diff --git a/tests/src/Functional/SettingsFormTest.php b/tests/src/Functional/SettingsFormTest.php
index 9b3ce99..411195f 100644
--- a/tests/src/Functional/SettingsFormTest.php
+++ b/tests/src/Functional/SettingsFormTest.php
@@ -24,7 +24,7 @@ class SettingsPageTest extends BrowserTestBase {
   /**
    * {@inheritdoc}
    */
-  protected function setUp() {
+  protected function setUp(): void {
     parent::setUp();
   }