diff --git a/.travis.yml b/.travis.yml
index 2b2ca7b..dc520a1 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -35,6 +35,9 @@ script:
   # Check the role/playbook's syntax.
   - "ansible-playbook main.yml --syntax-check"
 
+  # Copy test config.yml into place.
+  - "cp tests/config.yml config.yml"
+
   # Test the playbook.
   - "travis_wait 30 ansible-playbook --extra-vars '{\"configure_sudoers\":\"false\"}' main.yml"
 
diff --git a/tests/config.yml b/tests/config.yml
new file mode 100644
index 0000000..3976ad1
--- /dev/null
+++ b/tests/config.yml
@@ -0,0 +1,16 @@
+homebrew_installed_packages:
+  - autoconf
+  - bash-completion
+  - gettext
+  - sqlite
+  - ssh-copy-id
+  - cowsay
+  - readline
+  - pv
+  - wget
+  - wrk
+
+homebrew_cask_apps:
+  - firefox
+  - limechat
+  - macvim