diff --git a/.gitignore b/.gitignore
index 45ce6ce..c378754 100644
--- a/.gitignore
+++ b/.gitignore
@@ -6,3 +6,4 @@
 /docs
 /doc
 mix.lock
+cover/
diff --git a/.travis.yml b/.travis.yml
index 55966a6..2629f6f 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -27,6 +27,9 @@ notifications:
     - self@falood.me
 before_script:
   - mix deps.get --only test
+script:
+  - mix test
+  - MIX_ENV=test mix coveralls.travis
 after_script:
   - MIX_ENV=docs mix deps.get
   - MIX_ENV=docs mix inch.report
diff --git a/README.md b/README.md
index 9123c8f..12b8423 100644
--- a/README.md
+++ b/README.md
@@ -7,6 +7,7 @@
 [![Deps Status](https://beta.hexfaktor.org/badge/all/github/elixir-maru/maru.svg?branch=master&style=flat-square)](https://beta.hexfaktor.org/github/elixir-maru/maru)
 [![Docs](https://inch-ci.org/github/elixir-maru/maru.svg?branch=master&style=flat-square)](https://inch-ci.org/github/elixir-maru/maru)
 [![Hex.pm Downloads](https://img.shields.io/hexpm/dt/maru.svg?style=flat-square)](https://hex.pm/packages/maru)
+[![Coverage Status](https://coveralls.io/repos/github/elixir-maru/maru/badge.svg?branch=master)](https://coveralls.io/github/elixir-maru/maru?branch=master)
 
 ## Usage
 
diff --git a/mix.exs b/mix.exs
index e23ea70..5c75fd7 100644
--- a/mix.exs
+++ b/mix.exs
@@ -16,7 +16,9 @@ defmodule Maru.Mixfile do
       docs: [
         extras: ["README.md"],
         main: "readme",
-      ]
+      ],
+      test_coverage: [tool: ExCoveralls],
+      preferred_cli_env: ["coveralls": :test, "coveralls.detail": :test, "coveralls.post": :test, "coveralls.html": :test],
     ]
   end
 
@@ -33,6 +35,7 @@ defmodule Maru.Mixfile do
       { :inch_ex, "~> 0.5",  only: :docs },
       { :earmark, "~> 1.2",  only: :docs },
       { :ex_doc,  "~> 0.16", only: :docs },
+      { :excoveralls, "~> 0.7.4", only: [:dev, :test] },
     ]
   end