spec: fix sporadic failure

this *should* work with once-ler (it even has a spec for it), but this
fails on jenkins fairly regularly. un-once-ler-ifying until i can figure
it out

Change-Id: I487600031fc9320bacd04d479e93b7680579b194
Reviewed-on: https://gerrit.instructure.com/38798
Tested-by: Jenkins <jenkins@instructure.com>
Reviewed-by: Bryan Madsen <bryan@instructure.com>
Product-Review: Bryan Madsen <bryan@instructure.com>
QA-Review: Bryan Madsen <bryan@instructure.com>