1 files changed, 1 insertions, 1 deletions
diff --git a/tests/Unit/Service/FileOperationServiceTest.php b/tests/Unit/Service/FileOperationServiceTest.php
index 7df0aad..8ac2d3f 100644
--- a/tests/Unit/Service/FileOperationServiceTest.php
+++ b/tests/Unit/Service/FileOperationServiceTest.php
@@ -34,7 +34,7 @@ class FileOperationServiceTest extends MapperTestUtility
     /** @var FileOperationMapper */
     protected $mapper;
 
-    public function setUp()
+    public function setUp(): void
     {
         parent::setUp();