Golang mocking with pointer reference in function parameters for unit test

I am working on Rest API project in golang. Assume I have a handler for routing and service which will do the application logic for the handler functions.

in handler.go

...
var userDto UserDto
err = UserService.UpdateUser(ctx, &userDto)
if err != nil {
    c.AbortWithStatus(http.StatusNotFound)
    return
}
...

I am using pointer reference in my service package functions.

Now I am writing a unit test for handler there I am going to mock the userService. But while mocking I can write like

suite.userServiceMock.On("UpdateUser", mock.Anything, userDto).Return(nil)

But here I have the option only to change the error return, not the Dto. I will be glad if someone helps me with this scenario.