diff --git a/Tests/Session/Storage/Handler/MigratingSessionHandlerTest.php b/Tests/Session/Storage/Handler/MigratingSessionHandlerTest.php
index 6dc5b0cb5..01615e6b1 100644
--- a/Tests/Session/Storage/Handler/MigratingSessionHandlerTest.php
+++ b/Tests/Session/Storage/Handler/MigratingSessionHandlerTest.php
@@ -20,7 +20,7 @@ class MigratingSessionHandlerTest extends TestCase
     private $currentHandler;
     private $writeOnlyHandler;
 
-    protected function setUp()
+    protected function setUp(): void
     {
         $this->currentHandler = $this->createMock(\SessionHandlerInterface::class);
         $this->writeOnlyHandler = $this->createMock(\SessionHandlerInterface::class);
diff --git a/Tests/Session/Storage/Handler/RedisClusterSessionHandlerTest.php b/Tests/Session/Storage/Handler/RedisClusterSessionHandlerTest.php
index 7d85a59ee..c1ba70dcb 100644
--- a/Tests/Session/Storage/Handler/RedisClusterSessionHandlerTest.php
+++ b/Tests/Session/Storage/Handler/RedisClusterSessionHandlerTest.php
@@ -13,7 +13,7 @@
 
 class RedisClusterSessionHandlerTest extends AbstractRedisSessionHandlerTestCase
 {
-    public static function setupBeforeClass()
+    public static function setUpBeforeClass(): void
     {
         if (!class_exists('RedisCluster')) {
             self::markTestSkipped('The RedisCluster class is required.');