You may have noticed when running the test that there is a delay when we check this after signing in. That is because it is inefficient to check for something not to be visible using this method. There is code in the page object, `is_element_not_visible` which is designed to not cause an implicit wait to happen when we expect something to not be visible. You should rework the code (perhaps in the page object and/or in the test) to make use of this so that when we are checking that an element is not visible we don't incur the delay.