In the study (Drapella, 2016), the author includes the thesis on erroneous method of calculating test statistics in the Fisher-Snedecor (FS) test. This method is commonly described in the literature, and examples, which cites the author, come from Brandt (1998) and Starzyńska (2002) textbooks as well as Zielinski’s statistical tables (1972). The thesis is supported by numerical experiment and analytical considerations. This article indicates an error in the discussed study (Drapella, 2016), thus negates the included thesis, and shows that the said literature does not contain incorrect information associated with the FS test.