diff --git a/src/flask/cli.py b/src/flask/cli.py
index 0d101d0a..7b1af5fd 100644
--- a/src/flask/cli.py
+++ b/src/flask/cli.py
@@ -22,7 +22,7 @@ from .helpers import get_load_dotenv
 try:
     import dotenv
 except ImportError:
-    dotenv = None
+    dotenv = None  # type: ignore
 
 try:
     import ssl
diff --git a/src/flask/testing.py b/src/flask/testing.py
index c8a8df38..cc2641a9 100644
--- a/src/flask/testing.py
+++ b/src/flask/testing.py
@@ -108,7 +108,7 @@ class FlaskClient(Client):
 
     application: "Flask"
     preserve_context = False
-    arg = None
+    arg = None  # type: ignore
 
     def __init__(self, *args: t.Any, **kwargs: t.Any) -> None:
         super().__init__(*args, **kwargs)