testing ground
noun /ˈtestɪŋ ɡraʊnd/
/ˈtestɪŋ ɡraʊnd/
- a place or situation used for testing new ideas and methods to see if they work
- Eastern Europe has been a testing ground for rapid economic reform.
- a place used for testing machines, etc. to see if they work correctly
- a piece of land in use as a tank testing ground