mock function affect other tests after Patches.Reset()

func TestA(t *testing.T) {
Convey("TestA", t, func() {
Convey(" test1", func() {
Patches := ApplyFunc(**upgrade**, func(_ int ,_ uint) int{
return 10
})
defer Patches.Reset()
})
}
func **upgrade**(age int, num uint) int {
}

func TestB(t *testing.T){
Cover("TestB",t,func(){
res := **upgrade**(1,1) //it should be return 11 but affect by mock in **TestA**
So(res, ShouldEqual, 11)
})