diff --git a/src/libraries/System.Net.Http/tests/FunctionalTests/SocketsHttpHandlerTest.Cancellation.cs b/src/libraries/System.Net.Http/tests/FunctionalTests/SocketsHttpHandlerTest.Cancellation.cs
index 3f7f506aaf355..e6fb25a24171e 100644
--- a/src/libraries/System.Net.Http/tests/FunctionalTests/SocketsHttpHandlerTest.Cancellation.cs
+++ b/src/libraries/System.Net.Http/tests/FunctionalTests/SocketsHttpHandlerTest.Cancellation.cs
@@ -80,6 +80,7 @@ await LoopbackServerFactory.CreateClientAndServerAsync(async uri =>
 
         [OuterLoop]
         [Theory]
+        [ActiveIssue("https://github.com/dotnet/runtime/issues/55931")]
         [InlineData(true)]
         [InlineData(false)]
         public async Task ConnectTimeout_PlaintextStreamFilterTimesOut_Throws(bool useSsl)