diff --git a/tests/test_mint.py b/tests/test_mint.py
new file mode 100644
index 0000000..620bade
--- /dev/null
+++ b/tests/test_mint.py
@@ -0,0 +1,119 @@
+import time
+from typing import List
+
+import pytest
+import pytest_asyncio
+
+from cashu.core.base import BlindedMessage, Proof
+from cashu.core.helpers import async_unwrap, sum_proofs
+from cashu.core.migrations import migrate_databases
+
+SERVER_ENDPOINT = "http://localhost:3338"
+
+from cashu.mint import migrations
+
+from cashu.mint.ledger import Ledger
+from cashu.core.settings import MINT_PRIVATE_KEY, MAX_ORDER
+from cashu.core.db import Database
+from cashu.lightning.lnbits import LNbitsWallet
+import os
+
+
+async def assert_err(f, msg):
+    """Compute f() and expect an error message 'msg'."""
+    try:
+        await f
+    except Exception as exc:
+        assert exc.args[0] == msg, Exception(
+            f"Expected error: {msg}, got: {exc.args[0]}"
+        )
+
+
+def assert_amt(proofs: List[Proof], expected: int):
+    """Assert amounts the proofs contain."""
+    assert [p.amount for p in proofs] == expected
+
+
+async def start_mint_init(ledger):
+    await migrate_databases(ledger.db, migrations)
+    await ledger.load_used_proofs()
+    await ledger.init_keysets()
+
+
+@pytest_asyncio.fixture(scope="function")
+async def ledger():
+    db_file = "data/mint/test.sqlite3"
+    if os.path.exists(db_file):
+        os.remove(db_file)
+    ledger = Ledger(
+        db=Database("test", "data/mint"),
+        seed="TEST_PRIVATE_KEY",
+        derivation_path="0/0/0/0",
+        lightning=None,
+    )
+    await start_mint_init(ledger)
+    yield ledger
+
+
+@pytest.mark.asyncio
+async def test_keysets(ledger: Ledger):
+    assert len(ledger.keysets.keysets)
+    assert len(ledger.keysets.get_ids())
+    assert ledger.keyset.id == "XQM1wwtQbOXE"
+
+
+@pytest.mark.asyncio
+async def test_get_keyset(ledger: Ledger):
+    keyset = ledger.get_keyset()
+    assert type(keyset) == dict
+    assert len(keyset) == MAX_ORDER
+
+
+@pytest.mark.asyncio
+async def test_mint(ledger: Ledger):
+    blinded_messages_mock = [
+        BlindedMessage(
+            amount=8,
+            B_="02634a2c2b34bec9e8a4aba4361f6bf202d7fa2365379b0840afe249a7a9d71239",
+        )
+    ]
+    promises = await ledger.mint(blinded_messages_mock)
+    assert len(promises)
+    assert promises[0].amount == 8
+    assert (
+        promises[0].C_
+        == "032dfadd74bb3abba8170ecbae5401507e384eafd312defda94148fa37314c0ef0"
+    )
+
+
+@pytest.mark.asyncio
+async def test_mint_invalid_blinded_message(ledger: Ledger):
+    blinded_messages_mock_invalid_key = [
+        BlindedMessage(
+            amount=8,
+            B_="02634a2c2b34bec9e8a4aba4361f6bff02d7fa2365379b0840afe249a7a9d71237",
+        )
+    ]
+    await assert_err(
+        ledger.mint(blinded_messages_mock_invalid_key), "invalid public key"
+    )
+
+
+@pytest.mark.asyncio
+async def test_generate_promises(ledger: Ledger):
+    blinded_messages_mock = [
+        BlindedMessage(
+            amount=8,
+            B_="02634a2c2b34bec9e8a4aba4361f6bf202d7fa2365379b0840afe249a7a9d71239",
+        )
+    ]
+    promises = await ledger._generate_promises(blinded_messages_mock)
+    assert (
+        promises[0].C_
+        == "032dfadd74bb3abba8170ecbae5401507e384eafd312defda94148fa37314c0ef0"
+    )
+
+
+@pytest.mark.asyncio
+async def test_get_output_split(ledger: Ledger):
+    assert ledger._get_output_split(13) == [1, 4, 8]