un ‧ tested /ʌnˈtestəd, ʌnˈtestɪd/ BrE AmE adjective
1 . untested ideas, methods, or people have not been used in a particular situation so you do not know what they are like:
an argument based on untested assumptions
2 . an untested drug, medical treatment etc has not been given any scientific tests to discover if it is safe to use