Stellar mass cumulative distributions of our GRB host sample, compared to the host galaxies of unbiased GRB samples (SHOALS and BAT6). Two bins of redshift are distinguished: with GRB hosts at 1 < z < 2 (top panel) and with objects at 2 < z < 3.1 (bottom panel). Upper limits are represented as arrows at the top of the plots. The 1σ uncertainty on the cumulative distribution is given by the shaded region around the curve. The p-value returned by the two-sided K–S test is provided in the right bottom part of both panels and color-coded according to the unbiased sample selected to compute the test. The vertical dashed line symbolizes the stellar mass completeness limit of the 3D-HST survey.