Prostoptestonly is a trending test only smog station that is fast becoming a popular choice in San Bernardino, Walnut and the entire California. This is because of our unique and innovative smog inspection services. In compliance to the California State smog check program we are committed and determined to ensuring an environmentally friendly and pollution-free State by delivering high quality biennial smog test services. As a test only station, we are specialized at rendering only smog test services and nothing more. We are bilingual hence capable of helping clients from different nationalities. We have highly skilled technicians and courteous staffs.