Alternative spelling of time-tested

The Rorschach test.

(idiomatic) To explore or probe, as before making a commitment.

Any chemical check for the presence of (usually illegal) drugs in a sample of one's blood, hair or urine.

(transitive) To perform a drug test; the check for the presence of illegal drugs in a sample of blood, hair or urine.

(idiomatic) To test something or someone; to evaluate, scrutinize or explore by testing or experimentation.

fluorine dating

To take a motor vehicle on the road to assess its quality before purchase. / (figuratively) To make a preliminary assessment of something through its use.

A sample driving session in a motor vehicle, in order to assess its quality before purchase. / (figuratively) Any preliminary assessment of something through use.

(chemistry) A simple test for the acidity or alkalinity of a substance, using litmus paper.