Top: ground-based photometry for TOI-286, from LCO-CTIO (left), MKO (middle), and PEST (right). The orange (for planet 1) or green (for planet 2) horizontal bars indicate the timespan of the closest transit to each observation; the transit depth is too small to be seen. Note that the target star in these image sequences was intentionally either strongly exposed or saturated (causing large scatter and/or systematics) for the purpose of searching for an eclipsing binary in fainter neighbouring stars that could be the cause of the TESS detection. Bottom: ground based photometry for the close companion Gaia DR3 5482316884791610880, which clears it of being a background eclipsing binary.