Wago’s pull test

Hi all.

I've been using wago’s for a couple of years now and more recently the 221 series mainly on lighting circuits. As I do with all terminations, I do a gentle ‘pull test’ after connection which was drummed into me from apprenticeship days to check if the wire is securely held. I also do this with the wago’s but on occasion find that the wire will pull back slightly but not pull out. It can then be pushed forward again fully up into the terminal. I find that this happens more with solid conductors rather than stranded or flex. My query is, am I damaging the internal workings of the wago by carrying out this pull test? I like the reassurance of a pull test on terminations but should it be given a miss on wago’s?


thanks in advance