Also, in order to avoid code duplication, I would strongly advise to use class `test.aria.widgets.form.autocomplete.multiautocomplete.BaseMultiAutoCompleteTestCase` as parent class.
It provides methods like `clickAndType` and `removeByCrossClick` that can be used in this test. Also, there is no need to create a new template. An `onchange` handler can be added in template `test.aria.widgets.form.autocomplete.multiautocomplete.template.MultiAutoTpl`, which is used by all tests.