Quibble --commands option is deprecated since March 2019 / version 0.33:

--commands [COMMAND ...]    DEPRECATED: use -c COMMAND -c COMMAND

That was done by c4c02f9edd9f4288283cf7cc1932198d7d4b5d21 / T218357. I have originally made it to accept a list of arguments, each of them to be executed as single command:

--commands 'echo hello' 'exec phpunit --debug'

It is less error prone to instead do:

-c 'echo hello' -c 'exec phpunit --debug'

Hence the deprecation.

• Update CI jobs to drop usage of --commands
• Remove --commands from Quibble