diff --git a/test/ServerComparison.FunctionalTests/NtlmAuthentationTest.cs b/test/ServerComparison.FunctionalTests/NtlmAuthentationTest.cs
index 21a4a89806..9c4d8510df 100644
--- a/test/ServerComparison.FunctionalTests/NtlmAuthentationTest.cs
+++ b/test/ServerComparison.FunctionalTests/NtlmAuthentationTest.cs
@@ -59,15 +59,18 @@ namespace ServerComparison.FunctionalTests
                     {
                         Assert.Equal("Hello World", responseText);
 
-                        responseText = await httpClient.GetStringAsync("/Anonymous");
+                        response = await httpClient.GetAsync("/Anonymous");
+                        responseText = await response.Content.ReadAsStringAsync();
                         Assert.Equal("Anonymous?True", responseText);
 
                         response = await httpClient.GetAsync("/Restricted");
+                        responseText = await response.Content.ReadAsStringAsync();
                         Assert.Equal(HttpStatusCode.Unauthorized, response.StatusCode);
                         Assert.Contains("NTLM", response.Headers.WwwAuthenticate.ToString());
                         Assert.Contains("Negotiate", response.Headers.WwwAuthenticate.ToString());
 
                         response = await httpClient.GetAsync("/RestrictedNTLM");
+                        responseText = await response.Content.ReadAsStringAsync();
                         Assert.Equal(HttpStatusCode.Unauthorized, response.StatusCode);
                         Assert.Contains("NTLM", response.Headers.WwwAuthenticate.ToString());
                         // Note IIS can't restrict a challenge to a specific auth type, the native auth modules always add themselves.
@@ -88,22 +91,30 @@ namespace ServerComparison.FunctionalTests
                         httpClient = new HttpClient(httpClientHandler) { BaseAddress = new Uri(deploymentResult.ApplicationBaseUri) };
 
                         response = await httpClient.GetAsync("/AutoForbid");
+                        responseText = await response.Content.ReadAsStringAsync();
                         Assert.Equal(HttpStatusCode.Forbidden, response.StatusCode);
 
-                        responseText = await httpClient.GetStringAsync("/Restricted");
+                        response = await httpClient.GetAsync("/Restricted");
+                        responseText = await response.Content.ReadAsStringAsync();
+                        Assert.Equal(HttpStatusCode.OK, response.StatusCode);
                         Assert.Equal("Negotiate", responseText);
 
-                        responseText = await httpClient.GetStringAsync("/RestrictedNegotiate");
+                        response = await httpClient.GetAsync("/RestrictedNegotiate");
+                        responseText = await response.Content.ReadAsStringAsync();
+                        Assert.Equal(HttpStatusCode.OK, response.StatusCode);
                         Assert.Equal("Negotiate", responseText);
 
                         if (serverType == ServerType.WebListener)
                         {
-                            responseText = await httpClient.GetStringAsync("/RestrictedNTLM");
+                            response = await httpClient.GetAsync("/RestrictedNTLM");
+                            responseText = await response.Content.ReadAsStringAsync();
+                            Assert.Equal(HttpStatusCode.OK, response.StatusCode);
                             Assert.Equal("NTLM", responseText);
                         }
                         else if (serverType == ServerType.IISExpress)
                         {
                             response = await httpClient.GetAsync("/RestrictedNTLM");
+                            responseText = await response.Content.ReadAsStringAsync();
                             // This isn't a Forbidden because we authenticate with Negotiate and challenge for NTLM.
                             Assert.Equal(HttpStatusCode.Unauthorized, response.StatusCode);
                             // Note IIS can't restrict a challenge to a specific auth type, the native auth modules always add themselves,
diff --git a/test/ServerComparison.FunctionalTests/ResponseTests.cs b/test/ServerComparison.FunctionalTests/ResponseTests.cs
index 37638a2860..6791ddca0e 100644
--- a/test/ServerComparison.FunctionalTests/ResponseTests.cs
+++ b/test/ServerComparison.FunctionalTests/ResponseTests.cs
@@ -39,7 +39,7 @@ namespace ServerComparison.FunctionalTests
         [ConditionalTheory]
         [OSSkipCondition(OperatingSystems.Linux)]
         [OSSkipCondition(OperatingSystems.MacOSX)]
-        // [InlineData(ServerType.IISExpress, RuntimeFlavor.CoreClr, RuntimeArchitecture.x86, "http://localhost:5075/")]
+        // [InlineData(ServerType.IISExpress, RuntimeFlavor.CoreClr, RuntimeArchitecture.x86, "http://localhost:5075/")] // https://github.com/aspnet/IISIntegration/issues/7
         [InlineData(ServerType.WebListener, RuntimeFlavor.Clr, RuntimeArchitecture.x86, "http://localhost:5076/")]
         public Task ResponseFormats_Windows_ConnectionClose(ServerType serverType, RuntimeFlavor runtimeFlavor, RuntimeArchitecture architecture, string applicationBaseUrl)
         {
@@ -56,7 +56,7 @@ namespace ServerComparison.FunctionalTests
         [ConditionalTheory]
         [OSSkipCondition(OperatingSystems.Linux)]
         [OSSkipCondition(OperatingSystems.MacOSX)]
-        // [InlineData(ServerType.IISExpress, RuntimeFlavor.Clr, RuntimeArchitecture.x64, "http://localhost:5078/")]
+        // [InlineData(ServerType.IISExpress, RuntimeFlavor.Clr, RuntimeArchitecture.x64, "http://localhost:5078/")] // https://github.com/aspnet/IISIntegration/issues/7
         [InlineData(ServerType.WebListener, RuntimeFlavor.Clr, RuntimeArchitecture.x86, "http://localhost:5079/")]
         public Task ResponseFormats_Windows_Chunked(ServerType serverType, RuntimeFlavor runtimeFlavor, RuntimeArchitecture architecture, string applicationBaseUrl)
         {
@@ -73,7 +73,7 @@ namespace ServerComparison.FunctionalTests
         [ConditionalTheory]
         [OSSkipCondition(OperatingSystems.Linux)]
         [OSSkipCondition(OperatingSystems.MacOSX)]
-        // [InlineData(ServerType.IISExpress, RuntimeFlavor.Clr, RuntimeArchitecture.x64, "http://localhost:5081/")]
+        // [InlineData(ServerType.IISExpress, RuntimeFlavor.Clr, RuntimeArchitecture.x64, "http://localhost:5081/")] // https://github.com/aspnet/IISIntegration/issues/7
         [InlineData(ServerType.WebListener, RuntimeFlavor.Clr, RuntimeArchitecture.x86, "http://localhost:5082/")]
         public Task ResponseFormats_Windows_ManuallyChunk(ServerType serverType, RuntimeFlavor runtimeFlavor, RuntimeArchitecture architecture, string applicationBaseUrl)
         {
@@ -90,7 +90,7 @@ namespace ServerComparison.FunctionalTests
         [ConditionalTheory]
         [OSSkipCondition(OperatingSystems.Linux)]
         [OSSkipCondition(OperatingSystems.MacOSX)]
-        // [InlineData(ServerType.IISExpress, RuntimeFlavor.Clr, RuntimeArchitecture.x64, "http://localhost:5084/")]
+        // [InlineData(ServerType.IISExpress, RuntimeFlavor.Clr, RuntimeArchitecture.x64, "http://localhost:5084/")] // https://github.com/aspnet/IISIntegration/issues/7
         [InlineData(ServerType.WebListener, RuntimeFlavor.Clr, RuntimeArchitecture.x86, "http://localhost:5085/")]
         public Task ResponseFormats_Windows_ManuallyChunkAndClose(ServerType serverType, RuntimeFlavor runtimeFlavor, RuntimeArchitecture architecture, string applicationBaseUrl)
         {
diff --git a/test/ServerComparison.TestSites/StartupNtlmAuthentication.cs b/test/ServerComparison.TestSites/StartupNtlmAuthentication.cs
index 2211c55ed6..d14cbb774c 100644
--- a/test/ServerComparison.TestSites/StartupNtlmAuthentication.cs
+++ b/test/ServerComparison.TestSites/StartupNtlmAuthentication.cs
@@ -1,6 +1,7 @@
 // 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;
 using Microsoft.AspNet.Builder;
 using Microsoft.AspNet.Http;
 using Microsoft.AspNet.Http.Features;
@@ -28,6 +29,24 @@ namespace ServerComparison.TestSites
         {
             loggerFactory.AddConsole(minLevel: LogLevel.Warning);
 
+            app.Use(async (context, next) =>
+            {
+                try
+                {
+                    await next();
+                }
+                catch (Exception ex)
+                {
+                    if (context.Response.HasStarted)
+                    {
+                        throw;
+                    }
+                    context.Response.Clear();
+                    context.Response.StatusCode = 500;
+                    await context.Response.WriteAsync(ex.ToString());
+                }
+            });
+
             // Set up NTLM authentication for WebListener like below.
             // For IIS and IISExpress: Use inetmgr to setup NTLM authentication on the application vDir or modify the applicationHost.config to enable NTLM.
             var listener = app.ServerFeatures.Get<WebListener>();
@@ -36,6 +55,10 @@ namespace ServerComparison.TestSites
                 listener.AuthenticationManager.AuthenticationSchemes =
                     AuthenticationSchemes.Negotiate | AuthenticationSchemes.NTLM | AuthenticationSchemes.AllowAnonymous;
             }
+            else
+            {
+                app.UseIISPlatformHandler();
+            }
 
             app.Use((context, next) => 
             {
@@ -58,7 +81,7 @@ namespace ServerComparison.TestSites
 
                 if (context.Request.Path.Equals("/Forbidden"))
                 {
-                    return context.Authentication.ForbidAsync(string.Empty);
+                    return context.Authentication.ForbidAsync(Microsoft.AspNet.Http.Authentication.AuthenticationManager.AutomaticScheme);
                 }
 
                 if (context.Request.Path.Equals("/AutoForbid"))