diff --git a/src/errors/types.rs b/src/errors/types.rs
index d3a6cdebb..57025f9b5 100644
--- a/src/errors/types.rs
+++ b/src/errors/types.rs
@@ -56,15 +56,12 @@ fn field_from_context<'py, T: FromPyObject<'py>>(
         .map_err(|_| py_error_type!(PyTypeError; "{}: '{}' context value must be a {}", enum_name, field_name, type_name_fn()))
 }
 
-fn cow_field_from_context<'py, T: FromPyObject<'py>, B: ?Sized + 'static>(
+fn cow_field_from_context<'py, T: FromPyObject<'py>, B: ToOwned<Owned = T> + ?Sized + 'static>(
     context: Option<&Bound<'py, PyDict>>,
     field_name: &str,
     enum_name: &str,
     _type_name_fn: fn() -> &'static str,
-) -> PyResult<Cow<'static, B>>
-where
-    B: ToOwned<Owned = T>,
-{
+) -> PyResult<Cow<'static, B>> {
     let res: T = field_from_context(context, field_name, enum_name, || {
         type_name::<T>().split("::").last().unwrap()
     })?;
diff --git a/src/serializers/ser.rs b/src/serializers/ser.rs
index 170cd1849..50f006e7b 100644
--- a/src/serializers/ser.rs
+++ b/src/serializers/ser.rs
@@ -236,23 +236,17 @@ where
         self.serialize_str(variant)
     }
 
-    fn serialize_newtype_struct<T: ?Sized>(self, _name: &'static str, value: &T) -> Result<Self::Ok>
-    where
-        T: Serialize,
-    {
+    fn serialize_newtype_struct<T: Serialize + ?Sized>(self, _name: &'static str, value: &T) -> Result<Self::Ok> {
         value.serialize(self)
     }
 
-    fn serialize_newtype_variant<T: ?Sized>(
+    fn serialize_newtype_variant<T: Serialize + ?Sized>(
         self,
         _name: &'static str,
         _variant_index: u32,
         variant: &'static str,
         value: &T,
-    ) -> Result<Self::Ok>
-    where
-        T: Serialize,
-    {
+    ) -> Result<Self::Ok> {
         tri!(self
             .formatter
             .begin_object(&mut self.writer)
diff --git a/src/validators/arguments.rs b/src/validators/arguments.rs
index 63ef36d7f..075bc009e 100644
--- a/src/validators/arguments.rs
+++ b/src/validators/arguments.rs
@@ -64,7 +64,6 @@ impl BuildValidator for ArgumentsValidator {
                 .map(|py_str| py_str.to_str())
                 .transpose()?
                 .unwrap_or("positional_or_keyword");
-
             let positional = mode == "positional_only" || mode == "positional_or_keyword";
             if positional {
                 positional_params_count = arg_index + 1;