Fix test
Fix test

My bad. But look at our test coverage, eh?

leftees/trade-tariff-backend,leftees/trade-tariff-backend,alphagov/trade-tariff-backend,bitzesty/trade-tariff-backend,alphagov/trade-tariff-backend,leftees/trade-tariff-backend,bitzesty/trade-tariff-backend,alphagov/trade-tariff-backend,bitzesty/trade-tariff-backend