Can a bequest be made to a witness or spouse of a witness?

The Succession Law Reform Act of Ontario provides that a bequest to a witness or spouse of a witness is void, unless the Court is satisfied that neither the witness nor the spouse exercised any improper or undue influence upon the testator. Where a beneficiary or a spouse of a beneficiary witnesses the Will, the Court can require the beneficiary or the spouse to satisfy the Court that the beneficiary or spouse did not unduly influence the testator