The phrase "to test the method" means trying out or experimenting a specific way of doing something to see if it works effectively or produces the desired result. Full definition
The time tested method of determining if the bread has baked sufficiently is to tap the crust lightly and listen for a hollow sound. (redstaryeast.com)
This article can help to change your mindset about how to shop for insurance and also introduce a time tested method for collecting quotes. (netquote.com)
The team also tested the method on other proteins, such as those found in young muscle cells. (pnnl.gov)