How to properly unpickle a file?

1

I have done a small experiment:
Using torch.save and torch.load works as expected

l = [1, 2, 3]
torch.save(l, 'test.pkl')
l = torch.load('test.pkl')

But when I try torch.save with pickle.load I got an error. Is it wrong approach?

l = [1, 2, 3]
torch.save(l, 'test.pkl')
with open('test.pkl', mode='rb') as f:
    l = pickle.load(f)

Traceback is:

UnpicklingError: A load persistent id instruction was encountered,
but no persistent_load function was specified.

Is it wrong to use torch.save with pickle.load?