diff -u b/core/tests/Drupal/Tests/Core/Entity/Controller/EntityControllerTest.php b/core/tests/Drupal/Tests/Core/Entity/Controller/EntityControllerTest.php
--- b/core/tests/Drupal/Tests/Core/Entity/Controller/EntityControllerTest.php
+++ b/core/tests/Drupal/Tests/Core/Entity/Controller/EntityControllerTest.php
@@ -107,7 +107,7 @@
   /**
    * {@inheritdoc}
    */
-  protected function setUp(): void {
+  protected function setUp() {
     $this->renderer = new MockRenderer();
 
     $this->entityTypeManager = $this->prophesize(EntityTypeManagerInterface::class);