diff --git a/IPython/extensions/tests/test_autoreload.py b/IPython/extensions/tests/test_autoreload.py
index 541b952..a942c5e 100644
--- a/IPython/extensions/tests/test_autoreload.py
+++ b/IPython/extensions/tests/test_autoreload.py
@@ -204,7 +204,7 @@ class TestAutoreload(Fixture):
             with nt.assert_raises(AttributeError):
                 self.shell.run_code("{object_name}.cube()".format(object_name=object_name))
             with nt.assert_raises(AttributeError):
-                self.shell.run_code("{object_name}.square(5)".format(object_name=object_name))
+                self.shell.run_code("{object_name}.square()".format(object_name=object_name))
             self.shell.run_code("{object_name}.b".format(object_name=object_name))
             self.shell.run_code("{object_name}.a".format(object_name=object_name))
             with nt.assert_raises(AttributeError):