I create a new group "testgroup" with only one member "testuser".

Now from the "new leave request" view I try to hide a field:

<field name="number_of_days_temp" class="oe_inline" groups="base.testgroup"/>

But it is not working.

What should I write instead of groups="base.testgroup"?

If I use a standard group like groups="base.group_hr_manager" everything is working fine. The problem is only with the groups I create.