How come my brake self adjusters won't self adjust?

[aggressive male]

I'm wondering why my rear brake drum self adjusters don't seem to be adjusting, I took off the drum and I can turn the adjuster by hand and it ratchets against the self adjuster as I turn it by hand. Am I supposed to drive fast backwards and slam on the brakes hard to get the self adjusters to work or is just normal driving supposed to adjust them? Thanks