Syria was bombed. Why didn't Russian S400 intercept it?

We can confirm that Russia intercepted the missile attacks of the United States, Britain and France with S400. Moreover, Russia's existing air defense systems, including anti-missile and electronic jamming systems, will take advantage of this rare opportunity to conduct actual combat tests in order to improve them and make them have better operational effectiveness.

However, due to the air strikes against Syria by the United States, Britain and France, if Russia intercepts it in an all-round way, it may be regarded as a military confrontation by the United States, Britain and France, triggering its military retaliation and even war. The United States, Britain and France will also increase their crackdown on Syria, which is very unfavorable to Russia and Syria. Therefore, Russia's anti-missile hard kill and soft jamming should be limited to a small number of technical tests and will not completely intercept missiles launched by the United States, Britain and France. Russia will also keep the test results and collected data strictly confidential, and it is difficult for the outside world to know its true level.