diff --git a/README.md b/README.md
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 ============
 
 [![Build Status](https://travis-ci.org/LLNL/spack.png?branch=develop)](https://travis-ci.org/LLNL/spack)
+[![Coverage Status](https://coveralls.io/repos/github/LLNL/spack/badge.svg?branch=develop)](https://coveralls.io/github/LLNL/spack?branch=develop)
 
 Spack is a package management tool designed to support multiple
 versions and configurations of software on a wide variety of platforms