When you have followed a link from courses.html to another page, instead of using a link to go back to courses.html, you can us the .back() method.
You'll want to test all of the links in the header.
After you followed a link to another page, you were testing the title of the page but you used this.getTitle(). This test will never fail. When testing the page title, you should provide a string for the expected title.
2nd pull request without merging