Answer :
Christ never taught the Disciples outwardly about testing the Law Makers, what he did was to teach the Disciples how to properly "judge" a person which will let them know where they stand with GOD.
There are many Scriptures some are as follows.
Matthew 15:1-20
Matthew 26:23
There are many Scriptures some are as follows.
Matthew 15:1-20
Matthew 26:23