3 files changed, 3 insertions, 3 deletions
diff --git a/tests/lib/Notification/ActionTest.php b/tests/lib/Notification/ActionTest.php
index 9160ea7a7c3..5103babd0e2 100644
--- a/tests/lib/Notification/ActionTest.php
+++ b/tests/lib/Notification/ActionTest.php
@@ -30,7 +30,7 @@ class ActionTest extends TestCase {
 	/** @var IAction */
 	protected $action;
 
-	public function setUp() {
+	public function setUp(): void {
 		parent::setUp();
 		$this->action = new Action();
 	}
diff --git a/tests/lib/Notification/ManagerTest.php b/tests/lib/Notification/ManagerTest.php
index 259ac0beefe..5de0b572607 100644
--- a/tests/lib/Notification/ManagerTest.php
+++ b/tests/lib/Notification/ManagerTest.php
@@ -40,7 +40,7 @@ class ManagerTest extends TestCase {
 	/** @var ILogger|MockObject */
 	protected $logger;
 
-	public function setUp() {
+	public function setUp(): void {
 		parent::setUp();
 		$this->validator = $this->createMock(IValidator::class);
 		$this->logger = $this->createMock(ILogger::class);
diff --git a/tests/lib/Notification/NotificationTest.php b/tests/lib/Notification/NotificationTest.php
index d72c9f62ae0..6b021ceb6d3 100644
--- a/tests/lib/Notification/NotificationTest.php
+++ b/tests/lib/Notification/NotificationTest.php
@@ -35,7 +35,7 @@ class NotificationTest extends TestCase {
 	/** @var IValidator|\PHPUnit_Framework_MockObject_MockObject */
 	protected $validator;
 
-	public function setUp() {
+	public function setUp(): void {
 		parent::setUp();
 		$this->validator = $this->createMock(IValidator::class);
 		$this->notification = new Notification($this->validator);