guzzlehttp/guzzle suggests installing psr/log (Required for using the Log middleware)
Writing lock file
Generating autoload files
$ phpunit --configuration phpunit.xml.dist

Warning: require_once(/builds/autoload.php): failed to open stream: No such file or directory in /builds/opensources/Airtime/tests/bootstrap.php on line 7

Fatal error: require_once(): Failed opening required '/builds/autoload.php' (include_path='.:/usr/local/lib/php') in /builds/opensources/Airtime/tests/bootstrap.php on line 7
section_end:1522050451:build_script
section_start:1522050451:after_script
section_end:1522050453:after_script
ERROR: Job failed: exit code 1