diff --git a/cashu/wallet/api/router.py b/cashu/wallet/api/router.py
index 0d7a1c72..c495b616 100644
--- a/cashu/wallet/api/router.py
+++ b/cashu/wallet/api/router.py
@@ -145,7 +145,7 @@ async def create_invoice(
     response_model=PaymentStatus,
 )
 async def invoice_state(
-    payment_hash: str = Query(default=None, description="Payment hash of paid invoice"),
+    payment_request: str = Query(default=None, description="Payment request to check"),
     mint: str = Query(
         default=None,
         description="Mint URL to create an invoice at (None for default mint)",
@@ -154,7 +154,7 @@ async def invoice_state(
     global wallet
     if mint:
         wallet = await mint_wallet(mint)
-    state = await wallet.get_invoice_status(payment_hash)
+    state = await wallet.get_invoice_status(payment_request)
     return state
 
 
diff --git a/tests/test_wallet.py b/tests/test_wallet.py
index 9785b478..886ce73f 100644
--- a/tests/test_wallet.py
+++ b/tests/test_wallet.py
@@ -291,10 +291,8 @@ async def test_melt(wallet1: Wallet):
     assert wallet1.balance == 128
 
     invoice_payment_request = ""
-    invoice_payment_hash = ""
     if is_regtest:
         invoice_dict = get_real_invoice(64)
-        invoice_payment_hash = str(invoice_dict["r_hash"])
         invoice_payment_request = invoice_dict["payment_request"]
 
     if is_fake:
diff --git a/tests/test_wallet_api.py b/tests/test_wallet_api.py
index 2e391743..d62eb3d6 100644
--- a/tests/test_wallet_api.py
+++ b/tests/test_wallet_api.py
@@ -33,12 +33,14 @@ async def test_invoice(wallet: Wallet):
         while state.pending:
             print("checking invoice state")
             response2 = client.get(
-                f"/lightning/invoice_state?payment_hash={invoice_response.checking_id}"
+                f"/lightning/invoice_state?payment_request={invoice_response.payment_request}"
             )
             state = PaymentStatus.parse_obj(response2.json())
             await asyncio.sleep(0.1)
             print("state:", state)
         print("paid")
+        await wallet.load_proofs()
+        assert wallet.available_balance == 100
 
 
 @pytest.mark.skipif(is_regtest, reason="regtest")
@@ -175,7 +177,7 @@ async def test_flow(wallet: Wallet):
         while state.pending:
             print("checking invoice state")
             response2 = client.get(
-                f"/lightning/invoice_state?payment_hash={invoice_response.checking_id}"
+                f"/lightning/invoice_state?payment_request={invoice_response.payment_request}"
             )
             state = PaymentStatus.parse_obj(response2.json())
             await asyncio.sleep(0.1)