diff --git a/src/DotXxlJob.Core/Extensions/ServiceCollectionExtensions.cs b/src/DotXxlJob.Core/Extensions/ServiceCollectionExtensions.cs
index 21520e4..cc727fd 100644
--- a/src/DotXxlJob.Core/Extensions/ServiceCollectionExtensions.cs
+++ b/src/DotXxlJob.Core/Extensions/ServiceCollectionExtensions.cs
@@ -50,7 +50,6 @@ namespace DotXxlJob.Core
             services.AddSingleton<CallbackTaskQueue>();
             services.AddSingleton<AdminClient>();
             services.AddSingleton<ITaskExecutor, TaskExecutors.BeanTaskExecutor>();
-            services.AddSingleton(new JobHandlerCache());
 
             return services;
         }
diff --git a/tests/DotXxlJob.Core.Tests/BeanTaskExecutorTest.cs b/tests/DotXxlJob.Core.Tests/BeanTaskExecutorTest.cs
index 8fc15df..0eeaeec 100644
--- a/tests/DotXxlJob.Core.Tests/BeanTaskExecutorTest.cs
+++ b/tests/DotXxlJob.Core.Tests/BeanTaskExecutorTest.cs
@@ -6,7 +6,7 @@ using Xunit;
 
 namespace DotXxlJob.Core.Tests
 {
-  public class BeanTaskExecutorTest
+    public class BeanTaskExecutorTest
     {
         [Fact]
         public async Task Repeated_Job_Handler()
diff --git a/tests/DotXxlJob.Core.Tests/DefaultJobHandlerFactory.cs b/tests/DotXxlJob.Core.Tests/DefaultJobHandlerFactory.cs
index c342e0f..6afb6e8 100644
--- a/tests/DotXxlJob.Core.Tests/DefaultJobHandlerFactory.cs
+++ b/tests/DotXxlJob.Core.Tests/DefaultJobHandlerFactory.cs
@@ -1,5 +1,4 @@
 using System;
-using System.Collections.Generic;
 using System.Threading.Tasks;
 using DotXxlJob.Core.Model;
 using Microsoft.Extensions.DependencyInjection;
@@ -7,7 +6,7 @@ using Xunit;
 
 namespace DotXxlJob.Core.Tests
 {
-    public class DefaultJobHandlerFactory
+  public class DefaultJobHandlerFactory
     {
         [Fact]
         public async Task Repeated_Job_Handler()