diff --git a/test/WebSites/SimpleWebSite/Startup.cs b/test/WebSites/SimpleWebSite/Startup.cs
index b5d76b2d6d..2b0cb50f81 100644
--- a/test/WebSites/SimpleWebSite/Startup.cs
+++ b/test/WebSites/SimpleWebSite/Startup.cs
@@ -1,8 +1,10 @@
 // Copyright (c) .NET Foundation. All rights reserved.
 // Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
 
+using System.Text.Encodings.Web;
 using Microsoft.AspNet.Builder;
 using Microsoft.Extensions.DependencyInjection;
+using Microsoft.Extensions.WebEncoders.Testing;
 using Microsoft.Net.Http.Headers;
 using Newtonsoft.Json;
 
@@ -18,6 +20,7 @@ namespace SimpleWebSite
                 .AddAuthorization()
                 .AddFormatterMappings(m => m.SetMediaTypeMappingForFormat("js", new MediaTypeHeaderValue("application/json")))
                 .AddJsonFormatters(j => j.Formatting = Formatting.Indented);
+            services.AddSingleton<UrlEncoder, UrlTestEncoder>();
         }
 
         public void Configure(IApplicationBuilder app)