The 'Ikale Tahi take on the French Barbarians in Bordeaux this weekend before tests against Wales and Georgia.
Toutai Kefu said he already knows the bulk of what his 2019 World Cup squad will look like so the next few weeks are a chance for others to press their claims.
"We've got a group of players that we know that we'll take to the World Cup next year and we might look to rest some of those, depending on our squad, but first and foremost we want to win and we want to play well - that's the most important thing," he said.
