diff --git a/README.md b/README.md
index 1e60cd5..93c29c3 100644
--- a/README.md
+++ b/README.md
@@ -2,6 +2,14 @@
 
 A little template for Elixir projects.
 
+## Development
+
+You can run an interactive shell where to test your code:
+
+```sh
+iex -S mix
+```
+
 ## Testing
 
 This project uses [`mix test`](https://hexdocs.pm/mix/Mix.Tasks.Test.html) to run the tests: