diff --git a/pydantic/_internal/_decorators.py b/pydantic/_internal/_decorators.py
index ee5104c5f4..bb0f7207ea 100644
--- a/pydantic/_internal/_decorators.py
+++ b/pydantic/_internal/_decorators.py
@@ -804,7 +804,7 @@ def count_positional_required_params(sig: Signature) -> int:
         # First argument is the value being validated/serialized, and can have a default value
         # (e.g. `float`, which has signature `(x=0, /)`). We assume other parameters (the info arg
         # for instance) should be required, and thus without any default value.
-        and (param.default is Parameter.empty or param == parameters[0])
+        and (param.default is Parameter.empty or param is parameters[0])
     )
 
 
diff --git a/pydantic/_internal/_fields.py b/pydantic/_internal/_fields.py
index 1c03fadd58..32d0d6ed73 100644
--- a/pydantic/_internal/_fields.py
+++ b/pydantic/_internal/_fields.py
@@ -317,8 +317,8 @@ def collect_dataclass_fields(
 
                 if (
                     not dataclass_field.init
-                    and dataclass_field.default == dataclasses.MISSING
-                    and dataclass_field.default_factory == dataclasses.MISSING
+                    and dataclass_field.default is dataclasses.MISSING
+                    and dataclass_field.default_factory is dataclasses.MISSING
                 ):
                     # TODO: We should probably do something with this so that validate_assignment behaves properly
                     #   Issue: https://github.com/pydantic/pydantic/issues/5470
diff --git a/pydantic/_internal/_generate_schema.py b/pydantic/_internal/_generate_schema.py
index acd4cc7710..be5076fcd1 100644
--- a/pydantic/_internal/_generate_schema.py
+++ b/pydantic/_internal/_generate_schema.py
@@ -433,7 +433,7 @@ def get_json_schema(schema: CoreSchema, handler: GetJsonSchemaHandler) -> JsonSc
                 return json_schema
 
             # we don't want to add the missing to the schema if it's the default one
-            default_missing = getattr(enum_type._missing_, '__func__', None) == Enum._missing_.__func__  # type: ignore
+            default_missing = getattr(enum_type._missing_, '__func__', None) is Enum._missing_.__func__  # pyright: ignore[reportFunctionMemberAccess]
             enum_schema = core_schema.enum_schema(
                 enum_type,
                 cases,