diff --git a/README.md b/README.md
index 16c6fe2693d35ac3111a8a132d62eaedd47c55f4..b0344b2204f4c7a0ffaea138b53d046cff517e95 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,6 @@
 [![Homepage](https://img.shields.io/badge/Home-plumed.org-green.svg)](http://www.plumed.org)
 [![Homepage](https://img.shields.io/badge/Google_group-plumed--users-green.svg)](http://groups.google.com/forum/#!forum/plumed-users)
+[![Coverage Status](https://coveralls.io/repos/github/plumed/plumed2/badge.svg?branch=master)](https://coveralls.io/github/plumed/plumed2?branch=master)
 [![License: LGPL v3](https://img.shields.io/badge/License-LGPL%20v3-blue.svg)](http://www.gnu.org/licenses/lgpl-3.0)
 [![Github Releases](https://img.shields.io/github/release/plumed/plumed2.svg)](https://github.com/plumed/plumed2/releases)
 [![Twitter Follow](https://img.shields.io/twitter/follow/plumed_org.svg?style=social&label=Follow)](https://twitter.com/plumed_org)