From the US, UK, and European News it is clear they are expecting Russian Nuclear tests, why would they be expecting Russian Nuclear tests other than because they are expecting a response?
uk.news.yahoo.com
www.presstv.ir
eurasiantimes.com
news.yahoo.com
‘Highly likely' Putin will conduct nuclear test to show off new technology
NATO has reportedly warned members Russia is set to carry out a test on Ukraine's border.

Kremlin rejects UK report Russia preparing to carry out nuclear test on Ukraine's border
The Kremlin has rejected a British media report that Russia was preparing to carry out a nuclear test on Ukraine


Russia To Test ‘Nuke Drone’ – Poseidon UUV From Its Gigantic Belgorod Nuclear Submarine – Italian Media
Russia's 'Belgorod' submarine that recently became operational will undertake the first-ever test of Russia's Poseidon nuclear torpedoes

NATO fears Russia preparing to test Poseidon nuclear torpedo for the first time
NATO fears that Russia may be readying to test its Poseidon nuclear-tipped torpedo, often referred to as a "doomsday weapon," for the first time, the Italian publication La Repubblica reported on Oct. 2.