 In 2015 three papers appeared claiming a conclusive test of Bell inequalities. The first (Hensen et al., 2015) achieved a violation of the CHSH inequality via an event-ready scheme. This experiment is based on using electronic spin associated with the nitrogen-vacancy (NV) defect in two diamond chips located in distant laboratories. In the experiment, each of these two spins is entangled with the emission time of a single photon. Then the two, indistinguishable, photons are transmitted to a remote beam splitter. A measurement is made on the photons after the beam splitter. An appropriate result of the measurement of the photons projects the spins in the two diamond chips onto a maximally entangled state, on which a Bell inequality test is realized. The high efficiency in spin measurement and the distance between the laboratories allows closure of the detection and communication loophole at the same time. However, the experiment utilized only a small number, 245, of trials, and thus the statistical significance (2 standard deviations) of the result \(S = 2.42 \pm 0.20\) is limited.