The Aston Martin driver secured fourth place in the drivers' championship with a seventh place finish at the Yas Marina Circuit, but was noted by the stewards for an incident following his second pitstop in the season finale.
As he rejoined the circuit, with Hamilton's Mercedes closing behind, Alonso moved to the right-hand side of the road on the approach to the Turn 5 left-hand hairpin, then appeared to lift off the throttle.
This caught Hamilton off-guard, with the seven-time world champion reporting to his team that Alonso had brake tested him, however the stewards decided not to take any action after considering a charge of driving erratically.
Hamilton immediately passed Alonso using DRS, but the Spaniard retook the place and eventually finished two positions ahead of Hamilton after the Brit failed to make his final lap move on Yuki Tsunoda's AlphaTauri stick.
Speaking after the race, Alonso explained that he had slowed with the intention of allowing Hamilton through so he could instead gain DRS on the long drag towards Turn 6.
When asked for his response to Hamilton's brake test allegation, Alonso replied: "Lewis is obviously very clever and understands the sport really good and has a lot of experience but I have more."
Source: Autosport