Jemma Reekie beat world champion Halimah Nakaayi over 800m in France to record her second IAAF World Indoor Series win in five days.
The Scot won in two minutes and 0.34 seconds to beat the Ugandan - who won gold in Doha in October - in Lievin.
Reekie, 21, won the 1500m at the Grand Prix in Glasgow on Saturday, having recently broken three British indoor records inside a week.
Two of those belonged to training partner Laura Muir.
Reekie, a double European Under-23 champion in Sweden last year, beat Muir in Glasgow at the start of February to cut a second off Jenny Meadows' indoor 800m record.
And she followed that by besting Muir's indoor mile mark in New York - eclipsing her compatriot's 1500m record along the way.
"Finishing off a great indoor season with a win. Now to get back into training for summer," Reekie wrote on Twitter.
"Thanks to everyone for the support and to my coach [Andy Young] for preparing me well. I've enjoyed every minute."