Merge pull request #13756 from edx/benp/flaky-textbook-tests

Stabilize textbook tests

common/test/acceptance/pages/studio/textbook_upload.py

@@ -16,7 +16,7 @@ class TextbookUploadPage(CoursePage):
     url_path = "textbooks"
 
     def is_browser_on_page(self):
-        return self.q(css='body.view-textbooks').present
+        return self.q(css='.textbooks-list').visible
 
     def open_add_textbook_form(self):
         """