  In this contribution, the classical tests of general relativity using the
Gutsunaev-Manko metric with slow rotation are obtained. This metric represents
the spacetime of an object endowed with mass, magnetic dipole moment and
angular moment. These tests are the deflection of light, time delay, precession
of the periastron and gravitational redshift. We also provide numerical
estimations for real magnetars and magnetar candidates from the McGill magnetar
catalogue, and for the Sun in the cycles of low activity. Our results find that
the magnetic dipole contribution to the deflection of light is significant when
compared to the rotation contribution. The magnetic dipole contributions to the
periastron precession and the time delay are 3 and 6 orders of magnitude lower
than the rotation contribution respectively. For the gravitational redshift,
the contribution is negligible within the approximation presented.
