Fix namespaces

src/Middleware/WebSockets/test/UnitTests/WebSocketMiddlewareTests.cs

@@ -8,6 +8,7 @@
 using System.Text;
 using System.Threading;
 using System.Threading.Tasks;
+using Microsoft.AspNetCore.Testing;
 using Microsoft.AspNetCore.Testing.xunit;
 using Microsoft.AspNetCore.WebSockets.Internal;
 using Microsoft.Extensions.Logging.Testing;

src/Mvc/test/Mvc.FunctionalTests/TempDataInCookiesUsingCookieConsentTest.cs

@@ -8,6 +8,7 @@
 using System.Net.Http;
 using System.Threading.Tasks;
 using Microsoft.AspNetCore.Hosting;
+using Microsoft.AspNetCore.Testing;
 using Microsoft.AspNetCore.Testing.xunit;
 using Microsoft.Net.Http.Headers;
 using Xunit;

src/SignalR/common/Http.Connections/test/HttpConnectionDispatcherTests.cs

@@ -23,6 +23,7 @@
 using Microsoft.AspNetCore.Http.Features;
 using Microsoft.AspNetCore.Http.Internal;
 using Microsoft.AspNetCore.SignalR.Tests;
+using Microsoft.AspNetCore.Testing;
 using Microsoft.AspNetCore.Testing.xunit;
 using Microsoft.Extensions.DependencyInjection;
 using Microsoft.Extensions.Logging;

src/SignalR/server/SignalR/test/EndToEndTests.cs

@@ -14,6 +14,7 @@
 using Microsoft.AspNetCore.Http.Connections.Client;
 using Microsoft.AspNetCore.Http.Connections.Client.Internal;
 using Microsoft.AspNetCore.SignalR.Client;
+using Microsoft.AspNetCore.Testing;
 using Microsoft.AspNetCore.Testing.xunit;
 using Microsoft.AspNetCore.WebUtilities;
 using Microsoft.Extensions.Logging;

src/Tools/dotnet-watch/test/DotNetWatcherTests.cs

@@ -2,13 +2,13 @@
 // Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
 
 using System;
-using System.Collections.Generic;
 using System.IO;
 using System.Globalization;
 using System.Threading.Tasks;
 using Microsoft.AspNetCore.Testing.xunit;
 using Xunit;
 using Xunit.Abstractions;
+using Microsoft.AspNetCore.Testing;
 
 namespace Microsoft.DotNet.Watcher.Tools.FunctionalTests
 {