diff --git a/tests/unit/Storage/Validator/FileTypeTest.php b/tests/unit/Storage/Validator/FileTypeTest.php
index 4a685bd8c9..7041efefba 100644
--- a/tests/unit/Storage/Validator/FileTypeTest.php
+++ b/tests/unit/Storage/Validator/FileTypeTest.php
@@ -12,12 +12,12 @@ class FileTypeTest extends TestCase
      */
     protected $object = null;
 
-    public function setUp()
+    public function setUp(): void
     {
         $this->object = new FileType([FileType::FILE_TYPE_JPEG]);
     }
 
-    public function tearDown()
+    public function tearDown(): void
     {
     }
 
@@ -28,4 +28,4 @@ class FileTypeTest extends TestCase
         $this->assertEquals($this->object->isValid(__DIR__ . '/../../../resources/disk-b/kitten-1.png'), false);
         $this->assertEquals($this->object->isValid(__DIR__ . '/../../../resources/disk-b/kitten-2.png'), false);
     }
-}
\ No newline at end of file
+}