diff --git a/src/Assert.php b/src/Assert.php
index a548a67..dffc78d 100644
--- a/src/Assert.php
+++ b/src/Assert.php
@@ -16,7 +16,7 @@
 use JsonSchema\Validator;
 
 /**
- * Asserts to validate JSON data
+ * Asserts to validate JSON data.
  *
  * - All assert methods expect deserialised JSON data (an actual object or array)
  *   since the deserialisation method should be up to the user.
@@ -25,7 +25,7 @@
 trait Assert
 {
     /**
-     * Asserts that json content is valid according to the provided schema file
+     * Asserts that json content is valid according to the provided schema file.
      *
      * Example:
      *
@@ -37,10 +37,10 @@ trait Assert
     public static function assertJsonMatchesSchema($schema, $content)
     {
         $retriever = new UriRetriever();
-        $schema = $retriever->retrieve('file://' . realpath($schema));
+        $schema = $retriever->retrieve('file://'.realpath($schema));
 
         $refResolver = new RefResolver($retriever);
-        $refResolver->resolve($schema, 'file://' . __DIR__ . '/../Resources/schemas/');
+        $refResolver->resolve($schema, 'file://'.__DIR__.'/../Resources/schemas/');
 
         $validator = new Validator();
         $validator->check($content, $schema);
@@ -49,13 +49,13 @@ public static function assertJsonMatchesSchema($schema, $content)
         $messages = array_map(function ($e) use ($message) {
             return sprintf($message, $e['property'], $e['constraint'], $e['message']);
         }, $validator->getErrors());
-        $messages[] = '- Response: ' . json_encode($content);
+        $messages[] = '- Response: '.json_encode($content);
 
         self::assertTrue($validator->isValid(), implode("\n", $messages));
     }
 
     /**
-     * Asserts that json content is valid according to the provided schema string
+     * Asserts that json content is valid according to the provided schema string.
      *
      * @param string       $schema  Schema data
      * @param array|object $content JSON content
@@ -69,7 +69,7 @@ public static function assertJsonMatchesSchemaString($schema, $content)
     }
 
     /**
-     * Asserts if the value retrieved with the expression equals the expected value
+     * Asserts if the value retrieved with the expression equals the expected value.
      *
      * Example:
      *
@@ -90,6 +90,7 @@ public static function assertJsonValueEquals($expected, $expression, $json)
     /**
      * @param $expression
      * @param $data
+     *
      * @return mixed|null
      */
     public static function search($expression, $data)
@@ -98,13 +99,14 @@ public static function search($expression, $data)
     }
 
     /**
-     * Helper method to deserialise a JSON string into an object
+     * Helper method to deserialise a JSON string into an object.
      *
      * @param mixed $data The JSON string
+     *
      * @return array|object
      */
     public static function getJsonObject($data)
     {
         return (is_array($data) || is_object($data)) ? $data : json_decode($data);
     }
-}
\ No newline at end of file
+}
diff --git a/src/AssertClass.php b/src/AssertClass.php
index e61a4ed..47c0f04 100644
--- a/src/AssertClass.php
+++ b/src/AssertClass.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;
 
 class AssertClass extends \PHPUnit_Framework_TestCase
 {
     use Assert;
-}
\ No newline at end of file
+}
diff --git a/tests/AssertTraitImpl.php b/tests/AssertTraitImpl.php
index 5ebd023..c69b6d6 100644
--- a/tests/AssertTraitImpl.php
+++ b/tests/AssertTraitImpl.php
@@ -16,4 +16,4 @@
 class AssertTraitImpl extends \PHPUnit_Framework_TestCase
 {
     use JsonAssert;
-}
\ No newline at end of file
+}
diff --git a/tests/AssertTraitTest.php b/tests/AssertTraitTest.php
index 6f7e874..98a529a 100644
--- a/tests/AssertTraitTest.php
+++ b/tests/AssertTraitTest.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;
 
 class AssertTraitTest extends \PHPUnit_Framework_TestCase
@@ -48,12 +57,12 @@ public function testAssertJsonSchemaFailMessage()
     }
 
     /**
-     * Tests assertJsonValueEquals()
+     * Tests assertJsonValueEquals().
      *
      * @dataProvider assertJsonValueEqualsProvider
      *
      * @param string $expression
-     * @param mixed $value
+     * @param mixed  $value
      */
     public function testAssertJsonValueEquals($expression, $value)
     {
@@ -66,7 +75,7 @@ public function assertJsonValueEqualsProvider()
     {
         return [
             ['foo', '123'],
-            ['a.b.c[0].d[1][0]', 1]
+            ['a.b.c[0].d[1][0]', 1],
         ];
     }
 
@@ -94,8 +103,7 @@ public function testGetJsonObjectProvider()
             [[], []],
             [[], '[]'],
             [new \stdClass(), new \stdClass()],
-            [new \stdClass(), '{}']
+            [new \stdClass(), '{}'],
         ];
     }
-
 }