Twitter confirmed on Tuesday it is testing a timeline format for its tweets, calling it an experiment.
The microblogging website's new format will result in tweets being sorted by relevance instead of in reverse chronological order.
"Yes, this is an experiment. We're continuing to explore ways to surface the best content for people using Twitter," spokeswoman Liina Potter said in an emailed statement.
The company, facing slowing user growth, has been experimenting under newly appointed Chief Executive Jack Dorsey to make its website more engaging.