  We construct a family of simple single-field inflation models consistent with
Planck / BICEP Keck bounds which have a parametrically small tensor amplitude
and no running of the scalar spectral index. The construction consists of a
constant-roll hilltop inflaton potential with the end of inflation left as a
free parameter induced by higher-order operators which become dominant late in
inflation. This construction directly demonstrates that there is no lower bound
on the tensor/scalar ratio for simple single-field inflation models.
