diff --git a/.travis.yml b/.travis.yml
index 5e7a67aa..ed6d3ed4 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -14,6 +14,7 @@ install:
   - if [[ -e build-requirements-${TRAVIS_PYTHON_VERSION}.txt ]]; then travis_retry pip install -r build-requirements-${TRAVIS_PYTHON_VERSION}.txt; else travis_retry pip install -r build-requirements.txt; fi
 script:
   - coverage run setup.py test
+  - [[ $TRAVIS_PYTHON_VERSION != 3.2 ]] && pytest --cov --cov-append --cov-branch ecdsa ecdsa/
   - python setup.py speed
 after_success:
   - coveralls
diff --git a/build-requirements-2.6.txt b/build-requirements-2.6.txt
index 980e00df..40626709 100644
--- a/build-requirements-2.6.txt
+++ b/build-requirements-2.6.txt
@@ -2,3 +2,5 @@ tox
 coveralls<1.3.0
 idna<2.8
 unittest2
+pytest==3.1.1
+pytest-cov<3.8.0
diff --git a/build-requirements-3.2.txt b/build-requirements-3.2.txt
index 3b599b55..4995efa0 100644
--- a/build-requirements-3.2.txt
+++ b/build-requirements-3.2.txt
@@ -7,3 +7,4 @@ PyYAML<3.13
 tox<3.0
 wheel<0.30
 virtualenv==15.2.0
+pytest>2.7.3
diff --git a/build-requirements-3.3.txt b/build-requirements-3.3.txt
index de3e0b74..89411b41 100644
--- a/build-requirements-3.3.txt
+++ b/build-requirements-3.3.txt
@@ -2,3 +2,7 @@ python-coveralls
 tox<3.0
 wheel<0.30
 virtualenv==15.2.0
+pytest<3.3.0
+logilab-common
+pytest-cov
+py<1.5
diff --git a/build-requirements.txt b/build-requirements.txt
index ae10411c..1cfdfe2e 100644
--- a/build-requirements.txt
+++ b/build-requirements.txt
@@ -1 +1,3 @@
 python-coveralls
+pytest>3.0.7
+pytest-cov<2.7.0