certificate of having passed an examination
• (n.) A certificate of merit or proficiency; -- so called from the Latin words, Ita testamur, with which it commences.
Tes·ta'mur noun [ Latin , we testify, from testari to testify.] (Eng. Universities) A certificate of merit or proficiency; -- so called from the Latin words, Ita testamur , with which it commences. 
testamur English university certificate; from Latin testamur, 'we attest, testify'; from testari; so called from the word testamur used in the text of the certificate.