diff --git a/test/py.twisted/test_suite.py b/test/py.twisted/test_suite.py
index 6e1fee2..26c1ee2 100644
--- a/test/py.twisted/test_suite.py
+++ b/test/py.twisted/test_suite.py
@@ -59,6 +59,9 @@
     def testDouble(self, dub):
         return dub
 
+    def testBinary(self, thing):
+        return thing
+
     def testStruct(self, thing):
         return thing
 
@@ -144,6 +147,8 @@
     def testDouble(self):
         self.assertEquals((yield self.client.testDouble(-5.235098235)), -5.235098235)
 
+    # TODO: def testBinary(self) ...		
+		
     @defer.inlineCallbacks
     def testStruct(self):
         x = Xtruct()