On trial, not in commercial runs
I am not sure whether it was tejas livery or not
See the images attached, in both image arrival at AGC is same ie 14:55, but in one case, where booked speed is 160 NZM arrival is at 17:00, while with 130 booked speed NZM arrival is 17:11. Also you can see specific energy consumption figures, for 160 run it is close to 31 units per 1000 GTKM, while for 130 run it is around 25, an almost 20% increase in energy consumption at that speed.