  The $Om3$ diagnostic (Shafieloo et al. 2012) tests the consistency of the
cosmological constant as a candidate for dark energy using Baryon Acoustic
Oscillation (BAO) data. An important feature of $Om3$ is that it is independent
of any parametric assumption for dark energy, neither does it depend upon the
dynamics of the Universe during the pre-recombination nor post-recombination
eras. In other words, $Om3$ can be estimated using BAO observables and used
either to confirm or falsify the cosmological constant independently of the
value of the Hubble constant $H_0$ (expansion rate at $z=0$), and the comoving
sound horizon at the baryon drag epoch, $r_d$ (which is a function of the
physics of the Universe prior to recombination). Consequently, $Om3$ can play a
key role in identifying the nature of dark energy (DE) regardless of the
existing tensions in the standard model of cosmology and the possible presence
of systematics in some of the data sets. We revisit $Om3$ using the most recent
BAO observables from the eBOSS survey in order to test the consistency of the
cosmological constant with this data. Our results show the consistency of dark
energy being the cosmological constant. Moreover, with eBOSS data, we have
achieved a precision of $1.5\%$ for this three-point diagnostic. This
demonstrates that $Om3$ can be a potent diagnostic of dark energy when used in
conjunction with the high precision data expected from forthcoming large scale
structure surveys such as the Dark Energy Spectroscopic Instrument (DESI) and
Euclid.
