diff -u b/core/modules/node/tests/src/Functional/NodeTitleTest.php b/core/modules/node/tests/src/Functional/NodeTitleTest.php
--- b/core/modules/node/tests/src/Functional/NodeTitleTest.php
+++ b/core/modules/node/tests/src/Functional/NodeTitleTest.php
@@ -83,7 +83,7 @@
     $node = $this->drupalCreateNode($settings);
     // Test that 0 appears as <title>.
     $this->drupalGet('node/' . $node->id());
-    $this->assertTitle(0 . ' | Drupal');
+    $this->assertTitle('0 | Drupal');
     // Test that 0 appears in the template <h1>.
     $xpath = '//h1';
     $this->assertSame('0', $this->xpath($xpath)[0]->getText(), 'Node title is displayed as 0.');