One of the barriers into the UFC for Cris Cyborg continues to not be much of a problem.

Cyborg passed her fight-night drug test at Invicta FC on July 9 in Las Vegas, according to public documents obtained by MMAFighting.com from the Nevada Athletic Commission. Cyborg, whose real name is Cristiane Justino, failed a test for steroids in 2011 while fighting for Strikeforce and has come under the microscope for cheating in the past after repeated criticism from UFC women's bantamweight champion Ronda Rousey.

Last week, Cyborg threatened to sue Rousey for continuing to imply Justino was using performance-enhancing drugs.

@rondarousey you can not slander me with lies in the media. My lawyer will call @Primetime360ESM — Cris Cyborg (@criscyborg) August 2, 2015

All other Invicta FC 13 fighters also passed their drug tests, both for PEDs and recreational drugs. Justino defended her featherweight title against Faith Van Duin in the main event. There were also two other title fights: Tonya Evinger defeated Irene Aldana to win the vacant bantamweight belt and Ayaka Hamasaki upset Hercia Tiburcio for the atomweight strap.

Cyborg did not have to undergo any out-of-competition testing for this event. The fight-night testing at Invicta was done through urine and sent to Quest Diagnostics in Lenexa, Kan.

A fight between Rousey and Justino, the two best women's fighters in the world, has been brewing for years. Rousey has said she won't come up to Cyborg's weight of 145 or do a catchweight at 140. She and the UFC only want Cyborg to come down to 135 for a title fight. Rousey has said that if Cyborg can make 145 on steroids, then she can make 135 clean.

The UFC pays Cyborg's Invicta salary with the agreement that she will be able to make the weight to fight Rousey at some point down the line.

On Monday's edition of The MMA Hour, Cyborg's nutritionist George Lockhart told Ariel Helwani that he believes Cyborg can make that cut down to bantamweight and do it in a healthy manner.