Patrick Peter (Institut d'Astrophysique de Paris) Title: Using cosmology to test modifications of quantum mechanics. Abstract: Although some argue that, in a given interpretative framework, there is no measurement problem in quantum physics, others don't agree and suggest instead different means of producing an actual classically measurable value for a given experimental setup. In cosmology, it is assumed that the initial perturbations from which large scale structures originated result from all scale quantum vacuum fluctuations of the inflaton field, later to be somehow classicalized in order to source Einstein equations and actually form large scale structures. I will discuss the problem itself and two proposed solutions based on modifications or extension of the Schrödinger equation; these theories can, in principle and hopefully in the future experimentally be discriminated by their predictions.