var contents = Transferable.of(...);
var containerLocation = "/path/to/file";
withCopyFileToContainer(contents, containerLocation)

fd = new FormData
fd.set('a', new Blob)
fd.get('a') === fd.get('a') // false in chromium - true in FF & Safari (don't have IE on Mac)

Looks like there is no test to cover this senario: https://github.com/web-platform-tests/wpt/blob/e45a9f9e65d039c76817ee2a6a1ef02c9311a1cb/xhr/formdata/set-blob.any.js

From what I understand, Travis will stop soon and builds are slow anyway. I'll do my best to work on this myself, but anyone is welcome to open a PR.

If at all possible, I think it would be good if the project's docker file is used for the CI too.

Seems that adding -e also suppress the exception name and cause. It would be great to keep them while supressing the traceback

Example with Arpeggio library:

Failure in tests.unit.test_promql.TestPromQLConversion.test_conversion (expr='sum by(pod)(rate(metric_test_app[2m] * 60)')
  File "/Users/ocervello/Workspace/dev/cloudops-migrator/tests/unit/test_promql.py", line 39, in test_con