diff --git a/src/ProjectTemplates/test/Templates.Blazor.Tests/WebWorkerTemplateE2ETest.cs b/src/ProjectTemplates/test/Templates.Blazor.Tests/WebWorkerTemplateE2ETest.cs
index bd0f5e0c2d42..bfd81ad807fd 100644
--- a/src/ProjectTemplates/test/Templates.Blazor.Tests/WebWorkerTemplateE2ETest.cs
+++ b/src/ProjectTemplates/test/Templates.Blazor.Tests/WebWorkerTemplateE2ETest.cs
@@ -42,6 +42,7 @@ protected override async Task InitializeCoreAsync(TestContext context)
 
     [Theory]
     [InlineData(BrowserKind.Chromium)]
+    [QuarantinedTest("https://github.com/dotnet/aspnetcore/issues/66138")]
     public async Task WebWorkerTemplate_CanInvokeMethods(BrowserKind browserKind)
     {
         await using var testRun = await SetupWorkerLibAndBuild(_sharedHostProject);
@@ -57,6 +58,7 @@ public async Task WebWorkerTemplate_CanInvokeMethods(BrowserKind browserKind)
 
     [Theory]
     [InlineData(BrowserKind.Chromium)]
+    [QuarantinedTest("https://github.com/dotnet/aspnetcore/issues/66138")]
     public async Task WebWorkerTemplate_HandlesErrors(BrowserKind browserKind)
     {
         await using var testRun = await SetupWorkerLibAndBuild(_sharedHostProject);
@@ -72,6 +74,7 @@ public async Task WebWorkerTemplate_HandlesErrors(BrowserKind browserKind)
 
     [Theory]
     [InlineData(BrowserKind.Chromium)]
+    [QuarantinedTest("https://github.com/dotnet/aspnetcore/issues/66138")]
     public async Task WebWorkerTemplate_CanDisposeWorker(BrowserKind browserKind)
     {
         await using var testRun = await SetupWorkerLibAndBuild(_sharedHostProject);