Mass-mass diagram illustrating current tests of general relativity with the double pulsar. Our improved measurement of pulsar B’s spin-precession rate () is given by the (mostly) vertical blue lines where the separation between them indicates the 68% uncertainty. Other individual constraints on the masses of pulsar A and B from Kramer et al. (2006, 2021a) are shown by pairs of lines. These include the periastron precession rate (), shrinking of the orbital period due to gravitational radiation (Ṗ_b), gravitational redshift (γ), Shapiro delay range (r) and shape (s), and the mass-ratio (R). The shaded region is forbidden by the individual mass functions of the two pulsars (i.e. sin i ≤ 1).