"Chrome" and "Headless Chrome" are registered as separate launchers by Testem, and many systems (including the current CI infrastructure) will have both.

Running Headless Chrome in addition to Chrome results in:

• redundant testing
• harder to read test results
• longer CI jobs
• possible intermittent failures due to the lack of a graphical interface (reflected most immediately in the second instance of Chrome tests consistently failing in https://github.com/fluid-project/infusion/pull/956 until Headless Chrome was added to the skip list)

Currently we exclude the following browser launchers in Infusion's tests/testem.js testemOptions block:

{

...

skip: "PhantomJS,Opera,Safari",

...

}

I would propose we add Headless Chrome and skip it if available. I don't believe we've ever had a discussion about a need to have both available, but I may be wrong.