I received my test/interview invite from IRCC/Calgary this morning (Mon.). I'm a Nov.2017 applicant.Please note that there barely have been any test invites at all for any location in the most recent weeks. There is most likely a very easy explanation for this: Due to summer vacations, the offices are short-staffed. Plus, there don't seem to be a lot of tests in August anyways, so even if you were invited now, the test would be in September.