I’ve edited your post for readability. When you enter a code block into a forum post, please precede it with a separate line of three backticks and follow it with a separate line of three backticks to make it easier to read.
You can also use the “preformatted text” tool in the editor (</>) to add backticks around text.
See this post to find the backtick on your keyboard. Note: Backticks (`) are not single quotes (’).
It would help if you posted a link to your live version instead, with the test script added.
Not 100% sure if this is the issue but you are missing some quotes around some of the attribute values (alt and height on the image element) that can cascade the error down the page. You also didn’t close the ul.