Your government figured that out on their own, which was to be expected given the fact you are Germans. Government of my country tried different approaches aka no testing and when the Chinese delegation came and warned them about the probable outcome of their silly actions they did U-turn. But unlike Germany, they have to buy foreign tests.
It is silly that all it took was five minutes read back in mid-February to figure out that massive testing and case tracking is the single most important thing as seen in examples of Singapore, South Korea, Taiwan, Vietnam, China and now Germany. There was an entire Chinese protocol for Wuhan available in written form for free, a whole month ago. And Britmy old friends tried to be smarter than everybody else by adapting the theoretical model for flu pandemic into response for COVID-19 pandemic, completely ignoring massive differences between two viruses. But that's what you get when you vote for right-wingers.
South Korea offered test kits to the USA in early Feb I believe, but they refused claiming their CDC finds those kits to produce wrong results. Now they ordered that same machine Korea has been using for testing hundreds of thousands of people all this time. In the mean time they went from just a flu, dem hoax, they have it contained to this what we today. The most amusing detail is, they will again vote for Trump administration. He will spin this hard as Chinese virus, blame everything on China and win election based on racism once again.