Notes for the tester Note 1: When developing this, I was often experimenting the "OAuth 1.0 error: We did not obtain the request token - the service provider may be temporarily down." error when I was trying to access the Flickr API for the first time. This is a result of the "Bad, bad panda" error page returned by Flickr instead of the expected OAuth response token and it is very random. Just keep clicking the repository link (or reloading/reposting the page) and it starts working after couple of attempts :-/ I suspect that to be a Flickr/Yahoo side issue - and others seem to conclude the same . Note 2: The repository search feature does not seem to work well: I never got a result when trying to search for something. But I am confident we do our side right and it is the Flickr side not handling the search "text" argument well (see https://www.flickr.com/services/api/flickr.photos.search.html ). Note 3: Adding photos into photosets (albums) during portfolio export does not seem to work. But again, all the API call and their response seems correct, just the photo is not added. Note 4: As a result of this patch, it is actually no longer needed to set up callback URLs in Flickr. So you may leave that field empty and use the same API key and secret for both repository and portfolio plugins. Tests Check that the Flickr repository works again, allowing the user to authorize the Moodle site to access their photos. Check that the Flickr portfolio works again, allowing the user to authorize the Moodle site to upload photos to Flickr