diff --git a/spec/lib/reports/sales_tax_totals_by_order_spec.rb b/spec/lib/reports/sales_tax_totals_by_order_spec.rb
index 7987ddad0b..0e6be04375 100644
--- a/spec/lib/reports/sales_tax_totals_by_order_spec.rb
+++ b/spec/lib/reports/sales_tax_totals_by_order_spec.rb
@@ -145,7 +145,7 @@ RSpec.describe "Reporting::Reports::SalesTax::SalesTaxTotalsByOrder" do
         total = report.total_excl_tax(query_row)
 
         # discounted order total - discounted order tax
-        expect(total).to eq((113.3 - 10) - (3.3 - 0.29))
+        expect(total).to eq((BigDecimal('113.3') - 10) - (BigDecimal('3.3') - BigDecimal('0.29')))
       end
     end
   end