diff --git a/src/Servers/Kestrel/test/Interop.FunctionalTests/Http3/Http3TlsTests.cs b/src/Servers/Kestrel/test/Interop.FunctionalTests/Http3/Http3TlsTests.cs
index ec6c7f250e82b9c51bcf2096bf90243c07f551c9..9bfc01153b5138f7668d1faae45be7afb89219f6 100644
--- a/src/Servers/Kestrel/test/Interop.FunctionalTests/Http3/Http3TlsTests.cs
+++ b/src/Servers/Kestrel/test/Interop.FunctionalTests/Http3/Http3TlsTests.cs
@@ -251,6 +251,7 @@ public class Http3TlsTests : LoggedTest
     [MsQuicSupported]
     [InlineData(HttpProtocols.Http3)]
     [InlineData(HttpProtocols.Http1AndHttp2AndHttp3)]
+    [QuarantinedTest("https://github.com/dotnet/aspnetcore/issues/43548")]
     public async Task OnAuthenticate_Available_Throws(HttpProtocols protocols)
     {
         await ServerRetryHelper.BindPortsWithRetry(async port =>