HSK or Hanyu Shuiping Kaoshi is the PRC's official Chinese language proficiency test for non-native speakers of Standard Chinese. Hanban has published a mappping between the six HSK levels and the six levels of the CEFR. For example, they claim that HSK 4 corresponds to CEFR level B2 and that HSK 6 corresponds to CEFR level C2.
However, as the "Fachverband Chinesisch" of the German-speaking countries has pointed out, this mapping is erroneous. HSK4 actually corresponds (roughly) to CEFR level A2 and HSK 6 corresponds only with B2.
Hence, my question: are there any proficiency tests for Standard Chinese that go beyond CEFR B2 and that cover at least level C1?