diff --git a/SchengenVisaApi/VisaApiTests/Tests/Infrastructure/Database/Repositories/ApplicantsRepositoryTests.cs b/SchengenVisaApi/VisaApiTests/Tests/Infrastructure/Database/Repositories/ApplicantsRepositoryTests.cs
index 8cdd5a3..23099a6 100644
--- a/SchengenVisaApi/VisaApiTests/Tests/Infrastructure/Database/Repositories/ApplicantsRepositoryTests.cs
+++ b/SchengenVisaApi/VisaApiTests/Tests/Infrastructure/Database/Repositories/ApplicantsRepositoryTests.cs
@@ -14,8 +14,8 @@ namespace VisaApi.Tests.Infrastructure.Database.Repositories
     [Collection(Collections.ContextUsingTestCollection)]
     public class ApplicantsRepositoryTests
     {
-        private static UserFaker userFaker = new();
-        private static ApplicantFaker applicantFaker = new(GetDateTimeProvider());
+        private readonly static UserFaker userFaker = new();
+        private readonly static ApplicantFaker applicantFaker = new(GetDateTimeProvider());
 
         /// <summary> Returns <see cref="IApplicantsRepository"/> </summary>
         /// <param name="context"> Database context </param>
diff --git a/SchengenVisaApi/VisaApiTests/Tests/Infrastructure/Database/Repositories/UsersRepositoryTests.cs b/SchengenVisaApi/VisaApiTests/Tests/Infrastructure/Database/Repositories/UsersRepositoryTests.cs
index 834aa81..3fc3e9a 100644
--- a/SchengenVisaApi/VisaApiTests/Tests/Infrastructure/Database/Repositories/UsersRepositoryTests.cs
+++ b/SchengenVisaApi/VisaApiTests/Tests/Infrastructure/Database/Repositories/UsersRepositoryTests.cs
@@ -12,7 +12,7 @@ namespace VisaApi.Tests.Infrastructure.Database.Repositories
     [Collection(Collections.ContextUsingTestCollection)]
     public class UsersRepositoryTests
     {
-        private UserFaker userFaker = new();
+        private readonly static UserFaker userFaker = new();
 
         /// <summary> Returns <see cref="IVisaApplicationsRepository"/> </summary>
         /// <param name="context"> Database context </param>
diff --git a/SchengenVisaApi/VisaApiTests/Tests/Infrastructure/Database/Repositories/VisaApplicationsRepositoryTests.cs b/SchengenVisaApi/VisaApiTests/Tests/Infrastructure/Database/Repositories/VisaApplicationsRepositoryTests.cs
index d18db91..80de943 100644
--- a/SchengenVisaApi/VisaApiTests/Tests/Infrastructure/Database/Repositories/VisaApplicationsRepositoryTests.cs
+++ b/SchengenVisaApi/VisaApiTests/Tests/Infrastructure/Database/Repositories/VisaApplicationsRepositoryTests.cs
@@ -16,9 +16,9 @@ namespace VisaApi.Tests.Infrastructure.Database.Repositories
     [Collection(Collections.ContextUsingTestCollection)]
     public class VisaApplicationsRepositoryTests
     {
-        private UserFaker userFaker = new();
-        private ApplicantFaker applicantFaker = new(GetDateTimeProvider());
-        private VisaApplicationFaker applicationFaker = new(GetDateTimeProvider());
+        private readonly static UserFaker userFaker = new();
+        private readonly static ApplicantFaker applicantFaker = new(GetDateTimeProvider());
+        private readonly static VisaApplicationFaker applicationFaker = new(GetDateTimeProvider());
 
         /// <summary> Returns <see cref="IVisaApplicationsRepository"/> </summary>
         /// <param name="context"> Database context </param>