1 files changed, 1 insertions, 1 deletions
diff --git a/tests/Unit/Db/FileOperationMapperTest.php b/tests/Unit/Db/FileOperationMapperTest.php
index 2ac5519..6997c9e 100644
--- a/tests/Unit/Db/FileOperationMapperTest.php
+++ b/tests/Unit/Db/FileOperationMapperTest.php
@@ -32,7 +32,7 @@ class FileOperationMapperTest extends MapperTestUtility
     /** @var array */
     protected $fileOperations;
 
-    public function setUp()
+    public function setUp(): void
     {
         parent::setUp();