HIBS was forced to cancel training on Friday after a first-team player tested positive for Covid-19.
Jack Ross was by his side at East Mains to prepare for their clash with Aberdeen at Easter Road.
However, they took the step to postpone their session immediately once the test result became known.
The Hibs are now awaiting the result of another NHS test, which they are expected to receive today.
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SunSport understands that they are hoping that the result will turn out to be a false positive, as was the case in St Mirren last month.
The Buddies reported seven positive cases of Covid-19 after the tests were analyzed in a private lab.
But after being re-tested by the NHS, six of them were false positives.
It is understood that there is no threat to Sunday’s Premiership clash with the Dons, which is set to begin at 4:30 p.m.
Meanwhile, Hibs signed Rangers winger Jamie Murphy on a season-long loan.
And at the end of the current Premiership season, he will sign a one-year contract with the club.
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Murphy can’t wait to start with the Hibees.
He said: “I am delighted to have signed for Hibernian and can’t wait to get started.
“No one had to sell me the club and I’m lucky to know a few of the players so I’m sure it will be a smooth transition for me.
“I’ve seen how well the team started the season and I want to do my part to make sure we can continue from here.
Ross added: “Jamie Murphy is a proven quality player in the top of Scottish football, who has also gained a lot of experience in England and with the national team along the way.
“It gives us another option to complement the creative players we can already call on.
“For me it’s also obvious how keen he is to play football and win games.
“It goes loud and clear and I don’t have it twice, he will be a real asset for us. “
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