diff --git a/spec/enterprise/services/enterprise/billing/currencies_spec.rb b/spec/enterprise/services/enterprise/billing/currencies_spec.rb
new file mode 100644
index 000000000..f1c048b90
--- /dev/null
+++ b/spec/enterprise/services/enterprise/billing/currencies_spec.rb
@@ -0,0 +1,32 @@
+require 'rails_helper'
+
+describe Enterprise::Billing::Currencies do
+  describe 'Brazilian Real (brl)' do
+    it 'is a supported currency' do
+      expect(described_class.supported?('brl')).to be(true)
+    end
+
+    it 'recognizes brl regardless of casing or surrounding whitespace' do
+      expect(described_class.supported?('  BRL ')).to be(true)
+      expect(described_class.normalize('  BRL ')).to eq('brl')
+    end
+
+    it 'keeps brl when coercing to a supported code' do
+      expect(described_class.to_supported('BRL')).to eq('brl')
+    end
+
+    it 'defaults the pt_BR account locale to brl' do
+      expect(described_class.for_locale('pt_BR')).to eq('brl')
+    end
+
+    it 'maps brl to Brazil and the pt-BR checkout locale' do
+      expect(described_class.country_for('brl')).to eq('BR')
+      expect(described_class.preferred_locale_for('brl')).to eq('pt-BR')
+    end
+
+    it 'falls back to the usd default for unsupported input' do
+      expect(described_class.to_supported('eur')).to eq('usd')
+      expect(described_class.country_for('eur')).to eq('US')
+    end
+  end
+end