Turning off scheduled tasks in OJS

Good morning,

I am looking for a simple way to disable all scheduled tasks in OJS.
When I’m working with a clone of an existing site (for testing purposes), setting “scheduled_tasks” to “Off” in config.inc.php does not seem to be sufficient, judging by “last_run” in the database table “scheduled_tasks”.

Removing or otherwise making unavailable plugins/generic/acron does seem to work.

I was wondering if (temporarily) emptying the database table “scheduled_tasks” would also be sufficient to stop all scheduled_tasks.

Thanks in advance,
Jan Pieter Kunst