diff -u b/core/modules/book/src/Tests/BookTest.php b/core/modules/book/src/Tests/BookTest.php
--- b/core/modules/book/src/Tests/BookTest.php
+++ b/core/modules/book/src/Tests/BookTest.php
@@ -755,19 +755,18 @@
   /**
    * Tests the book navigation block when book is unpublished.
    *
-   * There was a fatal error with "Show block only on book pages" block mode:
-   * @see https://www.drupal.org/node/2743183
+   * There was a fatal error with "Show block only on book pages" block mode.
    */
   public function testBookNavigationBlockOnUnpublishedBook() {
     // Create a new book.
     $this->createBook();
 
     // Create administrator user.
-    $administratorUser = $this->drupalCreateUser(array('edit any book content', 'administer blocks', 'administer nodes', 'bypass node access'));
+    $administratorUser = $this->drupalCreateUser(['administer blocks', 'administer nodes', 'bypass node access']);
     $this->drupalLogin($administratorUser);
 
     // Enable the block with "Show block only on book pages" mode.
-    $this->drupalPlaceBlock('book_navigation', array('block_mode' => 'book pages'));
+    $this->drupalPlaceBlock('book_navigation', ['block_mode' => 'book pages']);
 
     // Unpublish book node.
     $edit = [];
@@ -775,7 +774,7 @@
 
     // Test node page.
     $this->drupalGet('node/' . $this->book->id());
-    $this->assertText($this->book->label(), 'Unpublished book with "Show block only on book pages" book navigaton settings.');
+    $this->assertText($this->book->label(), 'Unpublished book with "Show block only on book pages" book navigation settings.');
   }
 
 }