Jaime Alguersuari was asked on Sunday if he hoped his improved form in the month of June had silenced the doubters.
Daniel Ricciardo is waiting in the wings at Toro Rosso and Spaniard Alguersuari's sagging form in 2011 had marked him out as the cockpit occupant most likely to make way.
Alguersuari lost his temper with the "boring" speculation earlier at Valencia, where on Sunday he made up for a bad qualifying with a second consecutive run to eighth place.
"It's not my intention to shut mouths," he told AS sports newspaper after the race when asked if the good results in Canada and Valencia would silence the critics.
"I'm here to do the best job I can but I don't think it was better than Monaco, Barcelona and Canada. I'm not superman and have always done the best that I can do."
Earlier, Alguersuari had gritted his teeth when informing reporters that the only figure who will decide his future in Formula One is Red Bull's driver manager Dr Helmut Marko.
Jaime demonstrated he can deliver a strong race drive
But Toro Rosso team principal Franz Tost seemed happy on Sunday.
"Jaime demonstrated he can deliver a strong race drive, getting a good start and then running at a fast pace from the early stages onwards.
"In general, his performance curve is going upwards so we can expect more races like this from him in the future."