# Pattern: Class variable overridden in subclass, methods called from subclass 

class Request:
    def __init__(self, url: str) -> None:
        self.url: str = url

class FormRequest(Request):
    @classmethod
    def from_response(cls, response: str) -> FormRequest:
        return cls(response)


class BaseTest:
    request_class = Request

class MyTest(BaseTest):
    request_class = FormRequest

    def test_from_response(self) -> None:
        # FP: pyrefly resolves self.request_class as type[Request]
        # (from the base class), ignoring the override in this class
        req = self.request_class.from_response(
            "http://example.com/form",
        )