diff --git a/src/Hosting/TestHost/test/TestClientTests.cs b/src/Hosting/TestHost/test/TestClientTests.cs
index 13a8016ddc..5d7f3b5de8 100644
--- a/src/Hosting/TestHost/test/TestClientTests.cs
+++ b/src/Hosting/TestHost/test/TestClientTests.cs
@@ -433,6 +433,7 @@ namespace Microsoft.AspNetCore.TestHost
         }
 
         [Fact]
+        [QuarantinedTest("https://github.com/dotnet/aspnetcore/issues/20164")]
         public async Task ClientStreaming_ResponseCompletesWithoutResponseBodyWrite()
         {
             // Arrange
diff --git a/src/ProjectTemplates/test/BlazorServerTemplateTest.cs b/src/ProjectTemplates/test/BlazorServerTemplateTest.cs
index 8020102386..bd17a8fd88 100644
--- a/src/ProjectTemplates/test/BlazorServerTemplateTest.cs
+++ b/src/ProjectTemplates/test/BlazorServerTemplateTest.cs
@@ -26,6 +26,7 @@ namespace Templates.Test
 
         [ConditionalFact]
         [SkipOnHelix("selenium")]
+        [QuarantinedTest("https://github.com/dotnet/aspnetcore/issues/20172")]
         public async Task BlazorServerTemplateWorks_NoAuth()
         {
             Project = await ProjectFactory.GetOrCreateProject("blazorservernoauth", Output);
diff --git a/src/ProjectTemplates/test/EmptyWebTemplateTest.cs b/src/ProjectTemplates/test/EmptyWebTemplateTest.cs
index a448f039a4..609ff1879e 100644
--- a/src/ProjectTemplates/test/EmptyWebTemplateTest.cs
+++ b/src/ProjectTemplates/test/EmptyWebTemplateTest.cs
@@ -25,6 +25,7 @@ namespace Templates.Test
 
         [ConditionalFact]
         [SkipOnHelix("Cert failures", Queues = "OSX.1014.Amd64;OSX.1014.Amd64.Open")]
+        [QuarantinedTest("https://github.com/dotnet/aspnetcore/issues/20162")]
         public async Task EmptyWebTemplateCSharp()
         {
             await EmtpyTemplateCore(languageOverride: null);
diff --git a/src/Servers/Kestrel/test/FunctionalTests/RequestTests.cs b/src/Servers/Kestrel/test/FunctionalTests/RequestTests.cs
index 1953b86c6b..500547687a 100644
--- a/src/Servers/Kestrel/test/FunctionalTests/RequestTests.cs
+++ b/src/Servers/Kestrel/test/FunctionalTests/RequestTests.cs
@@ -500,6 +500,7 @@ namespace Microsoft.AspNetCore.Server.Kestrel.FunctionalTests
 
         [Theory]
         [MemberData(nameof(ConnectionMiddlewareData))]
+        [QuarantinedTest("https://github.com/dotnet/aspnetcore/issues/20163")]
         public async Task ConnectionClosedTokenFiresOnClientFIN(ListenOptions listenOptions)
         {
             var testContext = new TestServiceContext(LoggerFactory);