Having trouble with Skype on my new PC can not hear myself on testing service.

Hello all I have just joined up I am from NZ and have encountered my first problem with Skype as follows:

Having just moved from desk top Vista to DELL 15 5593 Lap Top with W10.

Having tested microphone on PC it says cannot detect any fault. I have checked on speaker and microphone settings and they are set OK for volume.
When running Skype I check on audio settings and both inbuilt and external microphones show as working but on doing Skype test I receive skypes voice but not my voice via any of the two microphones which leads me to suspect the fault may lay with skype settings, if I have missed something please advise.