diff --git a/framework/test/Volo.Abp.AspNetCore.Mvc.UI.Bootstrap.Demo.Tests/Volo/Abp/AspNetCore/Mvc/UI/Bootstrap/Demo/AbpAspNetCoreMvcUiBootstrapDemoTestBase.cs b/framework/test/Volo.Abp.AspNetCore.Mvc.UI.Bootstrap.Demo.Tests/Volo/Abp/AspNetCore/Mvc/UI/Bootstrap/Demo/AbpAspNetCoreMvcUiBootstrapDemoTestBase.cs
index 15473df986..d7a8a88c2a 100644
--- a/framework/test/Volo.Abp.AspNetCore.Mvc.UI.Bootstrap.Demo.Tests/Volo/Abp/AspNetCore/Mvc/UI/Bootstrap/Demo/AbpAspNetCoreMvcUiBootstrapDemoTestBase.cs
+++ b/framework/test/Volo.Abp.AspNetCore.Mvc.UI.Bootstrap.Demo.Tests/Volo/Abp/AspNetCore/Mvc/UI/Bootstrap/Demo/AbpAspNetCoreMvcUiBootstrapDemoTestBase.cs
@@ -18,10 +18,7 @@ namespace Volo.Abp.AspNetCore.Mvc.UI.Bootstrap.Demo
         {
             return CalculateContentRootPath(
                 "Volo.Abp.sln",
-                string.Format(
-                    "test{0}Volo.Abp.AspNetCore.Mvc.UI.Bootstrap.Demo",
-                    Path.DirectorySeparatorChar
-                )
+                $"test{Path.DirectorySeparatorChar}Volo.Abp.AspNetCore.Mvc.UI.Bootstrap.Demo"
             );
         }