diff --git a/core/modules/comment/lib/Drupal/comment/Tests/CommentBookTest.php b/core/modules/comment/lib/Drupal/comment/Tests/CommentBookTest.php
new file mode 100644
index 0000000..4d92e9d
--- /dev/null
+++ b/core/modules/comment/lib/Drupal/comment/Tests/CommentBookTest.php
@@ -0,0 +1,84 @@
+<?php
+
+/**
+ * @file
+ * Contains \Drupal\comment\Tests\CommentBookTest.
+ */
+
+namespace Drupal\comment\Tests;
+
+use Drupal\comment\CommentInterface;
+use Drupal\simpletest\WebTestBase;
+
+/**
+ * Tests the comment module integration for book module.
+ */
+class CommentBookTest extends WebTestBase {
+
+  /**
+   * Modules to enable.
+   *
+   * @var array
+   */
+  public static $modules = array('book', 'comment');
+
+  public static function getInfo() {
+    return array(
+      'name' => 'Book commenting',
+      'description' => 'Test visibility of comments on book pages.',
+      'group' => 'Book',
+    );
+  }
+
+  function setUp() {
+    parent::setUp();
+
+    // Create comment field on book.
+    \Drupal::service('comment.manager')->addDefaultField('node', 'book');
+  }
+
+  /**
+   * Tests comments in book export.
+   */
+  public function testBookCommentPrint() {
+    $book_node = entity_create('node', array(
+      'type' => 'book',
+      'title' => 'Book title',
+      'body' => 'Book body',
+    ));
+    $book_node->book['bid'] = 'new';
+    $book_node->save();
+
+    $comment_subject = $this->randomName(8);
+    $comment_body = $this->randomName(8);
+    $comment = entity_create('comment', array(
+      'subject' => $comment_subject,
+      'comment_body' => $comment_body,
+      'entity_id' => $book_node->id(),
+      'entity_type' => 'node',
+      'field_name' => 'comment',
+      'status' => CommentInterface::PUBLISHED,
+    ));
+    $comment->save();
+
+    $commenting_user = $this->drupalCreateUser(array('access printer-friendly version', 'access comments', 'post comments'));
+    $this->drupalLogin($commenting_user);
+
+    $this->drupalGet('node/' . $book_node->id());
+
+    $this->assertText($comment_subject, 'Comment subject found');
+    $this->assertText($comment_body, 'Comment body found');
+    $this->assertText(t('Add new comment'), 'Comment form found');
+    $this->assertField('subject', 'Comment form subject found');
+
+    $this->drupalGet('book/export/html/' . $book_node->id());
+
+    $this->assertText(t('Comments'), 'Comment thread found');
+    $this->assertText($comment_subject, 'Comment subject found');
+    $this->assertText($comment_body, 'Comment body found');
+
+    $this->assertNoText(t('Add new comment'), 'Comment form not found');
+    $this->assertNoField('subject', 'Comment form subject not found');
+  }
+
+}