diff --git a/src/Extension/SymfonyClass.php b/src/Extension/SymfonyClass.php
index 78295de..ef86108 100644
--- a/src/Extension/SymfonyClass.php
+++ b/src/Extension/SymfonyClass.php
@@ -1,8 +1,17 @@
 <?php
 
+/*
+ * This file is part of the phpunit-json-assertions package.
+ *
+ * (c) Enrico Stahn <enrico.stahn@gmail.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
 namespace EnricoStahn\JsonAssert\Extension;
 
 class SymfonyClass extends \PHPUnit_Framework_TestCase
 {
     use Symfony;
-}
\ No newline at end of file
+}
diff --git a/tests/Extension/SymfonyTest.php b/tests/Extension/SymfonyTest.php
index 116f154..03e2569 100644
--- a/tests/Extension/SymfonyTest.php
+++ b/tests/Extension/SymfonyTest.php
@@ -1,5 +1,14 @@
 <?php
 
+/*
+ * This file is part of the phpunit-json-assertions package.
+ *
+ * (c) Enrico Stahn <enrico.stahn@gmail.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
 namespace EnricoStahn\JsonAssert\Tests\Extension;
 
 use EnricoStahn\JsonAssert\Extension\Symfony;
@@ -30,4 +39,4 @@ public function testAssertJsonValueEquals()
 
         Symfony::assertJsonValueEquals(123, 'foo', $response);
     }
-}
\ No newline at end of file
+}
diff --git a/tests/Utils.php b/tests/Utils.php
index 76904bf..0ad108c 100644
--- a/tests/Utils.php
+++ b/tests/Utils.php
@@ -1,13 +1,23 @@
 <?php
 
+/*
+ * This file is part of the phpunit-json-assertions package.
+ *
+ * (c) Enrico Stahn <enrico.stahn@gmail.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
 namespace EnricoStahn\JsonAssert\Tests;
 
 class Utils
 {
     /**
-     * Returns the full path of the schema file
+     * Returns the full path of the schema file.
      *
      * @param string $filename The filename of the schema file
+     *
      * @return string
      */
     public static function getSchemaPath($filename)
@@ -16,13 +26,14 @@ public static function getSchemaPath($filename)
     }
 
     /**
-     * Returns the full path of the schema file
+     * Returns the full path of the schema file.
      *
      * @param string $filename The filename of the json file
+     *
      * @return string
      */
     public static function getJsonPath($filename)
     {
         return implode(DIRECTORY_SEPARATOR, [__DIR__, 'json', $filename]);
     }
-}
\ No newline at end of file
+}