diff --git a/src/Components/test/E2ETest/Tests/EventBubblingTest.cs b/src/Components/test/E2ETest/Tests/EventBubblingTest.cs
index 62af1fbf36..1b63f5ab4d 100644
--- a/src/Components/test/E2ETest/Tests/EventBubblingTest.cs
+++ b/src/Components/test/E2ETest/Tests/EventBubblingTest.cs
@@ -6,6 +6,7 @@ using BasicTestApp;
 using Microsoft.AspNetCore.Components.E2ETest.Infrastructure;
 using Microsoft.AspNetCore.Components.E2ETest.Infrastructure.ServerFixtures;
 using Microsoft.AspNetCore.E2ETesting;
+using Microsoft.AspNetCore.Testing;
 using OpenQA.Selenium;
 using Xunit;
 using Xunit.Abstractions;
@@ -100,6 +101,7 @@ namespace Microsoft.AspNetCore.Components.E2ETest.Tests
         }
 
         [Theory]
+        [QuarantinedTest]
         [InlineData("target")]
         [InlineData("intermediate")]
         public void StopPropagation(string whereToStopPropagation)
diff --git a/src/Servers/IIS/IIS/test/Common.FunctionalTests/ClientCertificateTests.cs b/src/Servers/IIS/IIS/test/Common.FunctionalTests/ClientCertificateTests.cs
index e0db51c524..ca964dd96e 100644
--- a/src/Servers/IIS/IIS/test/Common.FunctionalTests/ClientCertificateTests.cs
+++ b/src/Servers/IIS/IIS/test/Common.FunctionalTests/ClientCertificateTests.cs
@@ -34,6 +34,7 @@ namespace Microsoft.AspNetCore.Server.IIS.FunctionalTests
                 .WithAllHostingModels();
 
         [ConditionalTheory]
+        [QuarantinedTest]
         [MemberData(nameof(TestVariants))]
         [MinimumOSVersion(OperatingSystems.Windows, WindowsVersions.Win8)]
         public Task HttpsNoClientCert_NoClientCert(TestVariant variant)