tests: don't silence errors while creating test index "Errors should never pass silently." For example, I had the problem, that a previous test did not clean up the lock file for the index_dir, which then caused the future tests to fail. Because the error has been silenced, it took a while until I found the reason.

babel >= 0.9.6, < 2.4
waitress >= 0.8.8, < 1.0
pytest ~= 3.0
pytest-runner
pytest-sugar>=0.7.0
pytest-benchmark
pytest-catchlog
pytest-localserver
mock
sphinx
webtest < 3