fixed coverage for pypy

.travis.yml

@@ -20,10 +20,10 @@ jobs:
       python: "pypy3.5"
       before_script:
         - pypy3 -m pip install -r requirements.txt
-        - pypy3 -m pip install pytest coverage pytest-cov
+        - pypy3 -m pip install pytest
       script:
         - pypy3 setup.py install
-        - pypy3 setup.py test
+        - pytest
       after_script:
         - echo "Do nothing"
     - stage: test

setup.cfg

@@ -39,4 +39,3 @@ universal = 0
 
 [options]
 python_requires = !=2.7.*,!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,!=3.4.*
-test_suite = tests