diff --git a/tests/py/test_billing_payday.py b/tests/py/test_billing_payday.py
index cdf4d0d584..7222d467cc 100644
--- a/tests/py/test_billing_payday.py
+++ b/tests/py/test_billing_payday.py
@@ -513,16 +513,18 @@ def test_payout_no_balanced_href_does_________what_question_mark(self):
                               balance=20)
         Payday.start().payout()
 
-    @mock.patch('gratipay.billing.payday.log')
-    @mock.patch('gratipay.billing.exchanges.thing_from_href')
-    def test_payout_can_pay_out(self, tfh, log):
-        self.make_participant('alice', claimed_time='now', is_suspicious=False,
-                              balance=20, balanced_customer_href='foo',
+    @mock.patch('gratipay.billing.payday.ach_credit')
+    def test_payout_can_pay_out(self, ach):
+        alice = self.make_participant('alice', claimed_time='now', is_suspicious=False,
+                              balanced_customer_href='foo',
                               last_ach_result='')
+        self.make_exchange('balanced-cc', 20, 0, alice)
         self.make_team(owner='alice', is_approved=True)
         Payday.start().payout()
-        log.assert_any_call('Crediting alice 2000 cents ($20.00 - $0.00 fee = $20.00) on Balanced '
-                            '... succeeded.')
+
+        assert ach.call_count == 1
+        assert ach.call_args_list[0][1].id == alice.id
+        assert ach.call_args_list[0][2] == 0
 
     @mock.patch('gratipay.billing.payday.log')
     def test_payout_skips_unreviewed(self, log):