Also lint test source files.
Also lint test source files.

MartinhoOmura/phpcpd,dnalini/PHP,majisti/phpcpd,aboks/phpcpd,leonardosmleo/phpcpd,Ocramius/phpcpd,ericariyanto/phpcpd,sebastianbergmann/phpcpd,Ocramius/phpcpd,maglnet/phpcpd,scrutinizer-ci/phpcpd