Shopify Shipping Rule Testing Checklist: Don't Miss States, Weights, and Discounts

When changing shipping rules on a Shopify store, it's easy to miss issues if you only place a single test order. We previously changed our free shipping threshold, and as a result, shipping costs dropped to 0 in certain states after applying discount codes, which directly ate into our gross margin. My current testing checklist covers three dimensions: state and zip code, product weight, and…