warning: associated function `new` is never used
  --> components/servo/tests/common/mod.rs:25:19
   |
24 | impl ServoTest {
   | -------------- associated function in this implementation
25 |     pub(crate) fn new() -> Self {
   |                   ^^^
   |
   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default

warning: `libservo` (test "largest_contentful_paint") generated 1 warning