"We expect the plane to take to the skies no later than the end of this year," Sergei Ivanov told a news conference after a meeting of the Military-Industrial Commission.
Earlier plans set 2010 for the first tests of the new fighter, which will feature high maneuverability and stealth to ensure air superiority and precision in destroying ground and sea targets.
Russia's advanced multirole fighter is being developed by Sukhoi, which is part of Russia's United Aircraft Corporation (UAC), along with India's Hindustan Aeronautics Limited (HAL), under a preliminary intergovernmental agreement signed in October 2007.
Russia and India will simultaneously develop two versions of the combat aircraft - a two-seat version to meet the requirements of India's air superiority doctrine, and a single-seat version for the Russian Air Force.
The Russian version will be built at the Komsomolsk-on-Amur aircraft-manufacturing plant in Russia's Far East.
Ivanov said the plant had almost completed the construction of a first prototype of the fifth-generation fighter, but it will undergo only durability tests on the ground at a research facility in Zhukovsky near Moscow.
However, a second prototype will be built and will take to the skies by the end of this year, he said.
Ivanov also said on Wednesday that the aircraft manufacturing industry should review and adjust some testing programs and methods due to advanced nature of the new aircraft.
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The main event of the third day of the 11th meeting of the Valdai International Discussion Club in Sochi was the closing session with President Vladimir Putin. The atmosphere was calm and open, despite the current political tensions and the Russia-West confrontation. The Russian president said that it corresponded to the spirit of the Valdai Club.