diff --git a/src/accounting/report/report_chooser.py b/src/accounting/report/report_chooser.py
index 473f6ca..925d587 100644
--- a/src/accounting/report/report_chooser.py
+++ b/src/accounting/report/report_chooser.py
@@ -21,7 +21,6 @@ This file is largely taken from the NanoParma ERP project, first written in
 
 """
 import typing as t
-from enum import Enum
 
 from flask import url_for
 from flask_babel import LazyString
@@ -31,12 +30,7 @@ from accounting.locale import gettext
 from accounting.models import Currency
 from accounting.template_globals import default_currency_code
 from .period import Period
-
-
-class ReportType(Enum):
-    """The report types."""
-    JOURNAL: str = "journal"
-    """The journal."""
+from .report_type import ReportType
 
 
 class ReportLink:
diff --git a/src/accounting/report/report_type.py b/src/accounting/report/report_type.py
new file mode 100644
index 0000000..a3bafdc
--- /dev/null
+++ b/src/accounting/report/report_type.py
@@ -0,0 +1,26 @@
+# The Mia! Accounting Flask Project.
+# Author: imacat@mail.imacat.idv.tw (imacat), 2023/3/4
+
+#  Copyright (c) 2023 imacat.
+#
+#  Licensed under the Apache License, Version 2.0 (the "License");
+#  you may not use this file except in compliance with the License.
+#  You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+#  Unless required by applicable law or agreed to in writing, software
+#  distributed under the License is distributed on an "AS IS" BASIS,
+#  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+#  See the License for the specific language governing permissions and
+#  limitations under the License.
+"""The report types.
+
+"""
+from enum import Enum
+
+
+class ReportType(Enum):
+    """The report types."""
+    JOURNAL: str = "journal"
+    """The journal."""
diff --git a/src/accounting/report/reports.py b/src/accounting/report/reports.py
index b70b251..f3eb715 100644
--- a/src/accounting/report/reports.py
+++ b/src/accounting/report/reports.py
@@ -32,8 +32,9 @@ from accounting.utils.pagination import Pagination
 from accounting.utils.txn_types import TransactionType
 from .period import Period
 from .period_choosers import PeriodChooser, JournalPeriodChooser
-from .report_chooser import ReportChooser, ReportType
+from .report_chooser import ReportChooser
 from .report_rows import ReportRow, JournalRow
+from .report_type import ReportType
 
 
 class JournalEntryReport(ABC):