diff --git a/src/Hosting/Hosting/test/WebHostBuilderTests.cs b/src/Hosting/Hosting/test/WebHostBuilderTests.cs
index 5666acefeaae..b082b042467b 100644
--- a/src/Hosting/Hosting/test/WebHostBuilderTests.cs
+++ b/src/Hosting/Hosting/test/WebHostBuilderTests.cs
@@ -15,6 +15,7 @@
 using Microsoft.AspNetCore.Hosting.Tests.Fakes;
 using Microsoft.AspNetCore.Http;
 using Microsoft.AspNetCore.Http.Features;
+using Microsoft.AspNetCore.Testing;
 using Microsoft.Extensions.Configuration;
 using Microsoft.Extensions.DependencyInjection;
 using Microsoft.Extensions.Hosting;
@@ -114,6 +115,7 @@ public async Task MultipleUseStartupCallsLastWins(IWebHostBuilder builder)
 
         [Theory]
         [MemberData(nameof(DefaultWebHostBuildersWithConfig))]
+        [QuarantinedTest("https://github.com/dotnet/aspnetcore/issues/30582")]
         public async Task UseStartupFactoryWorks(IWebHostBuilder builder)
         {
             void ConfigureServices(IServiceCollection services) { }
diff --git a/src/ProjectTemplates/BlazorTemplates.Tests/BlazorWasmTemplateTest.cs b/src/ProjectTemplates/BlazorTemplates.Tests/BlazorWasmTemplateTest.cs
index d917e71ca32a..df668dbad34e 100644
--- a/src/ProjectTemplates/BlazorTemplates.Tests/BlazorWasmTemplateTest.cs
+++ b/src/ProjectTemplates/BlazorTemplates.Tests/BlazorWasmTemplateTest.cs
@@ -280,6 +280,7 @@ private void ValidatePublishedServiceWorker(Project project)
         [InlineData(BrowserKind.Chromium)]
         // LocalDB doesn't work on non Windows platforms
         [OSSkipCondition(OperatingSystems.Linux | OperatingSystems.MacOSX)]
+        [QuarantinedTest("https://github.com/dotnet/aspnetcore/issues/30700")]
         public Task BlazorWasmHostedTemplate_IndividualAuth_Works_WithLocalDB(BrowserKind browserKind)
         {
             return BlazorWasmHostedTemplate_IndividualAuth_Works(browserKind, true);