My op creates a pandas dataframe, I don't want to validate it so I don't think I need dagster-pandas? My op function has the type hint

-> pd.DataFrame:

But when I'm running a test I see the error

Type check failed for op "nameofop" output "result" -expected type "DataFrame". Description Value of type<class function>. ... expected value to be of Python type pandas.core.frame.DataFrame

I thought it was when I return the dataframe?