diff --git a/Tests/TutorLizard.BusinessLogic.Tests/Services/Browse/BrowseServiceGetUsersScheduleTests.cs b/Tests/TutorLizard.BusinessLogic.Tests/Services/Browse/BrowseServiceGetUsersScheduleTests.cs
index b6bd30e8..35739bdd 100644
--- a/Tests/TutorLizard.BusinessLogic.Tests/Services/Browse/BrowseServiceGetUsersScheduleTests.cs
+++ b/Tests/TutorLizard.BusinessLogic.Tests/Services/Browse/BrowseServiceGetUsersScheduleTests.cs
@@ -1,4 +1,5 @@
-using TutorLizard.BusinessLogic.Models;
+
+using TutorLizard.BusinessLogic.Models;
 using TutorLizard.BusinessLogic.Models.DTOs;
 using TutorLizard.BusinessLogic.Models.DTOs.Requests;
 using TutorLizard.BusinessLogic.Services;
diff --git a/Tests/TutorLizard.BusinessLogic.Tests/Services/Tutor/TutorServiceCreateScheduleItemTests.cs b/Tests/TutorLizard.BusinessLogic.Tests/Services/Tutor/TutorServiceCreateScheduleItemTests.cs
new file mode 100644
index 00000000..d2ef5a39
--- /dev/null
+++ b/Tests/TutorLizard.BusinessLogic.Tests/Services/Tutor/TutorServiceCreateScheduleItemTests.cs
@@ -0,0 +1,86 @@
+using TutorLizard.BusinessLogic.Models.DTOs.Requests;
+using TutorLizard.BusinessLogic.Models;
+using Moq;
+
+namespace TutorLizard.BusinessLogic.Tests.Services.Tutor;
+
+public class TutorServiceCreateScheduleItemTests : TutorServiceTestsBase
+{
+    [Fact]
+    public async Task CreateScheduleItem_WhenUserIsOwner_ShouldReturnSuccess()
+    {
+        // Arrange
+        int usersAdCount = 20;
+        int usersScheduleItemRequestCount = 0;
+        var testUser = CreateTestUserAndAddToDb(usersAdCount, usersScheduleItemRequestCount);
+        var adId = testUser.Ads.First().Id;
+        var ad = new Ad { TutorId = testUser.Id };
+
+        MockAdRepository
+            .Setup(repo => repo.GetById(adId)).ReturnsAsync(ad);
+
+
+        var request = new CreateScheduleItemRequest()
+        {
+            UserId = testUser.Id,
+            AdId = adId,
+            DateTime = DateTime.Now
+        };
+        // Act
+        var response = await TutorService.CreateScheduleItem(request);
+        // Assert
+        Assert.True(response.Success);
+    }
+
+    [Fact]
+    public async Task CreateScheduleItem_WhenUserIsNotTheOwner_ShouldReturnFalse()
+    {
+        // Arrange
+        int usersAdCount = 20;
+        int usersScheduleItemRequestCount = 0;
+        var testUser = CreateTestUserAndAddToDb(usersAdCount, usersScheduleItemRequestCount);
+        var adId = testUser.Ads.First().Id;
+        var ad = new Ad { TutorId = -1 };
+
+        MockAdRepository
+            .Setup(repo => repo.GetById(adId)).ReturnsAsync(ad);
+
+
+        var request = new CreateScheduleItemRequest()
+        {
+            UserId = testUser.Id,
+            AdId = adId,
+            DateTime = DateTime.Now
+        };
+        // Act
+        var response = await TutorService.CreateScheduleItem(request);
+        // Assert
+        Assert.False(response.Success);
+    }    
+    
+    [Fact]
+    public async Task CreateScheduleItem_WhenAdIdIsIncorrect_ShouldReturnFalse()
+    {
+        // Arrange
+        int usersAdCount = 20;
+        int usersScheduleItemRequestCount = 0;
+        var testUser = CreateTestUserAndAddToDb(usersAdCount, usersScheduleItemRequestCount);
+        var adId = -1;
+        var ad = new Ad { TutorId = testUser.Id };
+
+        MockAdRepository
+            .Setup(repo => repo.GetById(adId)).ReturnsAsync(ad);
+
+
+        var request = new CreateScheduleItemRequest()
+        {
+            UserId = testUser.Id,
+            AdId = adId,
+            DateTime = DateTime.Now
+        };
+        // Act
+        var response = await TutorService.CreateScheduleItem(request);
+        // Assert
+        Assert.False(response.Success);
+    }    
+}
diff --git a/Tests/TutorLizard.BusinessLogic.Tests/Services/Tutor/TutorServiceGetTutorsScheduleForAdTests.cs b/Tests/TutorLizard.BusinessLogic.Tests/Services/Tutor/TutorServiceGetTutorsScheduleForAdTests.cs
new file mode 100644
index 00000000..ead5d040
--- /dev/null
+++ b/Tests/TutorLizard.BusinessLogic.Tests/Services/Tutor/TutorServiceGetTutorsScheduleForAdTests.cs
@@ -0,0 +1,31 @@
+using TutorLizard.BusinessLogic.Models.DTOs.Requests;
+using Moq;
+
+namespace TutorLizard.BusinessLogic.Tests.Services.Tutor;
+
+public class TutorServiceGetTutorsScheduleForAdTests : TutorServiceTestsBase
+{
+    [Fact]
+    public async Task GetTutorsScheduleForAd_WhenScheduleIsNotNull_ShouldNotReturnEmptyValue()
+    {
+        // Assign
+        var adId = 1;
+        int requestCount = 100;
+        var scheduleItems = CreateTestScheduleItems(requestCount);
+
+        MockScheduleItemRepository
+            .Setup(repo => repo.GetAll())
+            .ReturnsAsync(scheduleItems);
+
+        var request = new TutorsScheduleForAdRequest
+        {
+            AdId = adId
+        };
+
+        // Act
+        var response = await TutorService.GetTutorsScheduleForAd(request);
+
+        // Assert
+        Assert.Equal(scheduleItems.Count, response.ScheduleItems.Count);
+    }
+}
diff --git a/Tests/TutorLizard.BusinessLogic.Tests/Services/Tutor/TutorServiceIsUserTheAdOwnerTests.cs b/Tests/TutorLizard.BusinessLogic.Tests/Services/Tutor/TutorServiceIsUserTheAdOwnerTests.cs
new file mode 100644
index 00000000..e66c8fd9
--- /dev/null
+++ b/Tests/TutorLizard.BusinessLogic.Tests/Services/Tutor/TutorServiceIsUserTheAdOwnerTests.cs
@@ -0,0 +1,60 @@
+using Moq;
+using TutorLizard.BusinessLogic.Models;
+using TutorLizard.BusinessLogic.Models.DTOs.Requests;
+using TutorLizard.BusinessLogic.Models.DTOs.Responses;
+using TutorLizard.BusinessLogic.Services;
+
+namespace TutorLizard.BusinessLogic.Tests.Services.Tutor;
+
+public class TutorServiceIsUserTheAdOwnerTests : TutorServiceTestsBase
+{
+    [Fact]
+    public async Task IsUserTheAdOwner_UserIsOwner_ShouldReturnTrue()
+    {
+        // Arrange
+        int usersAdCount = 20;
+        int usersScheduleItemRequestCount = 0;
+        var testUser = CreateTestUserAndAddToDb(usersAdCount, usersScheduleItemRequestCount);       
+        var adId = testUser.Ads.First().Id;
+        var ad = new Ad { TutorId = testUser.Id };
+
+        MockAdRepository
+            .Setup(repo => repo.GetById(adId)).ReturnsAsync(ad);
+
+        var request = new IsUserTheAdOwnerRequest(adId,testUser.Id)
+        {
+            UserId = testUser.Id,
+            AdId = adId           
+        };
+        // Act
+        var response = await TutorService.IsUserTheAdOwner(request);
+
+        // Assert
+        Assert.True(response.IsOwner);
+    }
+
+    [Fact]
+    public async Task IsUserTheAdOwner_UserIsOwner_ShouldReturnFalse()
+    {
+        // Arrange
+        int usersAdCount = 20;
+        int usersScheduleItemRequestCount = 0;
+        var testUser = CreateTestUserAndAddToDb(usersAdCount, usersScheduleItemRequestCount);       
+        var adId = testUser.Ads.First().Id;
+        var ad = new Ad { TutorId = -1 };
+
+        MockAdRepository
+            .Setup(repo => repo.GetById(adId)).ReturnsAsync(ad);
+
+        var request = new IsUserTheAdOwnerRequest(adId,testUser.Id)
+        {
+            UserId = testUser.Id, 
+            AdId = adId           
+        };
+        // Act
+        var response = await TutorService.IsUserTheAdOwner(request);
+
+        // Assert
+        Assert.False(response.IsOwner);
+    }
+}
diff --git a/Tests/TutorLizard.BusinessLogic.Tests/Services/Tutor/TutorServiceTestsBase.cs b/Tests/TutorLizard.BusinessLogic.Tests/Services/Tutor/TutorServiceTestsBase.cs
new file mode 100644
index 00000000..bc70a776
--- /dev/null
+++ b/Tests/TutorLizard.BusinessLogic.Tests/Services/Tutor/TutorServiceTestsBase.cs
@@ -0,0 +1,199 @@
+using AutoFixture;
+using Moq;
+using TutorLizard.BusinessLogic.Interfaces.Data.Repositories;
+using TutorLizard.BusinessLogic.Models;
+using TutorLizard.BusinessLogic.Services;
+
+namespace TutorLizard.BusinessLogic.Tests.Services.Tutor;
+
+public class TutorServiceTestsBase : TestsWithInMemoryDbBase
+{
+    protected TutorService TutorService;
+    protected Fixture Fixture = new();
+    protected Mock<IDbRepository<ScheduleItem>> MockScheduleItemRepository = new();
+    protected Mock<IDbRepository<ScheduleItemRequest>> MockScheduleItemRequestRepository = new();
+    protected Mock<IDbRepository<Ad>> MockAdRepository = new();
+    protected Mock<IDbRepository<AdRequest>> MockAdRequestRepository = new();
+
+    protected TutorServiceTestsBase() : base()
+    {
+        TutorService = new(MockScheduleItemRepository.Object,
+                           MockScheduleItemRequestRepository.Object,
+                           MockAdRequestRepository.Object,
+                           MockAdRepository.Object);
+    }
+
+    protected void SetupMockGetAllScheduleItems(List<ScheduleItem> scheduleItems) 
+    {
+        var scheduleItemsInDb = AddEntitiesToInMemoryDb(scheduleItems);
+
+        MockScheduleItemRepository
+            .Setup(x => x.GetAll())
+            .Returns(scheduleItemsInDb);
+    }
+    protected void SetupMockGetScheduleItemById(ScheduleItem? scheduleItem) 
+    {
+        MockScheduleItemRepository
+            .Setup(x => x.GetById(It.IsAny<int>()))
+            .Returns(Task.FromResult(scheduleItem));
+    }
+    protected void SetupMockGetAllScheduleItemRequests(List<ScheduleItemRequest> scheduleItemRequests)
+    {
+        var scheduleItemRequestsInDb = AddEntitiesToInMemoryDb(scheduleItemRequests);
+
+        MockScheduleItemRequestRepository
+            .Setup(x => x.GetAll())
+            .Returns(scheduleItemRequestsInDb);
+    }
+    protected void SetupMockGetScheduleItemRequestById(ScheduleItemRequest? scheduleItemRequest) 
+    {
+        MockScheduleItemRequestRepository
+            .Setup(x => x.GetById(It.IsAny<int>()))
+            .Returns(Task.FromResult(scheduleItemRequest));
+    }
+    protected void SetupMockGetAllAds(List<Ad> ads)
+    {
+        var adsInDb = AddEntitiesToInMemoryDb(ads);
+
+        MockAdRepository
+            .Setup(x => x.GetAll())
+            .Returns(adsInDb);
+    }
+    protected void SetupMockGetAdById(Ad? ad) 
+    {
+        MockAdRepository
+            .Setup(x => x.GetById(It.IsAny<int>()))
+            .Returns(Task.FromResult(ad));
+    }
+    protected void SetupMockGetAllAdRequests(List<AdRequest> adRequests) 
+    {
+        var adRequestsInDb = AddEntitiesToInMemoryDb (adRequests);
+
+        MockAdRequestRepository
+            .Setup(x => x.GetAll())
+            .Returns(adRequestsInDb);
+    }
+    protected void SetupMockGetAdRequestById(AdRequest? adRequest) 
+    {
+        MockAdRequestRepository
+            .Setup(x => x.GetById(It.IsAny<int>()))
+            .Returns(Task.FromResult(adRequest));
+    }
+    protected IQueryable<TEntity> AddEntitiesToInMemoryDb<TEntity>(List<TEntity> entities)
+    where TEntity : class
+    {
+        DbContext
+            .Set<TEntity>()
+            .AddRange(entities);
+        DbContext.SaveChanges();
+
+        return DbContext
+            .Set<TEntity>()
+            .AsQueryable();
+    }
+
+    protected User CreateTestUserAndAddToDb(int usersAdCount = 0, int usersScheduleItemRequestCount = 0)
+    {
+        User user = CreateTestUser();
+        user.Ads = CreateTestAds(usersAdCount);
+        user.ScheduleItemRequests = CreateTestScheduleItemRequests(usersScheduleItemRequestCount);
+        AddEntitiesToInMemoryDb([user]);
+        return user;
+    }
+
+    protected List<Ad> CreateTestAds(int adCount)
+    {
+        List<Ad> ads = Fixture
+            .Build<Ad>()
+                .Without(ad => ad.Id)
+                .Without(ad => ad.AdRequests)
+                .Without(ad => ad.ScheduleItems)
+                .With(ad => ad.User, CreateTestUser())
+                .With(ad => ad.Category, CreateTestCategory())
+                .With(ad => ad.Price, Math.Abs(Fixture.Create<decimal>()))
+            .CreateMany(adCount)
+            .ToList();
+
+        return ads;
+    }
+
+    protected List<AdRequest> CreateTestAdRequests(int adRequestCount)
+    {
+        List<AdRequest> adreqs = Fixture
+            .Build<AdRequest>()
+                .Without(adreq => adreq.Id)
+                .Without(adreq => adreq.User)
+                .Without(adreq => adreq.Ad)
+                .With(adreq=> adreq.User, CreateTestUser())
+                .With(adreq => adreq.Message, Fixture.Create<string>())
+                .With(adreq => adreq.IsRemote, Fixture.Create<bool>())
+                .With(adreq => adreq.IsRemote, Fixture.Create<bool>())
+            .CreateMany(adRequestCount)
+            .ToList();
+
+        return adreqs;
+    }
+
+    protected User CreateTestUser()
+    {
+        User user = Fixture
+            .Build<User>()
+                .Without(user => user.Ads)
+                .Without(user => user.AdRequests)
+                .Without(user => user.ScheduleItemRequests)
+            .Create();
+
+        return user;
+    }
+
+    protected Category CreateTestCategory()
+    {
+        Category category = Fixture
+            .Build<Category>()
+                .Without(category => category.Ads)
+            .Create();
+
+        return category;
+    }
+    protected List<ScheduleItemRequest> CreateTestScheduleItemRequests(int requestCount)
+    {
+        List<ScheduleItemRequest> requests = Fixture
+            .Build<ScheduleItemRequest>()
+                .Without(request => request.Id)
+                .Without(request => request.ScheduleItem)
+                .With(request => request.User, CreateTestUser())
+            .CreateMany(requestCount)
+            .ToList();
+
+        return requests;
+    }
+
+    protected List<ScheduleItem> CreateTestScheduleItems(int scheduleItemCount)
+    {
+        var ads = CreateTestAds(scheduleItemCount);
+
+        List<ScheduleItem> scheduleItems = Fixture
+            .Build<ScheduleItem>()
+                .Without(item => item.Id)
+                .Without(item => item.Ad)
+                .Without(item => item.ScheduleItemRequests)
+            .CreateMany(scheduleItemCount)
+            .ToList();
+
+        return scheduleItems;
+    }
+    protected List<ScheduleItem> CreateTestScheduleItemsAsQuerable(int scheduleItemCount)
+    {
+        var ads = CreateTestAds(scheduleItemCount);
+
+        List<ScheduleItem> scheduleItems = Fixture
+            .Build<ScheduleItem>()
+                .Without(item => item.Id)
+                .Without(item => item.Ad)
+                .Without(item => item.ScheduleItemRequests)
+            .CreateMany(scheduleItemCount)
+            .ToList();
+
+        return scheduleItems;
+    }
+}