Fits to the TESS light curve of α Dra for the primary (left) and secondary (right) minima. The normalised TESS measurements (upper panels) and O-C residuals (lower panels) are shown as red symbols, while the best fit obtained with the WD code is illustrated as a blue solid line (see text for definition of Part 1 and Part 2 light curves). The phases are calculated from the ephemeris determined from the observed primary minima, T_{pr. min} = (2458696.01948 ± 0.00003)+(51.41891 ± 0.00011) E. The light curves and best fit, and the residuals, for Part 2 are arbitrarily shifted upwards for better visibility.