diff --git a/.gitignore b/.gitignore
index 5556efb..61381e4 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,3 @@
 vendor
 phpunit.xml
+composer.lock
diff --git a/DependencyInjection/Configuration.php b/DependencyInjection/Configuration.php
index 4810b3a..290cbf3 100644
--- a/DependencyInjection/Configuration.php
+++ b/DependencyInjection/Configuration.php
@@ -18,8 +18,8 @@ class Configuration implements ConfigurationInterface
      */
     public function getConfigTreeBuilder()
     {
-        $builder = new TreeBuilder();
-        $root = $builder->root('frequence_web_calend_r');
+        $builder = new TreeBuilder('frequence_web_calend_r');
+        $root = method_exists($builder, 'getRootNode') ? $builder->getRootNode() : $builder->root('frequence_web_calend_r');
 
         $root
             ->children()
diff --git a/phpunit.xml.dist b/phpunit.xml.dist
index 695883e..a97f109 100644
--- a/phpunit.xml.dist
+++ b/phpunit.xml.dist
@@ -10,7 +10,6 @@
         convertWarningsToExceptions = "true"
         processIsolation            = "false"
         stopOnFailure               = "false"
-        syntaxCheck                 = "false"
         bootstrap                   = "Tests/bootstrap.php" >
 
     <testsuites>