diff --git a/tests/sources/musq/test_proto.py b/tests/sources/musq/test_proto.py
index 57fef46d..1f72edb1 100644
--- a/tests/sources/musq/test_proto.py
+++ b/tests/sources/musq/test_proto.py
@@ -54,23 +54,23 @@ class TestChapterView(Fixtureable[ChapterViewer]):
     def process(self, source: Path):
         return _proto_read(source, ChapterViewer)
 
-    def assertion_test(self, chapter_view: ChapterViewer):
-        assert chapter_view.status == 0
-
-        assert chapter_view.user_point.free == 0
-        assert chapter_view.user_point.event == 0
-        assert chapter_view.user_point.paid == 480
-        assert chapter_view.user_point.total_point == 480
-        assert len(chapter_view.images) == 11
-        assert chapter_view.previous_chapter is None
-        assert chapter_view.next_chapter is not None
-
-        image = chapter_view.images[0]
+    def assertion_test(self, result: ChapterViewer):
+        assert result.status == 0
+
+        assert result.user_point.free == 0
+        assert result.user_point.event == 0
+        assert result.user_point.paid == 480
+        assert result.user_point.total_point == 480
+        assert len(result.images) == 11
+        assert result.previous_chapter is None
+        assert result.next_chapter is not None
+
+        image = result.images[0]
         assert image.filename == "1.avif"
         assert image.stem == "1"
         assert image.extension == "avif"
 
-        image2 = chapter_view.images[1]
+        image2 = result.images[1]
         image2.url = "/data/1/noextension"
         assert image2.extension == ""
 
@@ -81,18 +81,18 @@ class TestChapterViewV2(Fixtureable[ChapterViewerV2]):
     def process(self, source: Path):
         return _proto_read(source, ChapterViewerV2)
 
-    def assertion_test(self, chapter_view: ChapterViewerV2):
-        assert chapter_view.status == 0
+    def assertion_test(self, result: ChapterViewerV2):
+        assert result.status == 0
 
-        assert chapter_view.user_point.free == 40
-        assert chapter_view.user_point.event == 0
-        assert chapter_view.user_point.paid == 370
-        assert chapter_view.user_point.total_point == 410
-        assert len(chapter_view.blocks) == 1
+        assert result.user_point.free == 40
+        assert result.user_point.event == 0
+        assert result.user_point.paid == 370
+        assert result.user_point.total_point == 410
+        assert len(result.blocks) == 1
 
-        assert chapter_view.next_chapter is not None
+        assert result.next_chapter is not None
 
-        block = chapter_view.blocks[0]
+        block = result.blocks[0]
         assert block.title == "Chapter 10.1"
         image = block.images[0]
         assert image.filename == "1.avif"
diff --git a/tosho_mango/cli/base.py b/tosho_mango/cli/base.py
index dbb64bf8..a25f846f 100644
--- a/tosho_mango/cli/base.py
+++ b/tosho_mango/cli/base.py
@@ -27,7 +27,7 @@
 import sys
 import traceback
 from functools import partial
-from typing import TYPE_CHECKING, Callable, List, Optional, Tuple, Union, cast
+from typing import IO, TYPE_CHECKING, Any, Callable, List, Optional, Tuple, Union, cast
 
 import click
 from click.core import Context
@@ -99,7 +99,7 @@ def __init__(self, message, exc_info):
         super().__init__(message)
         self.exc_info = exc_info
 
-    def show(self):
+    def show(self, file: IO[Any] | None = None):
         """Show the error message and traceback."""
         emoji = ""
         if console.is_advanced():
diff --git a/tosho_mango/sources/kmkc/client.py b/tosho_mango/sources/kmkc/client.py
index 40292e96..6d4ab285 100644
--- a/tosho_mango/sources/kmkc/client.py
+++ b/tosho_mango/sources/kmkc/client.py
@@ -87,7 +87,7 @@ class KMClientBase:
 
     API_HOST = b64decode("aHR0cHM6Ly9hcGkua21hbmdhLmtvZGFuc2hhLmNvbQ==").decode("utf-8")
     CDN_HOST = b64decode("aHR0cHM6Ly9jZG4ua21hbmdhLmtvZGFuc2hhLmNvbQ==").decode("utf-8")
-    _config: KMConfigWeb | KMConfigMobile
+    _config: KMConfigWeb | KMConfigMobile  # type: ignore
 
     def __init__(self, config: KMConfigWeb | KMConfigMobile) -> None:
         self._config = config
@@ -287,7 +287,7 @@ class KMClientWeb(KMClientBase):
 
     API_HOST = b64decode("aHR0cHM6Ly9hcGkua21hbmdhLmtvZGFuc2hhLmNvbQ==").decode("utf-8")
     CDN_HOST = b64decode("aHR0cHM6Ly9jZG4ua21hbmdhLmtvZGFuc2hhLmNvbQ==").decode("utf-8")
-    _config: KMConfigWeb
+    _config: KMConfigWeb  # type: ignore
 
     def __init__(self, config: KMConfigWeb) -> None:
         super().__init__(config)