diff --git a/.circleci/config.yml b/.circleci/config.yml
index 5df6cbb2e1976830d4aae727dd18ae2d8b85116b..afd1372b2ed3bd201cfce555b1b0fa11bf73209c 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -30,7 +30,7 @@ jobs:
       - run:
           name: install dependencies
           command: |
-            sudo python -m pip install --upgrade pip setuptools wheel mock pytest
+            sudo python -m pip install --upgrade pip setuptools wheel mock pytest  pytest-cov
             sudo python -m pip install -r requirements.txt
             sudo python -m pip install --upgrade pycodestyle pyflakes coverage tox codacy-coverage virtualenv
 
diff --git a/tox.ini b/tox.ini
index 1c5f2f2b610a474c58e7c2a86da101fad08865a5..2d5a71d6d16e069bdb5afdf58aafb7da2a2fdd06 100644
--- a/tox.ini
+++ b/tox.ini
@@ -34,8 +34,7 @@ commands =
 [testenv:coverage]
 deps = coverage
 commands =
-    {envpython} -m coverage run -m unittest discover -p "*test*" -s tests
-    {envpython} -m coverage xml
+    py.test --cov-report xml:coverage.xml
 
 [testenv:upload_coverage]
 deps = coverage