Test window should be a range usually 20 days apart. If he received the test invite e-mail on Jan 23, it should be after that. So do you mean Feb 16?
Check your spam and deleted e-mail directory to see if you received this test invite e-mail coming from "cic.gc.ca". It's unusual that one applicant in a family gets a test invite and the other does not... I would call IRCC and let them know you did not get a tracker update or e-mail while your spouse got one...
If they say that you have been invited and your e-mail is lost and the tracker is stuck, you can go ahead and take the test even without the e-mail at anytime within the test window here:
ttps://ct-tc.apps.cic.gc.ca/?lang=en