Hi Yurdik

Using sudo with browse is not the problem, the issue is that browse receive always a an id or a list of ids to browse. As opposite to search that receive a domain that could be empty the browse method really need the ids to retrieve the results. If you pass a list of ids to the browse you could make the asserts works, like:

search_objs =  env['res.partner'].sudo(user.id).search([])
browse_objs =  env['res.partner'].sudo(user.id).browse(search_objs)
assert len(search_objs) = len(browse_objs)# ok