Mock payment verification so that payment is not required for PRE pol…

…icy in tests.

tests/pre/conftest.py

@@ -6,6 +6,7 @@
     StakingProvidersReservoir,
     TACoApplicationAgent,
 )
+from nucypher.policy.payment import SubscriptionManagerPayment
 
 
 @pytest.fixture(scope="module", autouse=True)
@@ -24,3 +25,8 @@ def mock_reservoir(
     #  uses TACoApplication - should we change this (in `nucypher`)?
     mock_agent = mock_contract_agency.get_agent(TACoApplicationAgent)
     mock_agent.get_staking_provider_reservoir = mock_reservoir
+
+
+@pytest.fixture(scope="module", autouse=True)
+def mock_payment_method(module_mocker):
+    module_mocker.patch.object(SubscriptionManagerPayment, "verify", return_value=True)