Instagram is hiding the number of 'likes' on posts in several countries, including Australia and Japan, to "remove pressure" on users.
Instagram launched a similar trial in Canada in May and the new test is rolling out in Australia, New Zealand, Ireland, Italy, Japan and Brazil.
At the moment, Instagram users see a running total of people who have 'liked' a post.
However, there is concern that social media platforms can contribute to low self-esteem and feelings of inadequacy in young people.
Studies suggest this kind of instant feedback on content can boost people's self-esteem but bring others down if they do not get as many 'likes'.
The number of 'likes' is also the way to put value on a post for the business side of Instagram.
Influencers who get paid for the content they showcase earn based on the number of 'likes' their social media activity draws.
Earlier this month, Instagram also revealed a new feature to tackle online bullying.