fix test (substring, broken in 7fd6bc8)
fix test (substring, broken in 7fd6bc8)

hsr-ba-fs15-dat/opendatahub,hsr-ba-fs15-dat/opendatahub,hsr-ba-fs15-dat/opendatahub,hsr-ba-fs15-dat/opendatahub,hsr-ba-fs15-dat/opendatahub