diff --git a/fastapi/_compat/shared.py b/fastapi/_compat/shared.py
index a82eeba08..3a11e88ac 100644
--- a/fastapi/_compat/shared.py
+++ b/fastapi/_compat/shared.py
@@ -60,7 +60,7 @@ def lenient_issubclass(
 def _annotation_is_sequence(annotation: Union[type[Any], None]) -> bool:
     if lenient_issubclass(annotation, (str, bytes)):
         return False
-    return lenient_issubclass(annotation, sequence_types)  # type: ignore[arg-type]
+    return lenient_issubclass(annotation, sequence_types)
 
 
 def field_annotation_is_sequence(annotation: Union[type[Any], None]) -> bool:
@@ -76,7 +76,7 @@ def field_annotation_is_sequence(annotation: Union[type[Any], None]) -> bool:
 
 
 def value_is_sequence(value: Any) -> bool:
-    return isinstance(value, sequence_types) and not isinstance(value, (str, bytes))  # type: ignore[arg-type]
+    return isinstance(value, sequence_types) and not isinstance(value, (str, bytes))
 
 
 def _annotation_is_complex(annotation: Union[type[Any], None]) -> bool:
diff --git a/fastapi/_compat/v2.py b/fastapi/_compat/v2.py
index 9456873dd..c4fa49e40 100644
--- a/fastapi/_compat/v2.py
+++ b/fastapi/_compat/v2.py
@@ -457,7 +457,7 @@ def serialize_sequence_value(*, field: ModelField, value: Any) -> Sequence[Any]:
             origin_type = get_origin(union_arg) or union_arg
             break
     assert issubclass(origin_type, shared.sequence_types)  # type: ignore[arg-type]
-    return shared.sequence_annotation_to_type[origin_type](value)  # type: ignore[no-any-return]
+    return shared.sequence_annotation_to_type[origin_type](value)  # type: ignore[no-any-return,index]
 
 
 def get_missing_field_error(loc: tuple[str, ...]) -> dict[str, Any]:
diff --git a/fastapi/dependencies/utils.py b/fastapi/dependencies/utils.py
index 5a461c505..3db006a91 100644
--- a/fastapi/dependencies/utils.py
+++ b/fastapi/dependencies/utils.py
@@ -915,7 +915,7 @@ async def _extract_form_body(
             and value_is_sequence(value)
         ):
             # For types
-            assert isinstance(value, sequence_types)  # type: ignore[arg-type]
+            assert isinstance(value, sequence_types)
             results: list[Union[bytes, str]] = []
 
             async def process_fn(