  When a light scalar field with gravitational strength interacts with matter,
the weak equivalence principle is in general violated, leading for instance to
a violation of the universality of free fall. This has been known and tested
for a while. However, recent developments [Minazzoli & Hees, PRD 2016] showed
that a novel manifestation of the universality of free fall can appear in some
models. Here we discuss this new scenario and expose how we intend to constrain
it with INPOP ephemeris.

General Relativity and Quantum Cosmology