFactory.CreateEvent(organizerId: organizer.Id, status: EventStatus.Published);
         _context.Events.Add(eventEntity);
 
-        var published = TestDataFactory.CreateAnnouncement(eventEntity.Id, "Published", "Content");
+        var published = TestDataFactory.CreateAnnouncement(eventEntity.Id, "Published", "Content", organizer.Id);
         published.IsPublished = true;
-        var unpublished = TestDataFactory.CreateAnnouncement(eventEntity.Id, "Draft", "Content");
+        var unpublished = TestDataFactory.CreateAnnouncement(eventEntity.Id, "Draft", "Content", organizer.Id);
         unpublished.IsPublished = false;
         _context.Announcements.AddRange(published, unpublished);
         await _context.SaveChangesAsync();
@@ -335,7 +335,7 @@ public class AnnouncementsControllerTests : IDisposable
         var eventEntity = TestDataFactory.CreateEvent(organizerId: organizer.Id, status: EventStatus.Published);
         _context.Events.Add(eventEntity);
 
-        var announcement = TestDataFactory.CreateAnnouncement(eventEntity.Id, "Draft", "Content");
+        var announcement = TestDataFactory.CreateAnnouncement(eventEntity.Id, "Draft", "Content", organizer.Id);
         announcement.IsPublished = false;
         _context.Announcements.Add(announcement);
         await _context.SaveChangesAsync();
@@ -387,7 +387,7 @@ public class AnnouncementsControllerTests : IDisposable
         var eventEntity = TestDataFactory.CreateEvent(organizerId: organizer.Id, status: EventStatus.Published);
         _context.Events.Add(eventEntity);
 
-        var announcement = TestDataFactory.CreateAnnouncement(eventEntity.Id, "Title", "Content");
+        var announcement = TestDataFactory.CreateAnnouncement(eventEntity.Id, "Title", "Content", organizer.Id);
         _context.Announcements.Add(announcement);
         await _context.SaveChangesAsync();
 
@@ -416,7 +416,7 @@ public class AnnouncementsControllerTests : IDisposable
         var eventEntity = TestDataFactory.CreateEvent(organizerId: organizer.Id, status: EventStatus.Published);
         _context.Events.Add(eventEntity);
 
-        var announcement = TestDataFactory.CreateAnnouncement(eventEntity.Id, "To Delete", "Content");
+        var announcement = TestDataFactory.CreateAnnouncement(eventEntity.Id, "To Delete", "Content", organizer.Id);
         _context.Announcements.Add(announcement);
         await _context.SaveChangesAsync();
 
@@ -505,9 +505,9 @@ public class AnnouncementsControllerTests : IDisposable
         var registration = TestDataFactory.CreateRegistration(eventEntity.Id, participant.Id, RegistrationStatus.Confirmed);
         _context.Registrations.Add(registration);
 
-        var published = TestDataFactory.CreateAnnouncement(eventEntity.Id, "Published", "Content");
+        var published = TestDataFactory.CreateAnnouncement(eventEntity.Id, "Published", "Content", organizer.Id);
         published.IsPublished = true;
-        var unpublished = TestDataFactory.CreateAnnouncement(eventEntity.Id, "Unpublished", "Content");
+        var unpublished = TestDataFactory.CreateAnnouncement(eventEntity.Id, "Unpublished", "Content", organizer.Id);
         unpublished.IsPublished = false;
         _context.Announcements.AddRange(published, unpublished);
         await _context.SaveChangesAsync();