testantur
testantur is a Latin form of testor, meaning “call to witness; testify, declare”. It is the 3rd person plural present passive indicative.
Found 31 times in the Latin texts on Socratos.
Where it is used
Cicero, De Natura Deorum 2.138: … utraeque autem crebrae multaeque toto corpore intextae vim quandam incredibilem artificiosi operis divinique testantur.
All forms of testor (conjugation table)
Source: Socratos (socratos.org), a free reader for Ancient Greek and Latin. Grammar from the Perseus Treebank and Morpheus; dictionary entries from Lewis & Short, A Latin Dictionary (Perseus Digital Library, CC BY-SA). Counts are from the texts on Socratos.