Also add pytest-xdist config option into pytest.ini config.
python_classes=*Test
testpaths=libcloud/test
# Show slowest 10 tests in the output
-addopts = --durations=10
+# for pytest-xdist, we want to distribute tests by file
+addopts = --durations=10 --dist loadfile
# Ignore UserWarning's
filterwarnings =
ignore::UserWarning
