Temporal evolution of the osculating eccentricity e(t) for a single 3 M_E embryo in four distinct simulation setups. In the first two setups we neglect pebble accretion and the initial eccentricity is e₀ = 0 (blue curve) and e₀ = 0.05 (purple curve). In the other two setups, we consider pebble accretion and heating, the initial eccentricity being again e₀ = 0 (red curve) and e₀ = 0.05 (orange curve). Accretion heating reduces the eccentricity damping efficiency for the eccentric orbit and excites the eccentricity of the circular orbit.