diff --git a/.travis.yml b/.travis.yml
index e2b3080..2e3204a 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -29,7 +29,7 @@ before_install:
     - phpenv config-rm xdebug.ini
     - if [ "$SF_4" == "true" ]; then composer config minimum-stability dev; fi
     - if [ "$SF_4" == "true" ]; then composer require symfony/symfony:4.0.* --dev --no-update; fi
-    - if [ "$SF_4" == "true" ]; then composer require friendsofsymfony/rest-bundle:dev-master --dev --no-update; fi
+    - if [ "$SF_4" == "true" ]; then composer require jms/serializer-bundle:dev-master --dev --no-update; fi
 
 install: composer update $COMPOSER_FLAGS --prefer-stable
 
diff --git a/composer.json b/composer.json
index 6d10ec7..354c5c1 100644
--- a/composer.json
+++ b/composer.json
@@ -22,6 +22,9 @@
         "zircote/swagger-php": "^2.0.9"
     },
     "require-dev": {
+        "symfony/yaml": "Temporary: see https://github.com/symfony/symfony/pull/24634/files#r153192689",
+        "symfony/yaml": "^2.8|^3.0|^4.0",
+
         "symfony/templating": "^2.8|^3.0|^4.0",
         "symfony/twig-bundle": "^3.0|^4.0",
         "symfony/asset": "^2.8|^3.0|^4.0",
diff --git a/phpunit.xml.dist b/phpunit.xml.dist
index fb133f5..58e4a52 100644
--- a/phpunit.xml.dist
+++ b/phpunit.xml.dist
@@ -8,6 +8,7 @@
          bootstrap="vendor/autoload.php"
 >
     <php>
+        <env name="SHELL_VERBOSITY" value="-1" />
         <ini name="error_reporting" value="-1" />
         <env name="SYMFONY_DEPRECATIONS_HELPER" value="weak_vendors" />
     </php>