diff --git a/Cargo.toml b/Cargo.toml
index 3adc72d..e4678a7 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -5,5 +5,5 @@ edition = "2021"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
-[dependencies]
+[dev-dependencies]
 png = "0.17.14"
diff --git a/src/main.rs b/tests/codec.rs
similarity index 99%
rename from src/main.rs
rename to tests/codec.rs
index 82bda6c..0713741 100644
--- a/src/main.rs
+++ b/tests/codec.rs
@@ -7,6 +7,7 @@ use std::io::BufWriter;
 use std::path::Path;
 use std::{fs::File, io::Read};
 
+#[test]
 fn main() -> Result<(), DecodeError> {
     let file = File::open("qoi_test_images/dice.qoi").unwrap();
     let mut bytes = file.bytes()