diff --git a/tests/src/Functional/LoadTest.php b/tests/src/Functional/LoadTest.php
index dd25cb0..5510ad9 100755
--- a/tests/src/Functional/LoadTest.php
+++ b/tests/src/Functional/LoadTest.php
@@ -29,7 +29,7 @@ class LoadTest extends BrowserTestBase {
   /**
    * {@inheritdoc}
    */
-  protected function setUp() {
+  protected function setUp(): void {
     parent::setUp();
     $this->user = $this->drupalCreateUser(['administer site configuration', 'administer blocks']);
     $this->drupalLogin($this->user);