diff --git a/src/Servers/Kestrel/test/Interop.FunctionalTests/Http3/Http3RequestTests.cs b/src/Servers/Kestrel/test/Interop.FunctionalTests/Http3/Http3RequestTests.cs
index b14df27b4dc7..73b7bbdbace9 100644
--- a/src/Servers/Kestrel/test/Interop.FunctionalTests/Http3/Http3RequestTests.cs
+++ b/src/Servers/Kestrel/test/Interop.FunctionalTests/Http3/Http3RequestTests.cs
@@ -2258,6 +2258,7 @@ await WaitForLogAsync(logs =>
     [MsQuicSupported]
     [InlineData(HttpProtocols.Http3)]
     [InlineData(HttpProtocols.Http2)]
+    [QuarantinedTest("https://github.com/dotnet/aspnetcore/issues/66149")]
     public async Task GET_GracefulServerShutdown_RequestCompleteSuccessfullyInsideHostTimeout(HttpProtocols protocol)
     {
         // Arrange