Not pass in None kwargs to override default

gistfile1.py

def tester(paramA="Default Value"):
    if paramA is None:
       print('True')
    else: 
       print('False')
       
def foo(**kwargs):
  tester(kwargs.get('paramA'))

foo(paramA=None) ## True


## I cannot over write the default value but need to pass in the kwarg when it is not None. How?
## only option I can think of is this, which is horrible
# if kwargs.get('paramA')) == None:
  #  tester()
# else:
 #    tester(kwargs.get('paramA'))