Status and future prospects of lepton universality tests at LHCb

The Standard Model is lepton flavour universal $i.e.$ the couplings of electroweak gauge bosons and the different lepton families are universal. However, recent measurements have shown deviations from this behavior, which could potentially be due to contribution from new physics. The lepton flavour universality tests done at the LHCb experiment using tree-level and rare $B$ decays are presented.