diff --git a/.coveragerc b/.coveragerc
index 013dd20..6b8486c 100644
--- a/.coveragerc
+++ b/.coveragerc
@@ -1,2 +1,7 @@
+[run]
+branch = True
+source = src
+
 [report]
+precision = 2
 show_missing = True
diff --git a/.gitignore b/.gitignore
index 28fb036..5ac3617 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,6 +1,7 @@
 bin
 build
 dist
+htmlcov/
 lib
 parts
 
diff --git a/.travis.yml b/.travis.yml
index d0320d6..b33aead 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -11,10 +11,13 @@ install:
     - pip install six==1.10.0 # force to avoid conflict with zc.recipe.testrunner
     - pip install -U setuptools==33.1.1
     - pip install zc.buildout
+    - pip install coveralls coverage
     - buildout bootstrap
     - buildout
 script:
-    - bin/test -v1
+    - coverage run bin/test -v1
+after_success:
+    - coveralls
 notifications:
     email: false
 cache:
diff --git a/tox.ini b/tox.ini
index a89855b..5f3cd17 100644
--- a/tox.ini
+++ b/tox.ini
@@ -9,17 +9,21 @@ envlist =
     py36,
     py36-pure,
     pypy,
-    pypy3
+    pypy3,
+    coverage-report,
 
 [testenv]
 commands =
     {envbindir}/buildout -c {toxinidir}/buildout.cfg buildout:directory={envdir} buildout:develop={toxinidir} bootstrap
     {envbindir}/buildout -c {toxinidir}/buildout.cfg buildout:directory={envdir} buildout:develop={toxinidir}
-    {envbindir}/test {posargs:-vc1}
+    coverage run {envbindir}/test {posargs:-vc1}
 skip_install = true
 deps =
     setuptools==33.1.1
     zc.buildout
+    coverage
+setenv =
+    COVERAGE_FILE=.coverage.{envname}
 
 [testenv:py27-pure]
 basepython =
@@ -44,3 +48,16 @@ basepython =
     python3.6
 setenv =
     PURE_PYTHON = 1
+
+[testenv:coverage-report]
+basepython = python3.6
+deps = coverage
+setenv =
+    COVERAGE_FILE=.coverage
+skip_install = true
+commands =
+    coverage erase
+    coverage combine
+    coverage html -i
+    coverage xml -i
+    coverage report -i --fail-under=97