diff --git a/src/models.py b/src/models.py
index a500eeb..8d03906 100644
--- a/src/models.py
+++ b/src/models.py
@@ -95,12 +95,15 @@ def _parse_date_german(date_str: str) -> date | None:
     day, month, year = list(map(int, date_str.split(".")))
     return date(day=day, month=month, year=year)
 
+
 def _parse_decimal_german(decimal_str: str) -> Decimal:
     return Decimal(decimal_str.replace(".", "").replace(",", "."))
 
 
 class ComdirectBase(BaseModel):
-    date_val: date | None = Field(alias="Wertstellung (Valuta)", examples=["07.09.2026"])
+    date_val: date | None = Field(
+        alias="Wertstellung (Valuta)", examples=["07.09.2026"]
+    )
     amount_eur: Decimal = Field(alias="Umsatz in EUR", examples=["32,43"])
 
     @field_validator("date_val", mode="before")
@@ -138,7 +141,9 @@ class ComdirectCreditCard(ComdirectGiro):
     )
     reference: str = Field(alias="Referenz", default="")
     text: str = Field(alias="Buchungstext", default="")
-    amount_eur: Decimal | None = Field(alias="Umsatz in EUR", examples=["32,43"], default=None)
+    amount_eur: Decimal | None = Field(
+        alias="Umsatz in EUR", examples=["32,43"], default=None
+    )
 
 
 class ComdirectDepot(ComdirectBase):
diff --git a/src/reader.py b/src/reader.py
index db7de09..4df5906 100644
--- a/src/reader.py
+++ b/src/reader.py
@@ -18,11 +18,11 @@ def reader_b4w(path: Path):
     return list(map(B4wExport.model_validate, raw))
 
 
-
 PATTERN_ACCOUNT_NAME = r'^"Umsätze ([^"]+)";"Zeitraum: .*$'
 PATTERN_HEADER = r'"([^"]+)"'
 PATTERN_DATA = r'"([^"]+)"'
 
+
 class EXPECT_LINE(Enum):
     ACCOUNT_NAME = auto()
     BLANK = auto()
@@ -33,6 +33,7 @@ class EXPECT_LINE(Enum):
 COMDIRECT_ACCOUNTS = BANK_ACCOUNTS.get("comdirect", {})
 assert isinstance(COMDIRECT_ACCOUNTS, dict)
 
+
 def reader_comdirect(path: Path):
     result = {}
     raw = _reader_raw_comdirect(path)
@@ -42,6 +43,7 @@ def reader_comdirect(path: Path):
         result[account_name] = list(map(account.ingestion_function, account_data))
     return result
 
+
 def _reader_raw_comdirect(path: Path):
 
     with path.open(encoding="latin1") as fid:
diff --git a/src/settings/constants.py b/src/settings/constants.py
index a8cb886..fc2cd09 100644
--- a/src/settings/constants.py
+++ b/src/settings/constants.py
@@ -1,8 +1,8 @@
-
 from enum import Enum
 
 IBAN_PATTERN = r"^[A-Z]{2}\d{2}[A-Z0-9]{11,30}$"
 
+
 class Currency(str, Enum):
     EUR = "EUR"
     USD = "USD"
@@ -14,5 +14,3 @@ class Currency(str, Enum):
 
     def __repr__(self):
         return f"Currency.{self.name}"
-
-
diff --git a/src/settings/models.py b/src/settings/models.py
index d58994a..485b8db 100644
--- a/src/settings/models.py
+++ b/src/settings/models.py
@@ -9,6 +9,3 @@ class AccountInfo(BaseModel):
     iban: str = Field(pattern=IBAN_PATTERN)
     ingestion_function: Callable
     currency: Currency
-
-
-
diff --git a/tests/test_reader.py b/tests/test_reader.py
index 30aea9c..927af5c 100644
--- a/tests/test_reader.py
+++ b/tests/test_reader.py
@@ -14,6 +14,8 @@ def test_reader_comdirect():
     assert len(data) == len(COMDIRECT_ACCOUNTS)
     assert set(data) == set(COMDIRECT_ACCOUNTS)
     assert all(isinstance(row, ComdirectGiro) for row in data["Girokonto"])
-    assert all(isinstance(row, ComdirectCreditCard) for row in data["Visa-Karte (Kreditkarte)"])
+    assert all(
+        isinstance(row, ComdirectCreditCard) for row in data["Visa-Karte (Kreditkarte)"]
+    )
     assert all(isinstance(row, ComdirectGiro) for row in data["Tagesgeld PLUS-Konto"])
     assert all(isinstance(row, ComdirectDepot) for row in data["Depot"])