diff --git a/tests/MatrixHttpApiTest.php b/tests/MatrixHttpApiTest.php
index ef4d7ba..38f9f4b 100644
--- a/tests/MatrixHttpApiTest.php
+++ b/tests/MatrixHttpApiTest.php
@@ -51,7 +51,8 @@ class MatrixHttpApiTest extends BaseTestCase {
      */
     protected $api;
 
-    protected function setUp() {
+    protected function setUp(): void 
+    {
         parent::setUp();
         $this->api = new MatrixHttpApi('http://example.com');
     }
diff --git a/tests/UserTest.php b/tests/UserTest.php
index cbfe173..a7d98fc 100644
--- a/tests/UserTest.php
+++ b/tests/UserTest.php
@@ -26,7 +26,8 @@ class UserTest extends BaseTestCase {
      */
     protected $room;
 
-    protected function setUp() {
+    protected function setUp(): void 
+    {
         parent::setUp();
         $this->client = new MatrixClient(self::HOSTNAME);
         $this->user = new User($this->client->api(), $this->userId);