How could I test torchvision model accuracy?

Hi,

I noticed torchvison added swin transformer, and the acc is higher than the experiment result reported in paper:
vision/swin_transformer.py at 3db30442a52e250c569ba131485fc432c8300f16 · pytorch/vision · GitHub
Would you tell me how could I test the pretrained model downloaded from the official website and achieved that result?