I've written similar: https://sendgrid.com/blog/when-writing-unit-tests-dont-use-mocks/ https://sendgrid.com/blog/when-writing-unit-tests-dont-use-m... So has

I've written similar: https://sendgrid.com/blog/when-writing-unit-tests-dont-use-mocks/ https://sendgrid.com/blog/when-writing-unit-tests-dont-use-m... So has Martin Fowler: https://martinfowler.com/articles/mocksArentStubs.html https://martinfowler.com/articles/mocksArentStubs.html The TL;DR: Mocks increase coupling and make systems harder to change. Fakes are more versatile.