Yeah, I am also a bit skeptical about the claim that Shakib, Tamim & co. 'don't care' about Test cricket. These remarks by Shakib were from earlier this year:
"Test cricket is one of my top priorities and I intend to carry on playing Test cricket as long as I can. If you ask me, Bangladesh still doesn’t have enough quality Test players, so I feel it is very important I continue to play as long my form and fitness permits. As a child, my dream was playing in whites for my country and that dream has an impact on how I look at different formats. But I’m afraid the younger cricketers might not necessarily have the same view and it’s no surprise some of them prefer the shorter formats."
Shakib al Hasan on the Future of Test Cricket