diff --git a/.php-cs-fixer.php b/.php_cs
similarity index 100%
rename from .php-cs-fixer.php
rename to .php_cs
diff --git a/.travis.yml b/.travis.yml
index 7eae43d..1d15098 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -7,8 +7,12 @@ dist: trusty
 language: php
 
 before_install:
+  - echo 'sendmail_path = /bin/true' >> ~/.phpenv/versions/$(phpenv version-name)/etc/conf.d/travis.ini
   - composer self-update
-  - composer global require satooshi/php-coveralls:@stable
+  - composer global require --no-update hirak/prestissimo:@stable
+  - composer global require --no-update phpunit/phpunit:@stable
+  - composer global require --no-update satooshi/php-coveralls:@stable
+  - composer global update
   - export PATH="$PATH:$HOME/.composer/vendor/bin"
 
 install:
diff --git a/composer.json b/composer.json
index 8ac5fab..f81ab69 100644
--- a/composer.json
+++ b/composer.json
@@ -66,7 +66,7 @@
     },
     "scripts": {
         "coveralls": "coveralls -v; exit 0",
-        "php-cs-fixer": "php-cs-fixer fix --config-file .php-cs-fixer.php; exit 0",
+        "php-cs-fixer": "php-cs-fixer fix; exit 0",
         "phpunit": "phpunit -c phpunit.xml.dist; exit 0",
         "sami": "sami.php update .sami.php; exit 0"
     },