diff --git a/modules/account/test/Volo.Abp.Account.Application.Tests/Volo/Abp/Account/AbpAccountApplicationTestBase.cs b/modules/account/test/Volo.Abp.Account.Application.Tests/Volo/Abp/Account/AbpAccountApplicationTestBase.cs
index 38f1506a76..99a2eed68e 100644
--- a/modules/account/test/Volo.Abp.Account.Application.Tests/Volo/Abp/Account/AbpAccountApplicationTestBase.cs
+++ b/modules/account/test/Volo.Abp.Account.Application.Tests/Volo/Abp/Account/AbpAccountApplicationTestBase.cs
@@ -1,4 +1,6 @@
-namespace Volo.Abp.Account
+using Volo.Abp.Testing;
+
+namespace Volo.Abp.Account
 {
     public class AbpAccountApplicationTestBase : AbpIntegratedTest<AbpAccountApplicationTestModule>
     {
diff --git a/modules/audit-logging/test/Volo.Abp.AuditLogging.TestBase/Volo/Abp/AuditLogging/AuditLoggingTestBase.cs b/modules/audit-logging/test/Volo.Abp.AuditLogging.TestBase/Volo/Abp/AuditLogging/AuditLoggingTestBase.cs
index 6cbe6bd126..f7378f74dc 100644
--- a/modules/audit-logging/test/Volo.Abp.AuditLogging.TestBase/Volo/Abp/AuditLogging/AuditLoggingTestBase.cs
+++ b/modules/audit-logging/test/Volo.Abp.AuditLogging.TestBase/Volo/Abp/AuditLogging/AuditLoggingTestBase.cs
@@ -1,4 +1,5 @@
 using Volo.Abp.Modularity;
+using Volo.Abp.Testing;
 
 namespace Volo.Abp.AuditLogging
 {
diff --git a/modules/background-jobs/test/Volo.Abp.BackgroundJobs.TestBase/Volo/Abp/BackgroundJobs/BackgroundJobsTestBase.cs b/modules/background-jobs/test/Volo.Abp.BackgroundJobs.TestBase/Volo/Abp/BackgroundJobs/BackgroundJobsTestBase.cs
index ea7b932a79..c87edcd788 100644
--- a/modules/background-jobs/test/Volo.Abp.BackgroundJobs.TestBase/Volo/Abp/BackgroundJobs/BackgroundJobsTestBase.cs
+++ b/modules/background-jobs/test/Volo.Abp.BackgroundJobs.TestBase/Volo/Abp/BackgroundJobs/BackgroundJobsTestBase.cs
@@ -1,5 +1,6 @@
 using Volo.Abp;
 using Volo.Abp.Modularity;
+using Volo.Abp.Testing;
 
 namespace Volo.Abp.BackgroundJobs
 {
diff --git a/modules/blogging/test/Volo.Blogging.TestBase/Volo/Blogging/BloggingTestBase.cs b/modules/blogging/test/Volo.Blogging.TestBase/Volo/Blogging/BloggingTestBase.cs
index 69b752a32b..5b5a9718e6 100644
--- a/modules/blogging/test/Volo.Blogging.TestBase/Volo/Blogging/BloggingTestBase.cs
+++ b/modules/blogging/test/Volo.Blogging.TestBase/Volo/Blogging/BloggingTestBase.cs
@@ -4,6 +4,7 @@ using NSubstitute;
 using Volo.Abp;
 using Volo.Abp.Modularity;
 using Volo.Abp.Users;
+using Volo.Abp.Testing;
 
 namespace Volo.Blogging
 {
diff --git a/modules/docs/test/Volo.Docs.TestBase/Volo/Docs/DocsTestBase.cs b/modules/docs/test/Volo.Docs.TestBase/Volo/Docs/DocsTestBase.cs
index 6073b65e03..ec8270ae01 100644
--- a/modules/docs/test/Volo.Docs.TestBase/Volo/Docs/DocsTestBase.cs
+++ b/modules/docs/test/Volo.Docs.TestBase/Volo/Docs/DocsTestBase.cs
@@ -6,6 +6,7 @@ using Octokit;
 using Volo.Abp;
 using Volo.Abp.Modularity;
 using Volo.Docs.GitHub.Documents;
+using Volo.Abp.Testing;
 
 namespace Volo.Docs
 {
diff --git a/modules/identityserver/test/Volo.Abp.IdentityServer.Domain.Tests/Volo/Abp/IdentityServer/AbpIdentityServerDomainTestBase.cs b/modules/identityserver/test/Volo.Abp.IdentityServer.Domain.Tests/Volo/Abp/IdentityServer/AbpIdentityServerDomainTestBase.cs
index 009c6ca468..5b9c9240bf 100644
--- a/modules/identityserver/test/Volo.Abp.IdentityServer.Domain.Tests/Volo/Abp/IdentityServer/AbpIdentityServerDomainTestBase.cs
+++ b/modules/identityserver/test/Volo.Abp.IdentityServer.Domain.Tests/Volo/Abp/IdentityServer/AbpIdentityServerDomainTestBase.cs
@@ -1,4 +1,6 @@
-namespace Volo.Abp.IdentityServer
+using Volo.Abp.Testing;
+
+namespace Volo.Abp.IdentityServer
 {
     public class AbpIdentityServerDomainTestBase : AbpIntegratedTest<AbpIdentityServerDomainTestModule>
     {
diff --git a/modules/identityserver/test/Volo.Abp.IdentityServer.EntityFrameworkCore.Tests/Volo/Abp/IdentityServer/AbpIdentityApplicationTestBase.cs b/modules/identityserver/test/Volo.Abp.IdentityServer.EntityFrameworkCore.Tests/Volo/Abp/IdentityServer/AbpIdentityApplicationTestBase.cs
index b102a72329..f66709e5d1 100644
--- a/modules/identityserver/test/Volo.Abp.IdentityServer.EntityFrameworkCore.Tests/Volo/Abp/IdentityServer/AbpIdentityApplicationTestBase.cs
+++ b/modules/identityserver/test/Volo.Abp.IdentityServer.EntityFrameworkCore.Tests/Volo/Abp/IdentityServer/AbpIdentityApplicationTestBase.cs
@@ -1,4 +1,6 @@
-namespace Volo.Abp.IdentityServer
+using Volo.Abp.Testing;
+
+namespace Volo.Abp.IdentityServer
 {
     public class AbpIdentityServerTestBase : AbpIntegratedTest<AbpIdentityServerTestEntityFrameworkCoreModule>
     {
diff --git a/modules/identityserver/test/Volo.Abp.IdentityServer.TestBase/Volo/Abp/IdentityServer/AbpIdentityServerTestBase.cs b/modules/identityserver/test/Volo.Abp.IdentityServer.TestBase/Volo/Abp/IdentityServer/AbpIdentityServerTestBase.cs
index a78caec8d0..ca3eebd260 100644
--- a/modules/identityserver/test/Volo.Abp.IdentityServer.TestBase/Volo/Abp/IdentityServer/AbpIdentityServerTestBase.cs
+++ b/modules/identityserver/test/Volo.Abp.IdentityServer.TestBase/Volo/Abp/IdentityServer/AbpIdentityServerTestBase.cs
@@ -2,6 +2,7 @@
 using System.Collections.Generic;
 using System.Text;
 using Volo.Abp.Modularity;
+using Volo.Abp.Testing;
 
 namespace Volo.Abp.IdentityServer
 {
diff --git a/modules/tenant-management/test/Volo.Abp.TenantManagement.TestBase/Volo/Abp/TenantManagement/TenantManagementTestBase.cs b/modules/tenant-management/test/Volo.Abp.TenantManagement.TestBase/Volo/Abp/TenantManagement/TenantManagementTestBase.cs
index eee575ba5f..a5e041c5f3 100644
--- a/modules/tenant-management/test/Volo.Abp.TenantManagement.TestBase/Volo/Abp/TenantManagement/TenantManagementTestBase.cs
+++ b/modules/tenant-management/test/Volo.Abp.TenantManagement.TestBase/Volo/Abp/TenantManagement/TenantManagementTestBase.cs
@@ -1,4 +1,5 @@
 using Volo.Abp.Modularity;
+using Volo.Abp.Testing;
 
 namespace Volo.Abp.TenantManagement
 {
diff --git a/modules/users/test/Volo.Abp.Users.Tests.Shared/Volo/Abp/Users/AbpUsersTestBase.cs b/modules/users/test/Volo.Abp.Users.Tests.Shared/Volo/Abp/Users/AbpUsersTestBase.cs
index 2d90e59d4a..e36f485a70 100644
--- a/modules/users/test/Volo.Abp.Users.Tests.Shared/Volo/Abp/Users/AbpUsersTestBase.cs
+++ b/modules/users/test/Volo.Abp.Users.Tests.Shared/Volo/Abp/Users/AbpUsersTestBase.cs
@@ -1,4 +1,5 @@
 using Volo.Abp.Modularity;
+using Volo.Abp.Testing;
 
 namespace Volo.Abp.Users
 {
diff --git a/samples/BookStore-Angular-MongoDb/aspnet-core/test/Acme.BookStore.TestBase/BookStoreTestBase.cs b/samples/BookStore-Angular-MongoDb/aspnet-core/test/Acme.BookStore.TestBase/BookStoreTestBase.cs
index 225ab01776..0f44532e7a 100644
--- a/samples/BookStore-Angular-MongoDb/aspnet-core/test/Acme.BookStore.TestBase/BookStoreTestBase.cs
+++ b/samples/BookStore-Angular-MongoDb/aspnet-core/test/Acme.BookStore.TestBase/BookStoreTestBase.cs
@@ -4,6 +4,7 @@ using Microsoft.Extensions.DependencyInjection;
 using Volo.Abp;
 using Volo.Abp.Modularity;
 using Volo.Abp.Uow;
+using Volo.Abp.Testing;
 
 namespace Acme.BookStore
 {
diff --git a/samples/BookStore-Modular/application/test/Acme.BookStore.TestBase/BookStoreTestBase.cs b/samples/BookStore-Modular/application/test/Acme.BookStore.TestBase/BookStoreTestBase.cs
index 225ab01776..0f44532e7a 100644
--- a/samples/BookStore-Modular/application/test/Acme.BookStore.TestBase/BookStoreTestBase.cs
+++ b/samples/BookStore-Modular/application/test/Acme.BookStore.TestBase/BookStoreTestBase.cs
@@ -4,6 +4,7 @@ using Microsoft.Extensions.DependencyInjection;
 using Volo.Abp;
 using Volo.Abp.Modularity;
 using Volo.Abp.Uow;
+using Volo.Abp.Testing;
 
 namespace Acme.BookStore
 {
diff --git a/samples/BookStore-Modular/modules/book-management/test/Acme.BookStore.BookManagement.TestBase/BookManagementTestBase.cs b/samples/BookStore-Modular/modules/book-management/test/Acme.BookStore.BookManagement.TestBase/BookManagementTestBase.cs
index d4a4de4ea9..dea660609e 100644
--- a/samples/BookStore-Modular/modules/book-management/test/Acme.BookStore.BookManagement.TestBase/BookManagementTestBase.cs
+++ b/samples/BookStore-Modular/modules/book-management/test/Acme.BookStore.BookManagement.TestBase/BookManagementTestBase.cs
@@ -4,6 +4,7 @@ using Microsoft.Extensions.DependencyInjection;
 using Volo.Abp;
 using Volo.Abp.Modularity;
 using Volo.Abp.Uow;
+using Volo.Abp.Testing;
 
 namespace Acme.BookStore.BookManagement
 {
diff --git a/samples/BookStore/test/Acme.BookStore.TestBase/BookStoreTestBase.cs b/samples/BookStore/test/Acme.BookStore.TestBase/BookStoreTestBase.cs
index 225ab01776..0f44532e7a 100644
--- a/samples/BookStore/test/Acme.BookStore.TestBase/BookStoreTestBase.cs
+++ b/samples/BookStore/test/Acme.BookStore.TestBase/BookStoreTestBase.cs
@@ -4,6 +4,7 @@ using Microsoft.Extensions.DependencyInjection;
 using Volo.Abp;
 using Volo.Abp.Modularity;
 using Volo.Abp.Uow;
+using Volo.Abp.Testing;
 
 namespace Acme.BookStore
 {
diff --git a/samples/DashboardDemo/test/DashboardDemo.TestBase/DashboardDemoTestBase.cs b/samples/DashboardDemo/test/DashboardDemo.TestBase/DashboardDemoTestBase.cs
index 6cb687f0b9..937a515d14 100644
--- a/samples/DashboardDemo/test/DashboardDemo.TestBase/DashboardDemoTestBase.cs
+++ b/samples/DashboardDemo/test/DashboardDemo.TestBase/DashboardDemoTestBase.cs
@@ -4,6 +4,7 @@ using Microsoft.Extensions.DependencyInjection;
 using Volo.Abp;
 using Volo.Abp.Modularity;
 using Volo.Abp.Uow;
+using Volo.Abp.Testing;
 
 namespace DashboardDemo
 {
diff --git a/samples/MicroserviceDemo/modules/product/test/ProductManagement.TestBase/ProductManagement/ProductManagementTestBase.cs b/samples/MicroserviceDemo/modules/product/test/ProductManagement.TestBase/ProductManagement/ProductManagementTestBase.cs
index a36766b724..63269b0cf8 100644
--- a/samples/MicroserviceDemo/modules/product/test/ProductManagement.TestBase/ProductManagement/ProductManagementTestBase.cs
+++ b/samples/MicroserviceDemo/modules/product/test/ProductManagement.TestBase/ProductManagement/ProductManagementTestBase.cs
@@ -1,5 +1,6 @@
 using Volo.Abp;
 using Volo.Abp.Modularity;
+using Volo.Abp.Testing;
 
 namespace ProductManagement
 {
diff --git a/templates/app/aspnet-core/test/MyCompanyName.MyProjectName.TestBase/MyProjectNameTestBase.cs b/templates/app/aspnet-core/test/MyCompanyName.MyProjectName.TestBase/MyProjectNameTestBase.cs
index 3951905c8d..34bb6c01c2 100644
--- a/templates/app/aspnet-core/test/MyCompanyName.MyProjectName.TestBase/MyProjectNameTestBase.cs
+++ b/templates/app/aspnet-core/test/MyCompanyName.MyProjectName.TestBase/MyProjectNameTestBase.cs
@@ -4,6 +4,7 @@ using Microsoft.Extensions.DependencyInjection;
 using Volo.Abp;
 using Volo.Abp.Modularity;
 using Volo.Abp.Uow;
+using Volo.Abp.Testing;
 
 namespace MyCompanyName.MyProjectName
 {
diff --git a/templates/module/aspnet-core/test/MyCompanyName.MyProjectName.TestBase/MyProjectNameTestBase.cs b/templates/module/aspnet-core/test/MyCompanyName.MyProjectName.TestBase/MyProjectNameTestBase.cs
index 7bcdcfe9c5..fcf6e3ffc6 100644
--- a/templates/module/aspnet-core/test/MyCompanyName.MyProjectName.TestBase/MyProjectNameTestBase.cs
+++ b/templates/module/aspnet-core/test/MyCompanyName.MyProjectName.TestBase/MyProjectNameTestBase.cs
@@ -4,6 +4,7 @@ using Microsoft.Extensions.DependencyInjection;
 using Volo.Abp;
 using Volo.Abp.Modularity;
 using Volo.Abp.Uow;
+using Volo.Abp.Testing;
 
 namespace MyCompanyName.MyProjectName
 {