MPTT test_reparent takes more than 500s
On drone with PostgreSQL [1], the test takes a very long time.
On my laptop the all MPTT test case takes only 28s on PostgreSQL (also 12.1).
What is strange is that other tests like test_active does almost the same thing but run in 1 second.
[1] https://drone.tryton.org/tryton/trytond/80/11