The unidentified patient is at a University Health Network facility.
After news leaked that the network had "a patient with a fever and travel history from West Africa," a note was sent out Thursday afternoon to inform staff about the situation.
"It is very unlikely that the patient has Ebola, but a test has been ordered as a precaution," according to the email sent by Gillian Howard, the hospital network's vice-president of public affairs.
The patient is in isolation. Until test results come back, staff will use personal protective equipment when interacting with the patient.
The note to staff indicates that "initial test results will be available within 24 hours."
Dr. Michael Gardam, director of infection prevention and control at UHN, told CBC News on Thursday evening that the hospital was following protocol.
"I'm not worried about this individual having Ebola. There's a number of circumstances around where they were and their symptoms, et cetera, which make it exceedingly unlikely that this person has Ebola virus," he said.
"That being said, they technically fit the criteria of someone we should test and this is something that we always follow through on."
The University Health Network is made up of the Princess Margaret Cancer Centre, Toronto General Hospital, Toronto Western Hospital and the Toronto Rehabilitation Institute.
In August, a man at a Brampton, Ont., hospital was isolated after he presented with flu-like symptoms after recently travelling to Nigeria. He tested negative for the Ebola virus.
The United States is currently dealing with a single case of Ebola in Dallas, a man who travelled to Texas from Liberia.
The outbreak in West Africa has killed some 3,300 people this year.
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