diff --git a/core/modules/book/src/Tests/BookTest.php b/core/modules/book/src/Tests/BookTest.php
index 532a082..a3401a7 100644
--- a/core/modules/book/src/Tests/BookTest.php
+++ b/core/modules/book/src/Tests/BookTest.php
@@ -463,8 +463,8 @@ function testBookDelete() {
      $this->drupalGet($this->book->urlInfo('delete-form'));
      $this->assertRaw(t('%title is part of a book outline, and has associated child pages. If you proceed with deletion, the child pages will be relocated automatically.', ['%title' => $this->book->label()]));
      // Delete parent, and visit a child page.
-     $this->drupalPostForm('node/' . $this->book->id() . '/delete', [], t('Delete'));
-     $this->drupalGet('node/' . $nodes[0]->id());
+     $this->drupalPostForm($this->book->urlInfo('delete-form'), [], t('Delete'));
+     $this->drupalGet($nodes[0]->urlInfo());
      $this->assertResponse(200);
      $this->assertText($nodes[0]->label());
    }