Can the will be challenged in court?

According to Part 2 of Article 1257 of the Civil Code of Ukraine, a will can be challenged and declared invalid at the request of an interested person. The law does not explicitly define who belongs to this category, however, according to judicial practice, an interested person can only be recognized as a person whose subjective inheritance rights have been violated in connection with the execution of a will, namely: an heir by law (children of a deceased person, his husband or wife, parents, other relatives provided for by law), an heir under another will (any person who was designated as an heir in other wills), and a person in whose favor a testamentary refusal was made).