In obsolete|lang=en terms the difference between teston and testor
is that teston is (obsolete) a tester; a sixpence while testor is (obsolete) a teston, a sixpence.
As nouns the difference between teston and testor
is that teston is (obsolete) a tester; a sixpence while testor is (obsolete) a teston, a sixpence.
testor
English
Noun
(obsolete) A teston, a sixpence
References
* 1949', John Dover Wilson (compiler), ' Life in Shakespeare's England. A Book of Elizabethan Prose , Cambridge at the University Press. 1st ed. 1911, 2nd ed. 1913, 8th reprint. In Glossary and Notes