17 - composer self-update
18 - composer clear-cache
21 - if [[ "$DEPENDENCIES" = 'high' ]]; then travis_retry composer update --no-interaction --no-ansi --no-progress --no-suggest --optimize-autoloader --prefer-stable; fi
22 - if [[ "$DEPENDENCIES" = 'low' ]]; then travis_retry composer update --no-interaction --no-ansi --no-progress --no-suggest --optimize-autoloader --prefer-stable --prefer-lowest; fi
26 - ./phpunit --configuration ./build/travis-ci-fail.xml > /dev/null; if [ $? -eq 0 ]; then echo "SHOULD FAIL"; false; else echo "fail checked"; fi;
27 - xmllint --noout --schema phpunit.xsd phpunit.xml
28 - xmllint --noout --schema phpunit.xsd tests/_files/configuration.xml
29 - xmllint --noout --schema phpunit.xsd tests/_files/configuration_empty.xml
30 - xmllint --noout --schema phpunit.xsd tests/_files/configuration_xinclude.xml -xinclude