ClickHouse/tests/config/config.d/merge_tree_old_dirs_cleanup.xml

<clickhouse>
    <merge_tree>
        <!-- Default is 86400 (1 day), but we have protection from removal of tmp dirs that are currently in use -->
        <temporary_directories_lifetime>1</temporary_directories_lifetime>
        <!-- Default is 60 seconds, but let's make tests more aggressive -->
        <merge_tree_clear_old_temporary_directories_interval_seconds>5</merge_tree_clear_old_temporary_directories_interval_seconds>
    </merge_tree>
    <allow_remove_stale_moving_parts>true</allow_remove_stale_moving_parts>
</clickhouse>