diff --git a/src/Components/test/E2ETest/ServerExecutionTests/ComponentHubReliabilityTest.cs b/src/Components/test/E2ETest/ServerExecutionTests/ComponentHubReliabilityTest.cs
index 774197872d..616cdab1e0 100644
--- a/src/Components/test/E2ETest/ServerExecutionTests/ComponentHubReliabilityTest.cs
+++ b/src/Components/test/E2ETest/ServerExecutionTests/ComponentHubReliabilityTest.cs
@@ -14,6 +14,7 @@ using Xunit.Abstractions;
 
 namespace Microsoft.AspNetCore.Components.E2ETest.ServerExecutionTests
 {
+    [QuarantinedTest("https://github.com/dotnet/aspnetcore/issues/19666")]
     public class ComponentHubReliabilityTest : IgnitorTest<ServerStartup>
     {
         public ComponentHubReliabilityTest(BasicTestAppServerSiteFixture<ServerStartup> serverFixture, ITestOutputHelper output)