fix circeci

.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
 

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