Traceback (most recent call last):
  File "/tmp/adt-run.DCUz2f/build.fJr/real-tree/ubuntu_sanity_tests/tests/test_add_contact.py", line 65, in test_add_contact_with_name_and_number
    contact_editor = application.main_window.go_to_add_contact()
  File "/tmp/adt-run.DCUz2f/deps/usr/lib/python3/dist-packages/autopilot/introspection/dbus.py", line 416, in __getattr__
    (self.__class__.__name__, name))
AttributeError: Class 'AddressBookApp' has no attribute 'main_window'.