Improve error messages for old reading tests.
Improve error messages for old reading tests.

pvtodorov/indra,johnbachman/belpy,johnbachman/indra,pvtodorov/indra,sorgerlab/belpy,bgyori/indra,pvtodorov/indra,sorgerlab/belpy,johnbachman/indra,pvtodorov/indra,bgyori/indra,johnbachman/belpy,johnbachman/belpy,sorgerlab/indra,sorgerlab/indra,johnbachman/indra,sorgerlab/indra,sorgerlab/belpy,bgyori/indra