diff --git a/pyproject.toml b/pyproject.toml
index 10ddd5994..b8d9067f9 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -274,7 +274,7 @@ markers = [
 ]
 filterwarnings = [
     "ignore::DeprecationWarning:twisted.web.static",
-    # Twisted doesn't close failed sockets after CannotListenError
+    # Twisted doesn't close failed sockets after CannotListenError: https://github.com/twisted/twisted/issues/6108
     "ignore:Exception ignored in. <socket\\.socket.*laddr=..0\\.0\\.0\\.0., 0.:pytest.PytestUnraisableExceptionWarning",
 ]