diff --git a/DependencyInjection/DoctrineFixturesExtension.php b/DependencyInjection/DoctrineFixturesExtension.php
index 847d1cb..36680ab 100644
--- a/DependencyInjection/DoctrineFixturesExtension.php
+++ b/DependencyInjection/DoctrineFixturesExtension.php
@@ -17,6 +17,8 @@ class DoctrineFixturesExtension extends Extension
 {
     /**
      * {@inheritdoc}
+     *
+     * @return void
      */
     public function load(array $configs, ContainerBuilder $container)
     {
diff --git a/DoctrineFixturesBundle.php b/DoctrineFixturesBundle.php
index 83bce91..5053272 100644
--- a/DoctrineFixturesBundle.php
+++ b/DoctrineFixturesBundle.php
@@ -11,6 +11,7 @@
 
 class DoctrineFixturesBundle extends Bundle
 {
+    /** @return void */
     public function build(ContainerBuilder $container)
     {
         $container->addCompilerPass(new FixturesCompilerPass());
diff --git a/Tests/IntegrationTestKernel.php b/Tests/IntegrationTestKernel.php
index 90048f3..79632e5 100644
--- a/Tests/IntegrationTestKernel.php
+++ b/Tests/IntegrationTestKernel.php
@@ -79,6 +79,7 @@ public function getLogDir(): string
         return sys_get_temp_dir();
     }
 
+    /** @return void */
     protected function build(ContainerBuilder $container)
     {
         $container->addCompilerPass(new class implements CompilerPassInterface {