diff --git a/tests/src/FunctionalJavascript/WeightTest.php b/tests/src/FunctionalJavascript/WeightTest.php
index c4e8d91..5e640a7 100644
--- a/tests/src/FunctionalJavascript/WeightTest.php
+++ b/tests/src/FunctionalJavascript/WeightTest.php
@@ -80,7 +80,7 @@ class WeightTest extends WebDriverTestBase {
   /**
    * {@inheritdoc}
    */
-  public function setUp() {
+  public function setUp(): void {
     parent::setUp();
 
     $this->adminUser = $this->drupalCreateUser(