diff --git a/.travis.yml b/.travis.yml
index 8327ded..4e24184 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -3,5 +3,7 @@ language: python
 python:
   - "2.7"
   - "3.6"
-install: pip install tox-travis
+install: pip install tox-travis coveralls
 script: tox
+after_success:
+  - coveralls
diff --git a/README.md b/README.md
index 7af5a42..33688a4 100644
--- a/README.md
+++ b/README.md
@@ -3,6 +3,7 @@
 Zappy is for distributed processing of chunked NumPy arrays on engines like [Pywren], Apache Spark, and Apache Beam.
 
 [![Build Status](https://travis-ci.org/lasersonlab/zappy.svg?branch=master)](https://travis-ci.org/lasersonlab/zappy)
+[![License](https://img.shields.io/badge/License-Apache%202.0-blue.svg)](https://opensource.org/licenses/Apache-2.0)
 
 The `zappy.base` module defines a `ZappyArray` class that exposes the same interface as `numpy.ndarray`, and which
 is backed by distributed storage and processing. The array is broken into chunks, and is typically loaded from [Zarr],
diff --git a/requirements_dev.txt b/requirements_dev.txt
index 36fb2da..a9a417c 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -1,6 +1,8 @@
+coveralls
 future
 numpy
 pyspark
 pytest
+pytest-cov
 tox
 zarr
diff --git a/tests/__init__.py b/tests/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/tox.ini b/tox.ini
index 220cc7e..aa13288 100644
--- a/tox.ini
+++ b/tox.ini
@@ -5,4 +5,5 @@ envlist = py27,py36
 deps =
     py27: apache-beam==2.5.0
     py27,py36: -rrequirements_dev.txt
-commands = pytest
+commands = pytest -v --cov=zappy tests
+passenv = TRAVIS TRAVIS_*