Mold inspection and mold testing are often confused, but they don’t do the same job. A mold test analyzes a sample. A mold inspection should help locate where the problem may be coming from. That difference matters when mold is hidden behind walls, under floors, inside cabinets, or in HVAC-related areas. This guide explains how visual inspections, air testing, swab testing, and mold dog inspections compare, where each method can help, and why testing alone doesn’t always tell homeowners where mold is growing. If your test results didn’t explain the problem, source location may be the missing piece.