diff --git a/src/libraries/System.Net.Http/tests/FunctionalTests/HttpClientHandlerTest.Http3.cs b/src/libraries/System.Net.Http/tests/FunctionalTests/HttpClientHandlerTest.Http3.cs
index b399e5674267c9..87e98fb7d4681b 100644
--- a/src/libraries/System.Net.Http/tests/FunctionalTests/HttpClientHandlerTest.Http3.cs
+++ b/src/libraries/System.Net.Http/tests/FunctionalTests/HttpClientHandlerTest.Http3.cs
@@ -1349,7 +1349,9 @@ public static TheoryData<string> InteropUrisWithContent() =>
             new TheoryData<string>
             {
                 { "https://cloudflare-quic.com/" }, // Cloudflare with content
-                { "https://pgjones.dev/" }, // aioquic with content
+                // This endpoint is consistently failing.
+                // [ActiveIssue("https://github.com/dotnet/runtime/issues/63009")]
+                //{ "https://pgjones.dev/" }, // aioquic with content
             };
     }