entity_browser-8.x-2.x-dev/tests/modules/entity_browser_test/entity_browser_test.routing.yml

entity_browser_test.element:
  path: '/test-element'
  defaults:
    _form: '\Drupal\entity_browser_test\Form\FormElementTest'
    _title: 'Entity browser form element test'
  requirements:
    _access: 'TRUE'