diff --git a/samples/BookStore-Angular-MongoDb/aspnet-core/test/Acme.BookStore.MongoDB.Tests/MongoDb/BookStoreMongoDbTestModule.cs b/samples/BookStore-Angular-MongoDb/aspnet-core/test/Acme.BookStore.MongoDB.Tests/MongoDb/BookStoreMongoDbTestModule.cs
index c59bf2452c..d45f3ea02f 100644
--- a/samples/BookStore-Angular-MongoDb/aspnet-core/test/Acme.BookStore.MongoDB.Tests/MongoDb/BookStoreMongoDbTestModule.cs
+++ b/samples/BookStore-Angular-MongoDb/aspnet-core/test/Acme.BookStore.MongoDB.Tests/MongoDb/BookStoreMongoDbTestModule.cs
@@ -1,6 +1,5 @@
 using System;
 using Mongo2Go;
-using Volo.Abp;
 using Volo.Abp.Data;
 using Volo.Abp.Modularity;
 
@@ -12,21 +11,18 @@ namespace Acme.BookStore.MongoDB
         )]
     public class BookStoreMongoDbTestModule : AbpModule
     {
-        private MongoDbRunner _mongoDbRunner;
+        private static readonly MongoDbRunner MongoDbRunner = MongoDbRunner.Start();
 
         public override void ConfigureServices(ServiceConfigurationContext context)
         {
-            _mongoDbRunner = MongoDbRunner.Start();
+            var connectionString = MongoDbRunner.ConnectionString.EnsureEndsWith('/') +
+                                   "BookStore_" +
+                                   Guid.NewGuid().ToString("N");
 
             Configure<DbConnectionOptions>(options =>
             {
-                options.ConnectionStrings.Default = _mongoDbRunner.ConnectionString.EnsureEndsWith('/') + "BookStore";
+                options.ConnectionStrings.Default = connectionString;
             });
         }
-
-        public override void OnApplicationShutdown(ApplicationShutdownContext context)
-        {
-            _mongoDbRunner.Dispose();
-        }
     }
 }
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