I received the test invite from the same e-mail which you mentioned above. I took and passed the test on Dec. 23rd so my timeline is very similar to yours; my background check is still pending. We are both still well within the normal processing time (of 12 months), and there are many people who applied *before* us who haven't gotten their test invites yet. I do not think there is any cause for concern.My citizenship test was marked complete on Dec 23rd but my background check is still in progress. Why is it taking so long