Drug tests are not specific to metabolites only from scheduled sources. Because unscheduled cannabidiols trigger drug tests the same way as scheduled ones, they

Drug tests are not specific to metabolites only from scheduled sources. Because unscheduled cannabidiols trigger drug tests the same way as scheduled ones, they are ineffective at identifying illegal use. And yes, this gets challenged frequently since there's a legal concentration of ∆9 for products sold in the US naturally derived from hemp. Generally, if you weren't caught in possession of something scheduled, not admitting to use when presented with a "positive" drug test is enough to have it dismissed.