The phrase "credibility test" refers to a way to determine if someone or something is believable or trustworthy. It is a method used to evaluate if the information or claims provided are reliable and can be trusted. Full definition
Especially with statements like this «The Paris Agreement's credibility test starts today», wink, wink. (m4gw.com)
If the 2018 budget fails basic credibility tests then the Finance Minister's future will continue to be at risk. (3dpolicy.ca)
«The Paris Agreement's credibility test starts today,» said Tracy Carty of the charity Oxfam, adding that governments should raise their ambitions. (m4gw.com)