diff --git a/tests/unit/Resize/ResizeTest.php b/tests/unit/Resize/ResizeTest.php
index f75d7d1e0f..eeb089f8cd 100644
--- a/tests/unit/Resize/ResizeTest.php
+++ b/tests/unit/Resize/ResizeTest.php
@@ -7,11 +7,11 @@ use PHPUnit\Framework\TestCase;
 
 class ResizeTest extends TestCase
 {
-    public function setUp()
+    public function setUp(): void
     {
     }
 
-    public function tearDown()
+    public function tearDown(): void
     {
     }
 
@@ -167,4 +167,4 @@ class ResizeTest extends TestCase
         $this->assertEquals('GIF', $image->getImageFormat());
         \unlink($target);
     }
-}
\ No newline at end of file
+}