'Counterfeits' in the Bible

For such men are counterfeit apostles, deceitful workers, masquerading as apostles of Christ.

Test and evaluate yourselves to see whether you are in the faith and living your lives as [committed] believers. Examine yourselves [not me]! Or do you not recognize this about yourselves [by an ongoing experience] that Jesus Christ is in you—unless indeed you fail the test and are rejected as counterfeit?