Yusuf Test, (768, ?) was a mosaic artist in Isfahan.
Yusuf believed in Yazdanism.
Financially, he was well under average. He had struggles to meet ends every other week. He was considered as belonging to the lowest caste. However, he made some friends among it. He had a refined culture, and was known to read, and sometimes write, for pleasure. He was force of nature, and people saw in their body and beauty the incarnation of a god. He was considered strong-willed, a leader at heart.