diff --git a/hc/payments/tests/test_billing.py b/hc/payments/tests/test_billing.py
new file mode 100644
index 00000000..77e1374a
--- /dev/null
+++ b/hc/payments/tests/test_billing.py
@@ -0,0 +1,29 @@
+from django.contrib.auth.models import User
+from django.test import TestCase
+from hc.payments.models import Subscription
+from mock import Mock, patch
+
+
+class BillingTestCase(TestCase):
+
+    def setUp(self):
+        self.alice = User(username="alice")
+        self.alice.set_password("password")
+        self.alice.save()
+
+        self.sub = Subscription(user=self.alice)
+        self.sub.subscription_id = "test-id"
+        self.sub.customer_id = "test-customer-id"
+        self.sub.save()
+
+    @patch("hc.payments.views.braintree")
+    def test_it_works(self, mock_braintree):
+
+        m1 = Mock(id="abc123", amount=123)
+        m2 = Mock(id="def456", amount=456)
+        mock_braintree.Transaction.search.return_value = [m1, m2]
+
+        self.client.login(username="alice", password="password")
+        r = self.client.get("/billing/")
+        self.assertContains(r, "123")
+        self.assertContains(r, "def456")
diff --git a/hc/payments/tests/test_cancel_plan.py b/hc/payments/tests/test_cancel_plan.py
new file mode 100644
index 00000000..9335a9df
--- /dev/null
+++ b/hc/payments/tests/test_cancel_plan.py
@@ -0,0 +1,28 @@
+from django.contrib.auth.models import User
+from django.test import TestCase
+from hc.payments.models import Subscription
+from mock import patch
+
+
+class CancelPlanTestCase(TestCase):
+
+    def setUp(self):
+        self.alice = User(username="alice")
+        self.alice.set_password("password")
+        self.alice.save()
+
+        self.sub = Subscription(user=self.alice)
+        self.sub.subscription_id = "test-id"
+        self.sub.plan_id = "P5"
+        self.sub.save()
+
+    @patch("hc.payments.views.braintree")
+    def test_it_works(self, mock_braintree):
+
+        self.client.login(username="alice", password="password")
+        r = self.client.post("/pricing/cancel_plan/")
+        self.assertRedirects(r, "/pricing/")
+
+        self.sub.refresh_from_db()
+        self.assertEqual(self.sub.subscription_id, "")
+        self.assertEqual(self.sub.plan_id, "")
diff --git a/hc/payments/tests/test_invoice.py b/hc/payments/tests/test_invoice.py
new file mode 100644
index 00000000..e73120df
--- /dev/null
+++ b/hc/payments/tests/test_invoice.py
@@ -0,0 +1,43 @@
+from django.contrib.auth.models import User
+from django.test import TestCase
+from hc.payments.models import Subscription
+from mock import Mock, patch
+
+
+class InvoiceTestCase(TestCase):
+
+    def setUp(self):
+        self.alice = User(username="alice")
+        self.alice.set_password("password")
+        self.alice.save()
+
+        self.sub = Subscription(user=self.alice)
+        self.sub.subscription_id = "test-id"
+        self.sub.customer_id = "test-customer-id"
+        self.sub.save()
+
+    @patch("hc.payments.views.braintree")
+    def test_it_works(self, mock_braintree):
+
+        tx = Mock()
+        tx.id = "abc123"
+        tx.customer_details.id = "test-customer-id"
+        tx.created_at = None
+        mock_braintree.Transaction.find.return_value = tx
+
+        self.client.login(username="alice", password="password")
+        r = self.client.get("/invoice/abc123/")
+        self.assertContains(r, "ABC123")  # tx.id in uppercase
+
+    @patch("hc.payments.views.braintree")
+    def test_it_checks_customer_id(self, mock_braintree):
+
+        tx = Mock()
+        tx.id = "abc123"
+        tx.customer_details.id = "test-another-customer-id"
+        tx.created_at = None
+        mock_braintree.Transaction.find.return_value = tx
+
+        self.client.login(username="alice", password="password")
+        r = self.client.get("/invoice/abc123/")
+        self.assertEqual(r.status_code, 403)