Earlier, Putin ordered a comprehensive analysis of the expediency of preparing for nuclear weapons testing to be conducted by the Russian Security Council.
"The work began immediately," Shoigu said.
Russia expects the US to follow its nuclear test ban commitments. The US has not yet officially provided explanations regarding its statements on nuclear tests, Shoigu added.
Earlier, Russian President Vladimir Putin announced that Russia is prepared to continue adhering to the restrictions under New START for one year after February 5, 2026. He explained that steps to comply with the New START restrictions will be effective if the United States reciprocates. US President Donald Trump called Putin's New START proposal a good idea, according to several media reports.
"We expect that Washington will continue to adhere to its commitments regarding the ban on nuclear tests," Shoigu said.
In late October, US President Donald Trump said he had ordered nuclear weapons tests to be conducted "on an equal basis" with other countries that allegedly have nuclear testing program.