diff --git a/src/libraries/System.Net.Quic/tests/FunctionalTests/MsQuicTests.cs b/src/libraries/System.Net.Quic/tests/FunctionalTests/MsQuicTests.cs
index 2876d33551a6c5..a14b21f4f08a93 100644
--- a/src/libraries/System.Net.Quic/tests/FunctionalTests/MsQuicTests.cs
+++ b/src/libraries/System.Net.Quic/tests/FunctionalTests/MsQuicTests.cs
@@ -342,6 +342,7 @@ public async Task ConnectWithCertificateForLoopbackIP_IndicatesExpectedError(str
         [ConditionalTheory]
         [InlineData(true)]
         [InlineData(false)]
+        [ActiveIssue("https://github.com/dotnet/runtime/issues/64944", TestPlatforms.Windows)]
         public async Task ConnectWithClientCertificate(bool sendCertificate)
         {
             if (PlatformDetection.IsWindows10Version20348OrLower)