QCD tests of heavy flavor production associated with photons at CDF We report on tests of QCD in events containing a photon and a heavy flavor jet in data taken by the CDF experiment at the Fermilab Tevatron collider. We measure the cross-section for events containing bottom quarks and charm quarks, separately and as a ratio, and compare our results to QCD predictions as a function of photon transverse energy and invariant mass of the system.