PayPal Debit Card Question

I normally only use credit cards, but many of us on here also use the PayPal debit card, and it's great. 5% on your monthly category of choice, up to $1k.

I've been getting 5% back on Costco purchases, but I need to purchase a battery.

I'm a bit concerned that since it's from Costco's automotive department, I won't be getting 5% coded as Groceries.

Does anyone have experience with this? Thanks!