Predictions for the tSZ power spectrum for a weak departure from self-similarity, affecting only the pressure normalization. The red solid line is the tSZ power spectrum given by the A10 pressure model, and the shaded gray region is the 1σ scatter around the best fit Shaw model with SPT data. The blue dashed line represents the A10 model with ϵ = 1.17 (Eq. (12)). The purple dotted line represents A10 model with α_z = −0.73 (Eq. (11)). Both parameters, ϵ and α_z, modify the redshift evolution of the pressure profile to reduce its amplitude at high-z.