diff --git a/src/allmydata/node.py b/src/allmydata/node.py
index dcbc5088c..f2f52d323 100644
--- a/src/allmydata/node.py
+++ b/src/allmydata/node.py
@@ -208,7 +208,6 @@ def config_from_string(basedir, portnumfile, config_str):
         """
         We throw away any attempt to persist
         """
-        pass
     return _Config(parser, portnumfile, basedir, '<in-memory>', write_new_config)