--- a/devtools/test/unittest_fill.py	Tue Apr 08 17:39:39 2014 +0200
+++ b/devtools/test/unittest_fill.py	Tue Apr 08 18:00:14 2014 +0200
@@ -39,7 +39,7 @@
 
 
     def test_autoextend(self):
-        self.assertFalse('generate_server' in dir(ValueGenerator))
+        self.assertNotIn('generate_server', dir(ValueGenerator))
         class MyValueGenerator(ValueGenerator):
             def generate_server(self, index):
                 return attrname
@@ -47,19 +47,19 @@
 
 
     def test_bad_signature_detection(self):
-        self.assertFalse('generate_server' in dir(ValueGenerator))
+        self.assertNotIn('generate_server', dir(ValueGenerator))
         try:
             class MyValueGenerator(ValueGenerator):
                 def generate_server(self):
                     pass
         except TypeError:
-            self.assertFalse('generate_server' in dir(ValueGenerator))
+            self.assertNotIn('generate_server', dir(ValueGenerator))
         else:
             self.fail('TypeError not raised')
 
 
     def test_signature_extension(self):
-        self.assertFalse('generate_server' in dir(ValueGenerator))
+        self.assertNotIn('generate_server', dir(ValueGenerator))
         class MyValueGenerator(ValueGenerator):
             def generate_server(self, index, foo):
                 pass