diff --git a/end_to_end_tests/openapi.json b/end_to_end_tests/openapi.json
index f384dbbdd..4af206d39 100644
--- a/end_to_end_tests/openapi.json
+++ b/end_to_end_tests/openapi.json
@@ -1063,7 +1063,6 @@
         "type": "object"
       },
       "ModelWithAdditionalPropertiesInlined": {
-        "title": "ModelWithAdditionalPropertiesInlined",
         "type": "object",
         "properties": {
           "a_number": {
diff --git a/openapi_python_client/parser/properties/model_property.py b/openapi_python_client/parser/properties/model_property.py
index 0af0b1cea..a40460886 100644
--- a/openapi_python_client/parser/properties/model_property.py
+++ b/openapi_python_client/parser/properties/model_property.py
@@ -180,18 +180,18 @@ def build_model_property(
         parent_name: The name of the property that this property is inside of (affects class naming)
         config: Config data for this run of the generator, used to modifying names
     """
-    class_name = data.title or name
+    class_string = data.title or name
     if parent_name:
-        class_name = f"{utils.pascal_case(parent_name)}{utils.pascal_case(class_name)}"
-    class_info = Class.from_string(string=class_name, config=config)
+        class_string = f"{utils.pascal_case(parent_name)}{utils.pascal_case(class_string)}"
+    class_info = Class.from_string(string=class_string, config=config)
 
-    property_data = _process_properties(data=data, schemas=schemas, class_name=class_name, config=config)
+    property_data = _process_properties(data=data, schemas=schemas, class_name=class_info.name, config=config)
     if isinstance(property_data, PropertyError):
         return property_data, schemas
     schemas = property_data.schemas
 
     additional_properties, schemas = _get_additional_properties(
-        schema_additional=data.additionalProperties, schemas=schemas, class_name=class_name, config=config
+        schema_additional=data.additionalProperties, schemas=schemas, class_name=class_info.name, config=config
     )
     if isinstance(additional_properties, Property):
         property_data.relative_imports.update(additional_properties.get_imports(prefix=".."))
diff --git a/tests/test_parser/test_properties/test_model_property.py b/tests/test_parser/test_properties/test_model_property.py
index b366c2333..abe0e5323 100644
--- a/tests/test_parser/test_properties/test_model_property.py
+++ b/tests/test_parser/test_properties/test_model_property.py
@@ -178,7 +178,7 @@ def test_bad_props_return_error(self):
         assert err == PropertyError(detail="unknown type not_real", data=oai.Schema(type="not_real"))
 
     def test_bad_additional_props_return_error(self):
-        from openapi_python_client.parser.properties import Schemas, build_model_property
+        from openapi_python_client.parser.properties import Config, Schemas, build_model_property
 
         additional_properties = oai.Schema(
             type="object",
@@ -190,7 +190,7 @@ def test_bad_additional_props_return_error(self):
         schemas = Schemas()
 
         err, new_schemas = build_model_property(
-            data=data, name="prop", schemas=schemas, required=True, parent_name=None, config=MagicMock()
+            data=data, name="prop", schemas=schemas, required=True, parent_name=None, config=Config()
         )
 
         assert new_schemas == schemas