when I test on my own test(val)dataset ,the result is top_1 acc:0.45 top_5:0.75

Hi ,
My own dataset is a similar dataset to Kinetics,When I train ten epoch，i get the result as follow:

[INFO: logging.py: 96]: json_stats: {"_type": "train_iter", "epoch": "10/196", "eta": "12 days, 12:50:42", "gpu_mem": "5.37 GB", "iter": "1870/6178", "loss": 0.056469, "lr": 0.032643, " time_diff": 0.938987, "top1_err": 3.125000, "top5_err": 0.000000}

So I stop to train ,use the "./checkpoints/checkpoint_epoch_00011.pyth" to test the accuracy, i get the result as follows:

[INFO: logging.py: 96]: json_stats: {"split": "test_final", "top1_acc": "42.50", "top5_acc": "76.50"}
[06/17 11:34:28][INFO] slowfast.utils.logging: 96: json_stats: {"split": "test_final", "top1_acc": "42.50", "top5_acc": "76.50"}

why? Do you know the reason?