Background: The Reveal Q+ MAX for Aflatoxin is a lateral flow immunochromatographic test intended for quantitative analysis within 6 min after aqueous extraction. Objective: Work was conducted to validate the performance of the Reveal Q+ MAX for Aflatoxin method in selected corn and nut matrixes. Methods: This method was validated under the requirements of the AOAC Research Institute Performance Tested MethodSM program. Five matrixes, including corn naturally contaminated with aflatoxin at 0, 5.2, 21.0, 51.6, 103.6, and 282 ppb as well as peanuts, pistachios, walnuts, and almonds spiked at 0, 5, 20, 50, and 300 ppb were analyzed. Results: Average percentage recoveries of the added aflatoxin from the matrixes ranged from 80.8 to 116.9%. Average LOD for all matrixes is 2 ppb and LOQ is 7 ppb. With the exception of sample size for almonds, robustness trials demonstrated that deliberate changes to the assay parameters minimally affected the Reveal Q+ MAX assay performance. Finally, stability results from three independently manufactured lots support Reveal Q+ MAX for Aflatoxin performance consistency and shelf-life of 18 months when stored at room temperature. Conclusions: This study appropriately validates the Performance Tested MethodSM claim for corn and selected nut matrixes on Reveal Q+ MAX for Aflatoxin, an aqueous lateral flow test kit. Highlights: Aqueous lateral flow test kit detects total aflatoxin between 80 to 120% yield with an LOD of 2 ppb.