CTest verbose flag not being passed through to Tester

I'm not clear if this is by design or whether it's a bug but the Tester executable that is called by ctest to run the tests has a verbose flag -v.

However, when running ctest -V, the verbose flag is not passed through to the Tester executable. The verbose output shown is from the CTest framework itself but no verbose output is shown from the tester code unless it is run directly (manually) and the -v flag is specified.