Late-time linear decay slope in V and r band versus Δm₁₅ for the CSP-I SE SNe with both their peak luminosity covered and their last observation being >+40 d days post maximum. Faster declining light curves (higher Δm₁₅) tend to decline faster at late phases. Objects with both large uncertainties on the slope and on Δm₁₅ are excluded from the figure. SN IIb, Ib, Ic, and Ic-BL are represented in green, blue, red, and magenta, respectively. SN 2005em is not included and falls far from the correlation due to its large late-time slope. With gray points we represent the results for the SNe Ia fit by Contardo (2001), which do not show any clear trend.