Bees boss Thomas Frank revealed the news shortly after the Bees team was named for Saturday's lunch-time kick-off at Fulham which is fourth against third.
"That's a confirmed test for Bryan," said Frank, speaking to Sky.
"The only reason why we didn't want to tell anybody was of course everyone knows that he would most likely have stated today if he was negative.
"No symptoms, fit and well, so unfortunately he of course needs to isolate just to keep everything into the right place for a safe environment.
"The good thing is our training ground is the safest place to be, because at the next test everyone was negaitve.
"It's just unfortunate, but that's the way it is."
A message from the Editor:
Thank you for reading this story on our website. These are challenging times but the team at the Yorkshire Evening Post need your support more than ever in the weeks ahead.
While I have your attention, I also have an important request to make of you. In order for us to continue to provide high quality and trusted local news on this free-to-read site, I am asking you - wherever possible and providing it is safe for you to do so - to also please purchase a copy of our newspaper.
Inevitably falling advertising revenues will start to have an impact on local newspapers and the way we continue to work during this period of uncertainty.
So the support of our readers has never been more important as we try to make sure that we keep you connected with the city you live in during this time.
But being your eyes and ears comes at a price. We need your support more than ever to buy our newspapers during this crisis.
Our team of trusted reporters are working incredibly hard behind the scenes - from kitchen tables and spare bedrooms - to look at how we can do this and your continued support to the YEP will help to protect its viability in the days and weeks ahead.
For more details on our subscription offers please visit www.localsubsplus.co.uk/YEP, email [email protected] or call us on 0330 4033004
READ MORE: https://www.yorkshireeveningpost.co.uk/news/opinion/were-therewithyou-now-your-yep-needs-your-support-too-laura-collins-yep-editor-2521777