diff --git a/.vscode/extensions.json b/.vscode/extensions.json
index a869097c1c..dc07887436 100644
--- a/.vscode/extensions.json
+++ b/.vscode/extensions.json
@@ -1,6 +1,6 @@
 {
   "recommendations": [
-    "ms-vscode.csharp",
+    "ms-dotnettools.csharp",
     "ms-vscode.PowerShell",
     "EditorConfig.EditorConfig"
   ]
diff --git a/src/Components/WebAssembly/Build/test/BuildIntegrationTests/BuildIntegrationTest.cs b/src/Components/WebAssembly/Build/test/BuildIntegrationTests/BuildIntegrationTest.cs
index c18f888583..c9184b649d 100644
--- a/src/Components/WebAssembly/Build/test/BuildIntegrationTests/BuildIntegrationTest.cs
+++ b/src/Components/WebAssembly/Build/test/BuildIntegrationTests/BuildIntegrationTest.cs
@@ -4,6 +4,7 @@
 using System.IO;
 using System.Text.Json;
 using System.Threading.Tasks;
+using Microsoft.AspNetCore.Testing;
 using Xunit;
 using static Microsoft.AspNetCore.Components.WebAssembly.Build.WebAssemblyRuntimePackage;
 
@@ -203,6 +204,7 @@ namespace Microsoft.AspNetCore.Components.WebAssembly.Build
         }
 
         [Fact]
+        [QuarantinedTest]
         public async Task Build_SatelliteAssembliesAreCopiedToBuildOutput()
         {
             // Arrange
diff --git a/src/Components/WebAssembly/Build/test/BuildIntegrationTests/PublishIntegrationTest.cs b/src/Components/WebAssembly/Build/test/BuildIntegrationTests/PublishIntegrationTest.cs
index 3d1cf2f568..b4b34470ea 100644
--- a/src/Components/WebAssembly/Build/test/BuildIntegrationTests/PublishIntegrationTest.cs
+++ b/src/Components/WebAssembly/Build/test/BuildIntegrationTests/PublishIntegrationTest.cs
@@ -8,6 +8,7 @@ using System.Linq;
 using System.Text.Json;
 using System.Threading.Tasks;
 using Microsoft.AspNetCore.Blazor.Build;
+using Microsoft.AspNetCore.Testing;
 using Xunit;
 using ResourceHashesByNameDictionary = System.Collections.Generic.Dictionary<string, string>;
 using static Microsoft.AspNetCore.Components.WebAssembly.Build.WebAssemblyRuntimePackage;
@@ -284,6 +285,7 @@ namespace Microsoft.AspNetCore.Components.WebAssembly.Build
         }
 
         [Fact]
+        [QuarantinedTest]
         public async Task Publish_HostedApp_WithLinkOnBuildTrue_Works()
         {
             // Arrange
diff --git a/src/Razor/Microsoft.NET.Sdk.Razor/test/IntegrationTests/BuildIntegrationTestLegacy.cs b/src/Razor/Microsoft.NET.Sdk.Razor/test/IntegrationTests/BuildIntegrationTestLegacy.cs
index f72de92966..222ad70710 100644
--- a/src/Razor/Microsoft.NET.Sdk.Razor/test/IntegrationTests/BuildIntegrationTestLegacy.cs
+++ b/src/Razor/Microsoft.NET.Sdk.Razor/test/IntegrationTests/BuildIntegrationTestLegacy.cs
@@ -4,6 +4,7 @@
 using System;
 using System.IO;
 using System.Threading.Tasks;
+using Microsoft.AspNetCore.Testing;
 using Xunit;
 
 namespace Microsoft.AspNetCore.Razor.Design.IntegrationTests
@@ -30,6 +31,7 @@ namespace Microsoft.AspNetCore.Razor.Design.IntegrationTests
         }
 
         [Fact]
+        [QuarantinedTest]
         public virtual async Task Building_Project()
         {
             using (CreateTestProject())