Dialyzer is a tool that you’ve probably heard about in the Elixir community. You may have even used it. However, adding Dialyzer to an existing project can feel overwhelming when you see the wall of red and have 100s of errors. Hitting that resistance can turn people right around, running for the door. Noah Betzen shows us how adding Dialyzer doesn’t have to be scary. He walks us through the process on several existing public Elixir projects. He shares some tips and tricks that let us keep our productivity without getting overwhelmed.