fix tests a little

tests/core/views/test_api.py

@@ -11,10 +11,11 @@ from lnbits.core.views.api import (
     api_payment,
     api_payments_create_invoice,
 )
-from lnbits.settings import wallet_class
+from lnbits.settings import get_wallet_class
 
 from ...helpers import get_random_invoice_data, is_regtest
 
+WALLET = get_wallet_class()
 
 # check if the client is working
 @pytest.mark.asyncio
@@ -209,7 +210,7 @@ async def test_api_payment_with_key(invoice, inkey_headers_from):
 
 # check POST /api/v1/payments: invoice creation with a description hash
 @pytest.mark.skipif(
-    wallet_class.__name__ in ["CoreLightningWallet"],
+    WALLET.__class__.__name__ in ["CoreLightningWallet"],
     reason="wallet does not support description_hash",
 )
 @pytest.mark.asyncio