fix FS init regression on UT
fix FS init regression on UT

milikhin/seabass,milikhin/seabass,milikhin/seabass,milikhin/seabass,milikhin/seabass,milikhin/seabass,milikhin/seabass,milikhin/seabass,milikhin/seabass,milikhin/seabass,milikhin/seabass,milikhin/seabass