put to the proof

To be tested, or to test something. I'm hopeful that the invention will now finally work properly, but it needs to be put to the proof first.

Name	Pronounced	Usage
Linnaea	li-NAY-ə	English (Rare)
LuminiȚA	loo-mee-NEE-tsah	Romanian
Iuvenalis	-	Ancient Roman
Waldo	WAWL-do (English)	English, German, Ancient Germanic
Geneva	[dʒi'ni:və]
Guntram	GUWNT-rahm	German