  We performed a simulation on the DUNE experiment to probe the capability of
future neutrino long-baseline experiments' ability to constrain the parameter
space of high-energy models by using the correlation between the atmospheric
and reactor mixing angles. As an example, we took the Tetrahedral Flavour
Symmetry model, which predicts a strong relation between the non-zero value of
$\theta_{13}$ and deviation of $\theta_{23}$ from the maximality. We show that
in this case, the model can realistically be excluded in more than $3\sigma$
for most of the parameter space. We also study the octant degeneracy at DUNE
and its impact on the sensitivity of such models.
