ImageDataBunch.from_df test set issue

Part 1 (2019) Advanced (Part 1 v3)
1 
def from_df(cls, path:PathOrStr, df:pd.DataFrame, folder:PathOrStr='.', sep=None, valid_pct:float=0.2,
            fn_col:IntsOrStrs=0, label_col:IntsOrStrs=1, test:Optional[PathOrStr]=None, suffix:str=None,
            **kwargs:Any)->'ImageDataBunch':

Can’t load test set images using dataframe. Only options are of PathOrStr.
When trying to load test set using dataframe by substituting df, it shows error of missing labels. As test dataframe doesn’t have column for labels.

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Probably, it should be str or Path object, that is the name of test folder.