diff --git a/src/Components/test/E2ETest/ServerRenderingTests/BlazorWebJsInitializersTest.cs b/src/Components/test/E2ETest/ServerRenderingTests/BlazorWebJsInitializersTest.cs
index b6e0386d2739..7ac54a2b0797 100644
--- a/src/Components/test/E2ETest/ServerRenderingTests/BlazorWebJsInitializersTest.cs
+++ b/src/Components/test/E2ETest/ServerRenderingTests/BlazorWebJsInitializersTest.cs
@@ -5,6 +5,7 @@
 using Microsoft.AspNetCore.Components.E2ETest.Infrastructure;
 using Microsoft.AspNetCore.Components.E2ETest.Infrastructure.ServerFixtures;
 using Microsoft.AspNetCore.E2ETesting;
+using Microsoft.AspNetCore.InternalTesting;
 using OpenQA.Selenium;
 using TestServer;
 using Xunit.Abstractions;
@@ -28,6 +29,7 @@ public override Task InitializeAsync()
 
     [Theory]
     [MemberData(nameof(InitializerTestData))]
+    [QuarantinedTest("https://github.com/dotnet/aspnetcore/issues/66140")]
     public void InitializersRunsModernCallbacksByDefaultWhenPresent(bool streaming, bool webassembly, bool server, string[] expectedInvokedCallbacks)
     {
         var url = $"{ServerPathBase}/initializers?streaming={streaming}&wasm={webassembly}&server={server}";