Testing scenario Some features of this issue are not used by core plugins yet. To test it you need to use the alpha version of mod_subsection: Install the mod_subsection. From your Moodle root folder run: git clone -b MDL-81648 https://github.com/aanabit/mod_subsection mod/subsection Login as admin and install the plugin In the terminal, init behat and run selenium. Execute all behats using the option --tags=@mod_subsection /usr/bin/php admin/tool/behat/cli/run.php --tags=@mod_subsection Confirm  all tests pass. Run Unit Tests /usr/bin/php admin/tool/phpunit/cli/util.php --run mod/subsection/tests/courseformat/sectiondelegatemodule_test.php Confirm  all tests pass.   MANUAL TESTING IS NOT REQUIRED (because the patch is covered by automated tests). However, these are the steps for manually checking how it works: Setup Download the attached MDL-81648-scenario.feature . Run the following command to create a course with a few subsection activities: php admin/tool/generator/cli/runtestscenario.php --feature= "absolute/path/to/file.feature" It might fail while trying to create the users if s1 and s2 already exist in your local instance. If that's the case, this error can be ignored. Test Login as admin Go to the Subsection activity page Confirm that the "Section" is displayed in the breadcrumb Click on any activity in the Subsection Confirm that the "Section" and "Subsection" is displayed in the breadcrumb Change the theme to "Classic" Go to the course page Confirm that the "Navigation" block displays the "Section > Subsection > Activities" hierarchy correctly