diff --git a/test/integration/eis_billing/payment_status_test.rb b/test/integration/eis_billing/payment_status_test.rb
new file mode 100644
index 000000000..69c50e120
--- /dev/null
+++ b/test/integration/eis_billing/payment_status_test.rb
@@ -0,0 +1,32 @@
+require 'test_helper'
+
+class PaymentStatusTest < ApplicationIntegrationTest
+  setup do
+    sign_in users(:api_bestnames)
+    @invoice = invoices(:one)
+    @unpaid = invoices(:unpaid)
+    @registrar = registrars(:bestnames)
+    Spy.on_instance_method(EisBilling::BaseController, :authorized).and_return(true)
+  end
+
+  def shoudl_update_buyer_balance
+    assert @invoice.paid?
+    assert_equal @invoice.buyer.balance.to_f, 100.0
+
+    payload = {
+      payment_state: 'settled',
+      order_reference: @unpaid.number,
+      standing_amount: @unpaid.total,
+      transaction_time: Time.zone.now,
+    }
+
+    put eis_billing_payment_status_path, params: payload
+
+    @invoice.reload
+    @invoice.buyer.reload
+    @registrar.reload
+
+    assert @invoice.paid?
+    assert_equal @invoice.buyer.balance.to_f, 100.0
+  end
+end