Los Paisanos Test Only in Riverside, CA is Test Only smog center offering all DMV Smog checks for all vehicles, Smog Check Certification, Smog Inspection, Test Only Smog, Diesel Smog Check, Smog Testing for DMV Renewal, Gross Polluter Certification, Riverside smog checks and smog Coupon.. DMV Smog checks for all vehicles,Smog Check Certification,Smog Inspection,Test Only Smog,Diesel Smog Check,Smog Testing for DMV Renewal,Gross Polluter Certification