diff --git a/AsbCloudApp/Services/ICrudService.cs b/AsbCloudApp/Services/ICrudService.cs
index 859e8fd4..37dff698 100644
--- a/AsbCloudApp/Services/ICrudService.cs
+++ b/AsbCloudApp/Services/ICrudService.cs
@@ -69,7 +69,7 @@ namespace AsbCloudApp.Services
         /// </summary>
         /// <param name="id"></param>
         /// <param name="token"></param>
-        /// <returns>если больше 0 - Id записи, если меньше 0 - код ошибки</returns>
+        /// <returns>количество добавленных, если меньше 0 - код ошибки</returns>
         Task<int> DeleteAsync(int id, CancellationToken token);
     }
 #nullable disable
diff --git a/AsbCloudInfrastructure/Services/CrudServiceBase.cs b/AsbCloudInfrastructure/Services/CrudServiceBase.cs
index 57cda971..c3e9fdb2 100644
--- a/AsbCloudInfrastructure/Services/CrudServiceBase.cs
+++ b/AsbCloudInfrastructure/Services/CrudServiceBase.cs
@@ -94,25 +94,32 @@ namespace AsbCloudInfrastructure.Services
         {
             var entity = Convert(item);
             entity.Id = 0;
-            dbSet.Add(entity);
+            var entry = dbSet.Add(entity);            
             await dbContext.SaveChangesAsync(token);
+            entry.State = EntityState.Detached;
             return entity.Id;
         }
 
         /// <inheritdoc/>
-        public virtual Task<int> InsertRangeAsync(IEnumerable<TDto> items, CancellationToken token = default)
+        public virtual async Task<int> InsertRangeAsync(IEnumerable<TDto> items, CancellationToken token = default)
         {
             if (!items.Any())
-                return Task.FromResult(0);
+                return 0;
             var entities = items.Select(i =>
             {
                 var entity = Convert(i);
                 entity.Id = 0;
                 return entity;
             });
-
-            dbSet.AddRange(entities);
-            return dbContext.SaveChangesAsync(token);
+            var entries = new List<Microsoft.EntityFrameworkCore.ChangeTracking.EntityEntry>(items.Count());
+            foreach (var entity in entities)
+            {
+                var entry = dbSet.Add(entity);
+                entries.Add(entry);
+            }
+            var affected = await dbContext.SaveChangesAsync(token);
+            entries.ForEach(e => e.State = EntityState.Detached);
+            return affected;
         }
 
         /// <inheritdoc/>
@@ -122,11 +129,14 @@ namespace AsbCloudInfrastructure.Services
                 .AsNoTracking()
                 .FirstOrDefaultAsync(e => e.Id == item.Id, token)
                 .ConfigureAwait(false);
+            
             if (existingEntity is null)
                 return ICrudService<TDto>.ErrorIdNotFound;
+            
             var entity = Convert(item);
             var entry = dbSet.Update(entity);
             await dbContext.SaveChangesAsync(token);
+            entry.State = EntityState.Detached;
             return entry.Entity.Id;
         }
 
@@ -138,8 +148,10 @@ namespace AsbCloudInfrastructure.Services
                 .FirstOrDefault(e => e.Id == id);
             if (entity == default)
                 return Task.FromResult(ICrudService<TDto>.ErrorIdNotFound);
-            dbSet.Remove(entity);
-            return dbContext.SaveChangesAsync(token);
+            var entry = dbSet.Remove(entity);
+            var affected = dbContext.SaveChangesAsync(token);
+            entry.State = EntityState.Detached;
+            return affected;
         }
 
         protected virtual TDto Convert(TEntity src) => src.Adapt<TDto>();
diff --git a/AsbCloudWebApi.Tests/ServicesTests/CrudServiceTest.cs b/AsbCloudWebApi.Tests/ServicesTests/CrudServiceTestAbstract.cs
similarity index 64%
rename from AsbCloudWebApi.Tests/ServicesTests/CrudServiceTest.cs
rename to AsbCloudWebApi.Tests/ServicesTests/CrudServiceTestAbstract.cs
index 0b94eaf1..043af57f 100644
--- a/AsbCloudWebApi.Tests/ServicesTests/CrudServiceTest.cs
+++ b/AsbCloudWebApi.Tests/ServicesTests/CrudServiceTestAbstract.cs
@@ -1,7 +1,5 @@
-using AsbCloudApp.Data;
-using AsbCloudApp.Services;
-using AsbCloudDb.Model;
-using AsbCloudInfrastructure.Services;
+using AsbCloudApp.Services;
+using System;
 using System.Linq;
 using System.Threading;
 using System.Threading.Tasks;
@@ -9,27 +7,6 @@ using Xunit;
 
 namespace AsbCloudWebApi.Tests.ServicesTests
 {
-    public class DepositCrudServiceTest : CrudServiceTestAbstract<DepositDto>
-    {
-        protected override DepositDto MakeNewItem()
-        {
-            var item = new DepositDto
-            {
-                Caption = "test deposit",
-                Latitude = 1,
-                Longitude = 2,
-                Timezone = new SimpleTimezoneDto { Hours = 5, TimezoneId = "test Never-land"}
-            };
-            return item;
-        }
-
-        protected override ICrudService<DepositDto> MakeService()
-        {
-            var dbContext = TestHelpter.MakeTestContext();
-            return new CrudCacheServiceBase<DepositDto, Deposit>(dbContext);
-        }
-    }
-
     public abstract class CrudServiceTestAbstract<TDto>
         where TDto: AsbCloudApp.Data.IId
     {
@@ -37,6 +14,7 @@ namespace AsbCloudWebApi.Tests.ServicesTests
 
         public CrudServiceTestAbstract()
         {
+            AsbCloudInfrastructure.DependencyInjection.MapsterSetup();
             service = MakeService();
         }
 
@@ -44,11 +22,12 @@ namespace AsbCloudWebApi.Tests.ServicesTests
         protected abstract TDto MakeNewItem();
 
         [Fact]
-        public async Task Insert()
+        public async Task<int> Insert()
         {
             var newItem = MakeNewItem();
             var id = await service.InsertAsync(newItem, CancellationToken.None);
             Assert.True(id > 0);
+            return id;
         }
 
         [Fact]
@@ -64,8 +43,7 @@ namespace AsbCloudWebApi.Tests.ServicesTests
         [Fact]
         public async Task GetById()
         {
-            var newItem = MakeNewItem();
-            var id = await service.InsertAsync(newItem, CancellationToken.None);
+            var id = await Insert();
             var gotItem = await service.GetAsync(id, CancellationToken.None);
             Assert.True(id > 0);
             Assert.Equal(id, gotItem.Id);
@@ -83,14 +61,25 @@ namespace AsbCloudWebApi.Tests.ServicesTests
             Assert.Equal(count + 1, newCount);
         }
 
+        [Fact]
+        public async Task UpdateAsync_returns_notfound()
+        {
+            var item = MakeNewItem();
+            item.Id = int.MaxValue - 1;
+            var updatedId = await service.UpdateAsync(item, CancellationToken.None);
+            Assert.True(updatedId < 0);
+        }
+
         [Fact]
         public async Task UpdateAsync()
         {
             var newItem = MakeNewItem();
-            var id = await service.InsertAsync(newItem, CancellationToken.None);
-            var updatedId = await service.UpdateAsync(newItem, CancellationToken.None);
-            Assert.True(id > 0);
-            Assert.Equal(id, updatedId);
+            newItem.Id = await service.InsertAsync(newItem, CancellationToken.None);
+            var item = MakeNewItem();
+            item.Id = newItem.Id;
+            var updatedId = await service.UpdateAsync(item, CancellationToken.None);
+            Assert.True(newItem.Id > 0);
+            Assert.Equal(newItem.Id, updatedId);
         }
 
         [Fact]
diff --git a/AsbCloudWebApi.Tests/ServicesTests/DepositCrudCacheServiceTest.cs b/AsbCloudWebApi.Tests/ServicesTests/DepositCrudCacheServiceTest.cs
new file mode 100644
index 00000000..d7769352
--- /dev/null
+++ b/AsbCloudWebApi.Tests/ServicesTests/DepositCrudCacheServiceTest.cs
@@ -0,0 +1,28 @@
+using AsbCloudApp.Data;
+using AsbCloudApp.Services;
+using AsbCloudDb.Model;
+using AsbCloudInfrastructure.Services;
+
+namespace AsbCloudWebApi.Tests.ServicesTests
+{
+    public class DepositCrudCacheServiceTest : CrudServiceTestAbstract<DepositDto>
+    {
+        protected override DepositDto MakeNewItem()
+        {
+            var item = new DepositDto
+            {
+                Caption = "test deposit",
+                Latitude = 1,
+                Longitude = 2,
+                Timezone = new SimpleTimezoneDto { Hours = 5, TimezoneId = "test Never-land"}
+            };
+            return item;
+        }
+
+        protected override ICrudService<DepositDto> MakeService()
+        {
+            var dbContext = TestHelpter.MakeTestContext();
+            return new CrudCacheServiceBase<DepositDto, Deposit>(dbContext);
+        }
+    }
+}