diff --git a/.travis.yml b/.travis.yml
index 768b9cdb3f..d6234f4e48 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -7,9 +7,12 @@ python:
   - 3.6
 
 install:
-  - pip install -U tox-travis pip setuptools wheel
+  - pip install -U tox-travis coveralls pip setuptools wheel
   - pip install -r requirements_dev.txt
   - python setup.py build_ext --inplace
 
 script:
   - tox
+
+after_success:
+  - coveralls
diff --git a/README.rst b/README.rst
index f8943b2231..89dd7b7a70 100644
--- a/README.rst
+++ b/README.rst
@@ -11,3 +11,6 @@ more information.
 
 .. image:: https://ci.appveyor.com/api/projects/status/7d4iko59k8hpbbik?svg=true
     :target: https://ci.appveyor.com/project/alimanfoo/zarr
+
+.. image:: https://coveralls.io/repos/github/alimanfoo/zarr/badge.svg?branch=master
+    :target: https://coveralls.io/github/alimanfoo/zarr?branch=master
diff --git a/tox.ini b/tox.ini
index 8809d5e950..575004f996 100644
--- a/tox.ini
+++ b/tox.ini
@@ -11,11 +11,12 @@ setenv =
     PYTHONHASHSEED = 42
 commands =
     python setup.py build_ext --inplace
-    py27,py34,py35: nosetests -v zarr
-    py36: nosetests -v --with-coverage --cover-erase --cover-min-percentage=100 --cover-package=zarr --with-doctest --doctest-options=+NORMALIZE_WHITESPACE zarr
+    py27,py34,py35: nosetests -v --with-coverage --cover-erase --cover-package=zarr zarr
+    py36: nosetests -v --with-coverage --cover-erase --cover-package=zarr --with-doctest --doctest-options=+NORMALIZE_WHITESPACE zarr
     py36: python -m doctest -o NORMALIZE_WHITESPACE -o ELLIPSIS docs/tutorial.rst docs/spec/v2.rst
     py36: flake8 zarr
     python setup.py bdist_wheel
+    coverage report -m
 deps =
     -rrequirements_dev.txt