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FAIL: bob.extension.test_click_helper.test_prefix_aliasing
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Traceback (most recent call last):
  File "/Users/gitlab/builds/b6d3167a/0/bob/bob.nightlies/miniconda/conda-bld/bob.extension_1551126299541/_test_env_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placeho/lib/python3.6/site-packages/nose/case.py", line 197, in runTest
    self.test(*self.arg)
  File "/Users/gitlab/builds/b6d3167a/0/bob/bob.nightlies/miniconda/conda-bld/bob.extension_1551126299541/_test_env_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placeho/lib/python3.6/site-packages/bob/extension/test_click_helper.py", line 178, in test_prefix_aliasing
    assert result.exit_code == 0, (result.exit_code, result.output)
AssertionError: (2, 'Usage: cli [OPTIONS] COMMAND [ARGS]...\nTry "cli --help" for help.\n\nError: No such command "test_a".\n')

This is due to upgrade of click from 6 to 7.