diff --git a/src/allmydata/test/test_mutable.py b/src/allmydata/test/test_mutable.py
index a9396890c..b49defe63 100644
--- a/src/allmydata/test/test_mutable.py
+++ b/src/allmydata/test/test_mutable.py
@@ -166,6 +166,8 @@ class FakeClient:
 
     def notify_retrieve(self, r):
         pass
+    def notify_publish(self, p):
+        pass
 
     def create_node_from_uri(self, u):
         u = IURI(u)