Intermittent test failure in spec/models/abuse_report_spec.rb

On Travis, the following tests fail intermittently:

https://github.com/otwcode/otwarchive/blob/3e2b125a8085ca5292014349d3d42f69f4fc75bf/spec/models/abuse_report_spec.rb#L237-L255

The test should pass reliably. No manual testing needed.