--cov-append for Travis only

Author: blueyed

.travis.yml

@@ -2,7 +2,7 @@ dist: xenial
 language: python
 env:
   global:
-    - PYTEST_ADDOPTS=-vv
+    - PYTEST_ADDOPTS="-vv --cov-append"
   matrix:
     - CI_TARGET=tests
 matrix:

tox.ini

@@ -11,10 +11,9 @@ deps =
   cov: pytest-cov
   pyuv: pyuv
 setenv =
-  cov: PYTEST_ADDOPTS=--cov=. --cov-append {env:PYTEST_ADDOPTS:}
+  cov: PYTEST_ADDOPTS=--cov=. {env:PYTEST_ADDOPTS:}
 passenv = PYTEST_ADDOPTS
 commands =
-  cov: coverage erase
   python -m pytest {posargs}
 
 [testenv:checkqa]