The flight sought an emergency landing after its pilot was informed about warning about the presence of a bomb in the cargo hold.
Prime Minister Narendra Modi will be on a two-day visit to the North East from Tuesday, during which he will attend the oath-taking ceremonies of new governments in three states of the region.
In case the test is negative, the passenger will still have to undergo seven-day home quarantine.
A 61-year-old American national, identified as Winston Marshal Carmichael, was detained at the Indira Gandhi International airport in New Delhi on late on Wednesday night minutes before he was to board a Qatar-bound flight after a knife was found in his hand baggage.