At Shopify, we use Game Day tests to practice how we react to unpredictable situations. Game Day tests involve deliberately triggering failure modes within our production systems, and analyzing whether the systems handle these problems in the ways we expect. I’ll walk through a set of best practices that we use for our internal Shopify Game Day tests, and how you can apply these guidelines to your own testing. Shopify’s primary responsibility is to provide our merchants with a stable ecommerce p...