try to fix CI

.travis.yml

@@ -36,14 +36,10 @@ matrix:
 
 install:
     - pip install --upgrade pip
-    - pip install 'tox>=2.3.1' coveralls
+    - travis_retry pip install 'tox>=2.3.1' coveralls
 
-script: COMMAND='coverage run --source=reversion_compare' tox -e$TOXENV
-
-after_success:
-    - coverage combine
-    - coverage report
-    - coveralls
+script:
+  - travis_retry tox
 
 notifications:
     irc: "irc.freenode.org#pylucid"

tox.ini

@@ -1,8 +1,14 @@
+# Tox (http://tox.testrun.org/) is a tool for running tests
+# in multiple virtualenvs. This configuration file will run the
+# test suite on all supported python versions. To use it, "pip install tox"
+# and then run "tox" from this directory.
+
 [tox]
 envlist =
     {py27,py34,py35}-django{18,19,110}{-dmp,}
 
 [testenv]
+passenv = TRAVIS TRAVIS_JOB_ID TRAVIS_BRANCH
 usedevelop = True
 
 deps =
@@ -13,4 +19,5 @@ deps =
 
 commands =
     python --version
-    {env:COMMAND:python} runtests.py
+    coverage run --source=reversion_compare runtests.py
+    coveralls