Can you submerge it in water so see if it leaks? Cement mixing tub, Nearby pond, Wife's bathtub? (It is her tire
)
I'd mount it on a weekend and go drive it myself, and barring pressure loss, monitor daily. Does it have tpms?
edit- another option, mount tire on car, cover in soap (dawn dishwashing soap or something), hose with water, look for bubbles.