Ratio of M _BH/M _* vs. redshift for the VIPERS sample of AGN dwarf galaxies at z < 1 of Mezcua et al. (2023), the new VIPERS “cosmic noon” sample of AGN in low-mass galaxies reported here, and a compilation of JWST AGN in low-mass galaxies at z > 4. We show for comparison the nonevolution found by Suh et al. (2020) for z ∼ 0–2.5 (black line, 1σ scatter∼0.5 dex), Sun et al. (2015) for z ∼ 0–2 (brown line), and Setoguchi et al. (2021) for z ∼ 1.2–1.7 (red line), and the z-evolution found by Decarli et al. (2010) for z ∼ 0–3 (dashed blue line), Trakhtenbrot & Netzer (2010) for z ∼ 0.1–2 (dashed yellow line), Bennert et al. (2011) for z ∼ 1–2 (dashed green line, including the data of Merloni et al. 2010), and Pacucci & Loeb (2024) for the JWST z > 4 population of overmassive BHs (dashed purple line). We note that the Suh+2020 sample is the only one for which the BH and stellar masses have been computed using the same procedure and parameters as the VIPERS samples.