diff --git a/test/WebSites/RazorPagesWebSite/Startup.cs b/test/WebSites/RazorPagesWebSite/Startup.cs
index c917328e6d..adcb48b6d0 100644
--- a/test/WebSites/RazorPagesWebSite/Startup.cs
+++ b/test/WebSites/RazorPagesWebSite/Startup.cs
@@ -2,6 +2,7 @@
 // Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
 
 using Microsoft.AspNetCore.Builder;
+using Microsoft.AspNetCore.Authentication.Cookies;
 using Microsoft.Extensions.DependencyInjection;
 
 namespace RazorPagesWebSite
@@ -10,7 +11,7 @@ public class Startup
     {
         public void ConfigureServices(IServiceCollection services)
         {
-            services.AddAuthentication().AddCookie(options => options.LoginPath = "/Login");
+            services.AddAuthentication(CookieAuthenticationDefaults.AuthenticationScheme).AddCookie(options => options.LoginPath = "/Login");
             services.AddMvc()
                 .AddCookieTempDataProvider()
                 .AddRazorPagesOptions(options =>
diff --git a/test/WebSites/RazorPagesWebSite/StartupWithBasePath.cs b/test/WebSites/RazorPagesWebSite/StartupWithBasePath.cs
index 93a058fe81..a2e31679d3 100644
--- a/test/WebSites/RazorPagesWebSite/StartupWithBasePath.cs
+++ b/test/WebSites/RazorPagesWebSite/StartupWithBasePath.cs
@@ -2,6 +2,7 @@
 // Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
 
 using Microsoft.AspNetCore.Builder;
+using Microsoft.AspNetCore.Authentication.Cookies;
 using Microsoft.Extensions.DependencyInjection;
 
 namespace RazorPagesWebSite
@@ -10,7 +11,7 @@ public class StartupWithBasePath
     {
         public void ConfigureServices(IServiceCollection services)
         {
-            services.AddAuthentication()
+            services.AddAuthentication(CookieAuthenticationDefaults.AuthenticationScheme)
                 .AddCookie(options => options.LoginPath = "/Login");
             services.AddMvc()
                 .AddCookieTempDataProvider()
diff --git a/test/WebSites/SecurityWebSite/Startup.cs b/test/WebSites/SecurityWebSite/Startup.cs
index 0ba466b343..9f427a1cf9 100644
--- a/test/WebSites/SecurityWebSite/Startup.cs
+++ b/test/WebSites/SecurityWebSite/Startup.cs
@@ -2,6 +2,7 @@
 // Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
 
 using Microsoft.AspNetCore.Builder;
+using Microsoft.AspNetCore.Authentication.Cookies;
 using Microsoft.Extensions.DependencyInjection;
 
 namespace SecurityWebSite
@@ -14,7 +15,7 @@ public void ConfigureServices(IServiceCollection services)
             // Add framework services.
             services.AddMvc();
             services.AddAntiforgery();
-            services.AddAuthentication().AddCookie(options => 
+            services.AddAuthentication(CookieAuthenticationDefaults.AuthenticationScheme).AddCookie(options => 
             {
                 options.LoginPath = "/Home/Login";
                 options.LogoutPath = "/Home/Logout";