diff --git a/src/test/run-pass/sio-ctx.rs b/src/test/run-pass/sio-ctx.rs
index c484961cf06b..dd77bb9deddc 100644
--- a/src/test/run-pass/sio-ctx.rs
+++ b/src/test/run-pass/sio-ctx.rs
@@ -1,4 +1,4 @@
-// Fails periodically, probably with RUST_THREADS > 1
+// Seems to hang for long periods, probably with RUST_THREADS > 1. Issue #810
 // xfail-stage1
 // xfail-stage2
 // xfail-stage3