Improved testing speed

readme.md

@@ -217,7 +217,7 @@ writes a PNG per device to `target/tmp/test-images/`, scaled so a white
 surface facing the Sun is full white:
 
 ```sh
-RESOLVED_TEST_IMAGES=1 cargo test --test bodies --test mesh
+RESOLVED_TEST_IMAGES=1 cargo test --test gpu -- bodies:: mesh::
 ```
 
 ## License