diff --git a/.travis.yml b/.travis.yml
index cc06391f1..c3de422bb 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -9,12 +9,13 @@ php:
 
 sudo: false
 
-install: travis_retry composer install --no-interaction --ignore-platform-reqs --no-scripts --prefer-source
+install:
+  - travis_retry composer install --no-interaction --prefer-source
 
 script:
-  - if [ "$TRAVIS_PHP_VERSION" != "5.6" ]; then vendor/bin/phpunit; fi
-  - if [ "$TRAVIS_PHP_VERSION" == "5.6" ]; then vendor/bin/phpunit --coverage-clover build/logs/clover.xml; fi
+  - if [ "$TRAVIS_PHP_VERSION" != "5.5.9" ] && [ "$TRAVIS_PHP_VERSION" != "5.5" ] && [ "$TRAVIS_PHP_VERSION" != "5.6" ]; then vendor/bin/phpunit; fi
+  - if [ "$TRAVIS_PHP_VERSION" == "5.5.9" ] || [ "$TRAVIS_PHP_VERSION" == "5.5" ] || [ "$TRAVIS_PHP_VERSION" == "5.6" ]; then vendor/bin/phpunit --coverage-clover build/logs/clover.xml; fi
 
 after_script:
-  - if [ "$TRAVIS_PHP_VERSION" == "5.6" ]; then wget https://scrutinizer-ci.com/ocular.phar; fi
-  - if [ "$TRAVIS_PHP_VERSION" == "5.6" ]; then php ocular.phar code-coverage:upload --format=php-clover build/logs/clover.xml; fi
+  - if [ "$TRAVIS_PHP_VERSION" == "5.5.9" ] || [ "$TRAVIS_PHP_VERSION" == "5.5" ] || [ "$TRAVIS_PHP_VERSION" == "5.6" ]; then wget https://scrutinizer-ci.com/ocular.phar; fi
+  - if [ "$TRAVIS_PHP_VERSION" == "5.5.9" ] || [ "$TRAVIS_PHP_VERSION" == "5.5" ] || [ "$TRAVIS_PHP_VERSION" == "5.6" ]; then php ocular.phar code-coverage:upload --format=php-clover build/logs/clover.xml; fi