  An understanding of the dynamical evolution of binary star systems, and their
effects on stellar and planetary evolution, requires well-characterized binary
populations across stellar ages. However, the observational resources required
to find and characterize binaries are expensive. With the release of
high-precision Gaia astrometry, the re-normalized unit weight error (RUWE)
statistic has been shown to reveal the presence of binary systems, with RUWE
values greater than 1.2 indicating the presence of a stellar companion within $
\sim 1$". Our goal is to assess whether this new diagnostic, which was
developed for field-age systems ($>$1 Gyr), applies to young systems;
specifically, those that host circumstellar disks. With a control sample of
single-star systems, compiled from high-contrast imagining surveys of the
Taurus and Upper Scorpius star-forming regions, we compare the RUWE values for
systems with and without circumstellar disks. We show that the presence of a
protoplanetary disk alone can result in inflated RUWE values. Based on the
distribution of the RUWE for disk-bearing single stars, we suggest a more
conservative single-star -- binary threshold is warranted in the presence of
disk material. We place this cutoff at the distribution's 95th percentile, with
RUWE $= 2.5$.
