call coveage xml because its in tox env

.travis.yml

@@ -17,6 +17,7 @@ install:
 script:
   - tox -v -- -v
 after_success:
+  - .tox/$TRAVIS_PYTHON_VERSION/bin/coverage xml
   - .tox/$TRAVIS_PYTHON_VERSION/bin/codecov -e TOXENV
 notifications:
   irc: