probatory

/ˈproʊbəˌtɔri/
adjective
  1. Relating to or serving as a test, trial, or examination; designed to test or prove something.
    • The judge admitted the probatory evidence to help determine the truth of the case.
    • The scientist conducted a probatory experiment to see if the chemical reaction would occur.
    • The new employee's probatory period lasts three months before she gets full benefits.