diff --git a/.tool-versions b/.tool-versions
new file mode 100644
index 0000000..5d9f192
--- /dev/null
+++ b/.tool-versions
@@ -0,0 +1,2 @@
+erlang 19.0
+elixir 1.3.2
diff --git a/README.md b/README.md
index e660628..c9ab3d4 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,5 @@
+[![CircleCI](https://circleci.com/gh/thoughtbot/redbird.svg?style=svg&circle-token=ffeb06ba85ab9e15f98730027745be851d647b61&branch=master)](https://circleci.com/gh/thoughtbot/redbird)
+
 # Redbird
 
 **Redbird is part of the [thoughtbot Elixir family][elixir-phoenix] of projects.**
diff --git a/bin/test_suite b/bin/test_suite
old mode 100644
new mode 100755
diff --git a/circle.yml b/circle.yml
new file mode 100644
index 0000000..d5307a8
--- /dev/null
+++ b/circle.yml
@@ -0,0 +1,22 @@
+machine:
+  environment:
+    PATH: "./bin:$HOME/.asdf/bin:$HOME/.asdf/shims:$PATH"
+  services:
+    - redis
+dependencies:
+  pre:
+    - if ! asdf | grep version; then git clone https://github.com/HashNuke/asdf.git ~/.asdf; fi
+    - asdf plugin-add erlang https://github.com/HashNuke/asdf-erlang.git || true
+    - asdf plugin-add elixir https://github.com/HashNuke/asdf-elixir.git || true
+    - asdf install
+    - mix local.hex --force
+    - mix local.rebar --force
+    - yes | mix deps.get
+  cache_directories:
+    - ~/.mix
+    - ~/.asdf
+    - deps
+test:
+  override:
+    - MIX_ENV=prod mix compile --warnings-as-errors
+    - bin/test_suite