In his message, president Rouhani expressed hope that during Pashinian's tenure in office, relations between Tehran and Yerevan would expand more than ever.
He wished good health and success for the new Armenian prime minister and prosperity for the Armenian people.
59 Armenian lawmakers voted for Pashinian while 42 others voted against him on May 8 in a voting in which he gained the confidence vote of the Parliament to become the new prime minister of the country.