diff --git a/README.md b/README.md
index 51581de..0150e3d 100644
--- a/README.md
+++ b/README.md
@@ -6,7 +6,7 @@ https://observablehq.com/@tmcw/octree-color-quantization
 inspired by to https://github.com/objectProfessionals/movieMaps
 
 ```
-fn test_big_image() -> Result<(), ImageError> {
+fn quantize_image() -> Result<(), ImageError> {
     let src: RgbaImage = image::open("some_image.jpg").unwrap().into_rgba8();
     let dest = quantize(&src, 256);
     dest.save_with_format("output.jpg", image::ImageFormat::Jpeg)?;