  Standard cosmology is constructed upon the (generally implicit) assumption of
the ``large scale'' homogeneity of our Universe. Now, structures are observed
at scales which become larger and larger as the observational distances
increase. However, the homogeneous Friedmann-Lemaitre-Robertson-Walker model
remains a cosmological paradigm, and Friedmannian relations are usually used to
work out the model, implicitly assuming that the homogeneity assumption is
valid at the studied scales. This has been the way the concordance (Lambda-CDM)
model came out from the analyses of the SNIa data. Since this model implies the
validity of the Friedmannian magnitude-redshift relation at the range of
redshifts spaned by the supernovae surveys, it has been proposed some years ago
a very simple test of this possible validity, provided the SNIa should be
confirmed as standard candles. Since we can hope that the redshifts of the
supernovae which will be observed in the years to come will allow such a test
to be performed, it would be interesting to find inside the SNIa community some
collaborators ready to perform the test.
