Hi, I tried to enable appending multiple pants config. https://github.com/pantsbuild/pants/compare/master...wisechengyi:append-overrides Test passes locally but fails on CI because bootstrap_option_values.config_override is expected to be a list but shows up as a string. As a result, full_configpaths has: CI: (u'/home/travis/build/wisechengyi/pants/pants.ini', 'p', 'a', 'n', 't', 's', '.', 't', 'r', 'a', 'v', 'i', 's', '-', 'c', 'i', '.', 'i', 'n', 'i') local: [u'/Users/yic/workspace/pants/pants.ini', 'pants.travis-ci.ini'] Any insight why the discrepancy happens? Tried maybe_list to wrap around but there is other issues later, so it's better to nail down the root cause of this discrepancy.