Jack Dorsey's micro-blogging site is trialing the function which enables users to use their voice to produce a single tweet from 140-second of audio.
Currently, voice-tweeting is available for a select number of Twitter users on Apple's iOS, but will come to more in the coming weeks.
To create a voice tweet, you select the "wavelengths" icon.
Twitter spokeswoman Aly Pavela told Reuters: "We are working to incorporate additional monitoring systems ahead of bringing this to everyone.
"We'll review any reported voice tweets in line with our rules, and take action, including labeling, as needed."
The test comes after Twitter started testing a new feature that will "prompt" users who haven't read the full article they've retweeted.
The app wants to make sure that their users are well "informed" when they share links to articles on their app and so they are currently trialing a new feature on Android.
A tweet on the Twitter Support page reads: "Sharing an article can spark conversation, so you may want to read it before you Tweet it.
"To help promote informed discussion, we're testing a new prompt on Android -- when you Retweet an article that you haven't opened on Twitter, we may ask if you'd like to open it first."
For now, the prompts will only be on US Android devices.
Meanwhile, Dorsey came under fire from US President Donald Trump after Twitter fact-checked and labelled his tweet for containing misinformation.
The CEO defended the decision to put a warning label against the post and a subsequent tweet, after the politician made a claim without providing any tangible evidence.