Note You will need to use a screen reader to perform these tests. Single dialogue Log in as admin Create a course Under "Description" in "course summary files" click on the left icon to open the file picker window Enable the screen reader Navigate around the dialogue using the screen reader and confirm that the screen reader's focus doesn't shift to the background content outside the dialogue popup Note: Don't use "tab" to navigate the dialogue because there is javascript code there to specifically catch that key press and lock it to the dialogue. Use any other navigation options available to the screen reader. Close the dialogue Confirm that you can now navigate the main page (after the dialogue has been closed) using the screen reader Multiple dialogue (iframe) Log in as admin Create a course Under "Description" in "course summary" click on the far right icon to open the manage files iframe window In the manage files popup click the left icon to open the file picker dialogue Enable the screen reader Navigate around the dialogue using the screen reader and confirm that the screen reader's focus stays within the "manage files" iframe, which includes the file picker popup. You should be able to navigate through the file picker popup but only into the "manage files" header (to close it, for example) but not into the background document body. Note: Don't use "tab" to navigate the dialogue because there is javascript code there to specifically catch that key press and lock it to the dialogue. Use any other navigation options available to the screen reader. Close both dialogues Confirm that you can now navigate the main page (after the dialogue has been closed) using the screen reader Multiple dialogue Log in as admin Create a course Under "Description" in "course summary files" click on the left icon to open the file picker window Select the wikipedia option and search for an image In the search results, click on one of the images to bring up the preview popup Enable the screen reader Navigate around the preview popup using the screen reader and confirm that the screen reader's focus doesn't shift to the background content outside the preview popup Note: Don't use "tab" to navigate the dialogue because there is javascript code there to specifically catch that key press and lock it to the dialogue. Use any other navigation options available to the screen reader. Close the image preview dialogue and confirm that the screen readers focus is now locked to the file picker dialogue. Close the file picker Confirm that you can now navigate the main page (after the dialogue has been closed) using the screen reader