diff --git a/src/allmydata/test/no_network.py b/src/allmydata/test/no_network.py
index 1e8c519e1..ba497f81a 100644
--- a/src/allmydata/test/no_network.py
+++ b/src/allmydata/test/no_network.py
@@ -67,7 +67,7 @@ class Marker(object):
 
 fireNow = partial(defer.succeed, None)
 
-@implementer(IRemoteReference)  # type: ignore # todo: write stubs for foolscap
+@implementer(IRemoteReference)  # type: ignore  # warner/foolscap#79
 class LocalWrapper(object):
     """
     A ``LocalWrapper`` presents the remote reference interface to a local