Write one more test to check if we have exactly one tree group and it fails
Write one more test to check if we have exactly one tree group and it fails

AliTVTeam/AliTV,AliTVTeam/AliTV,BioInf-Wuerzburg/AliTV,BioInf-Wuerzburg/AliTV,BioInf-Wuerzburg/AliTV,BioInf-Wuerzburg/AliTV,BioInf-Wuerzburg/AliTV,BioInf-Wuerzburg/AliTV