Actually there was nothing wrong with the tests by themselves, but rather with the
Odoo Form class in odoo/tests/common.py.
This commit disables one tests and works around the bugs in another.
Display the recompute button only after saving the settings if the order hase changed. Once the recompute is done, the buttons desapears.
Bedore this change it was not possible to recompute the partner names order since the button was only displayed after changing the order value but before saving the changes. When clicked, an error message was displayed since the action will force the reload of the page before saving the values...