diff --git a/benches/dithering.rs b/benches/dithering.rs
index 6cd6235..f0aa944 100644
--- a/benches/dithering.rs
+++ b/benches/dithering.rs
@@ -3,14 +3,17 @@ use image::{ImageReader, RgbImage};
 use pi_frame_server::dither::{DitherMethod, DitheredImage, Palette};
 
 fn criterion_benchmark(c: &mut Criterion) {
+    let mut group = c.benchmark_group("dithering_benchmark");
+
     let sample_file = "sample_0.tiff";
     let image: RgbImage = ImageReader::open(format!("samples/{sample_file}"))
         .expect("file exists")
         .decode()
         .expect("file is valid")
         .into_rgb8();
+    group.sample_size(20);
 
-    c.bench_with_input(BenchmarkId::new("dither", "sample_0"), &image, |b, i| {
+    group.bench_with_input(BenchmarkId::new("dither", "sample_0"), &image, |b, i| {
         b.iter(|| {
             let mut method = DitherMethod::Atkinson.get_ditherer();
             let mut result = DitheredImage::new(