He went for the test after he experienced a throat irritation.
Buhari in a post on his official Twitter page wished Onyeama a speedy recovery.
The President expressed gratitude to Onyeama for his support in fighting to curb the spread of Coronavirus.
The tweet read: “I wish @GeoffreyOnyeama speedy recovery from Covid-19. Nigeria is eternally grateful for his diligence in attracting international support to defeat the pandemic and boost the economy.
“He has been a tireless worker and a strong pillar of our administration.”
As of Sunday, Nigeria has recorded over 36,000 cases and 778 deaths.
