diff --git a/SchengenVisaApi/VisaApiTests/Database/Repositories/ApplicantsRepositoryTests.cs b/SchengenVisaApi/VisaApiTests/Database/Repositories/ApplicantsRepositoryTests.cs
index da47582..8444290 100644
--- a/SchengenVisaApi/VisaApiTests/Database/Repositories/ApplicantsRepositoryTests.cs
+++ b/SchengenVisaApi/VisaApiTests/Database/Repositories/ApplicantsRepositoryTests.cs
@@ -11,11 +11,18 @@ namespace VisaApi.Database.Repositories
 {
     public class ApplicantsRepositoryTests
     {
+        /// <summary> Returns <see cref="IApplicantsRepository"/> </summary>
+        /// <param name="context"> Database context </param>
+        /// <returns>Repository</returns>
         private static IApplicantsRepository GetRepository(DbContext context)
             => new ApplicantsRepository(context, context);
 
+        /// <summary> Returns <see cref="IDateTimeProvider"/> </summary>
         private static IDateTimeProvider GetDateTimeProvider() => new TestDateTimeProvider();
 
+        /// <summary>
+        /// Test for <see cref="IApplicantsRepository.FindByUserIdAsync"/> method that should throw exception for not existing entity
+        /// </summary>
         [Fact]
         private async Task FindByUserIdForNotExistingShouldThrow()
         {
@@ -35,6 +42,9 @@ namespace VisaApi.Database.Repositories
             result.Should().NotBeNull();
         }
 
+        /// <summary>
+        /// Test for <see cref="IApplicantsRepository.FindByUserIdAsync"/> method that should return existing entity
+        /// </summary>
         [Fact]
         private async Task FindByUserIdForExistingShouldReturnApplicant()
         {
@@ -51,5 +61,89 @@ namespace VisaApi.Database.Repositories
 
             result.Should().BeEquivalentTo(applicant);
         }
+
+        /// <summary>
+        /// Test for <see cref="IApplicantsRepository.GetApplicantIdByUserId"/> method that should throw exception for not existing entity
+        /// </summary>
+        [Fact]
+        private async Task GetApplicantIdByUserIdForNotExistingShouldThrow()
+        {
+            await using var context = InMemoryContextProvider.GetDbContext();
+            var repository = GetRepository(context);
+            ApplicantNotFoundByUserIdException? result = null;
+
+            try
+            {
+                await repository.GetApplicantIdByUserId(Guid.NewGuid(), CancellationToken.None);
+            }
+            catch (Exception e)
+            {
+                result = e as ApplicantNotFoundByUserIdException;
+            }
+
+            result.Should().NotBeNull();
+        }
+
+        /// <summary>
+        /// Test for <see cref="IApplicantsRepository.GetApplicantIdByUserId"/> method that should return existing entity's identifier
+        /// </summary>
+        [Fact]
+        private async Task GetApplicantIdByUserIdForExistingShouldReturnApplicant()
+        {
+            await using var context = InMemoryContextProvider.GetDbContext();
+            var repository = GetRepository(context);
+            var user = new UserFaker().Generate();
+            var applicant = new ApplicantFaker(GetDateTimeProvider()).Generate();
+            applicant.UserId = user.Id;
+            await context.AddAsync(user);
+            await repository.AddAsync(applicant, CancellationToken.None);
+            await context.SaveChangesAsync();
+
+            var result = await repository.GetApplicantIdByUserId(user.Id, CancellationToken.None);
+
+            result.Should().Be(applicant.Id);
+        }
+
+        /// <summary>
+        /// Test for <see cref="IApplicantsRepository.IsApplicantNonResidentByUserId"/> method that should throw exception for not existing entity
+        /// </summary>
+        [Fact]
+        private async Task IsApplicantNonResidentByUserIdForNotExistingShouldThrow()
+        {
+            await using var context = InMemoryContextProvider.GetDbContext();
+            var repository = GetRepository(context);
+            ApplicantNotFoundByUserIdException? result = null;
+
+            try
+            {
+                await repository.IsApplicantNonResidentByUserId(Guid.NewGuid(), CancellationToken.None);
+            }
+            catch (Exception e)
+            {
+                result = e as ApplicantNotFoundByUserIdException;
+            }
+
+            result.Should().NotBeNull();
+        }
+
+        /// <summary>
+        /// Test for <see cref="IApplicantsRepository.IsApplicantNonResidentByUserId"/> method that should return existing entity's IsNonResident property
+        /// </summary>
+        [Fact]
+        private async Task IsApplicantNonResidentByUserIdForExistingShouldReturnApplicant()
+        {
+            await using var context = InMemoryContextProvider.GetDbContext();
+            var repository = GetRepository(context);
+            var user = new UserFaker().Generate();
+            var applicant = new ApplicantFaker(GetDateTimeProvider()).Generate();
+            applicant.UserId = user.Id;
+            await context.AddAsync(user);
+            await repository.AddAsync(applicant, CancellationToken.None);
+            await context.SaveChangesAsync();
+
+            var result = await repository.IsApplicantNonResidentByUserId(user.Id, CancellationToken.None);
+
+            result.Should().Be(applicant.IsNonResident);
+        }
     }
 }