Purity test (disambiguation)
A purity test is a self-graded survey assessing one's participation in vices. Purity test may also refer to:

 Purity test (politics), a standard used to determine in-group and out-group
 Metallurgical assay, the process of testing the purity of a metal
 Seed testing, the percentage of seed described on the label that is actually found in the quantity of seed